T. D. A. Cockerell.
Some Bees From Eldora, Colorado.
Psyche 17(6):244-247, 1910.

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Psyche [December
SOME BEES FROM ELDORA, COLORADO.
The University of Colorado, Boulder, Colo. My wife and I spent the afternoon of August 18 and morning of August 19,1910, at Eldora, in the mountains of Boulder County, Colorado. The locality is in the Canadian Zone, at an altitude of about 8,550 ft., and has a bee-fauna rather widely different from that of Boulder. So many interesting species were collected that it seems worth while to put the whole on record. At this season of the year, the best bee-plant at Eldora is Grindelia sub- ulpina Greene, a very fine species which makes the valleys gay with its orange-yellow flowers. Less abundant, and much less conspicuous is Phacelia lewophylla Torrey, with white flowers. These two are referred to by their generic names alone in the following list:
Andrena n. sp. Much like A, hirticincta, but hair at end of female abdomen pale. Females rather common at Grindelia; one male on Erigeron. This species
was named in MS. by Viereck, from specimens collected in New Mexico; it will be published in his revision.
Halictus lerouxii Lep. Both sexes common at Grindelia. Halictus ruidosensis Ckll. Both sexes at Phacelia, the males abundant. Agapostemon texanus subtilior Ckll. One male at Grindelia. This sex is undescribed; it differs from true texanus by its smaller size, the metathorax more delicately sculptured, black on legs reduced, and flagellum paler. Specodes (Sphecodium) fragariae Ckll., var. a. Female smaller, about 5 mm. long, face more narrowed below, middle of abdomen much suffused with black. One at Phacelia.
This may be a distinct species, but I have only a single specimen, and fragarice, as represented by numerous specimens collected at Florissant, is very variable.
Perdita snowii Ckll.
Common at Grindelia. This species was described from a single specimen collected by Snow in 1892 in Estes Park, Colorado. Later, I took a specimen at Santa F6, New Mexico, but the species has escaped rediscovery in colorado until the present time.
The male, which was not known, rum in my table in Proc. Phila. Acad. Sci., 1896, to.28, except that there is a small black mark or band along each side of the upper part of the clypeus, not on the clypeus itself. It runs on to 30, but face is bare, while mesothorax is hairy. The following
characters are distinctive: Face below antenna" bright chrome yellow; yellow in median line extending above antennae as a small spear-head shaped mark; at sides



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19101 Cockerell-Bees from Eldora, Colorado 245 extending upwards broadly, then abruptly ending, except for a line along the eye, the whole like a closed hand with index finger pointed; a narrow yellow stripe along lower half of posterior orbits; scape yellow; flagellum yellow beneath; anterior knees yellow and their tibiae broadly yellow in front; tubercles and two marks on upper border of prothorax yellow; middle legs with much yellow, but hind legs with only knees yellow; abdominal bands yellow, broad, entire, except the first, which is narrowly interrupted. A marked character of the species is the dull hairy mesothorax.
Panurginus didirupa Ckll. Both sexes taken; the females at Grindelia. Panurginus bakeri Ckll. Both sexes at Phacelia. The female is new; it is about 5% mm. long, with the legs black, including tarsi; face all black, shining; wings smoky; nervures and stigma dark. It resembles the female of P. pauper, but is easily separated by the dark tegulse and more distinctly punctured meso- thorax.
Nomada accepta Cress. One female at Grindelia. Triepeolus subalpinus n. sp. One at Grindelk 9 . Length about 11% mm.; a species with "false pygidium" relatively small, related to T. micropygius Rob., but anterior legs black, with tarsi reddish; middle femora black above, red beneath; hind femora and middle and hind tibiae and tarsi red; spurs black; upper part of pleura covered with dull pale yellowish hair, thin in middle posteriorly, lower half bare, coarsely and closely punctured, but some of the shining surface visible on the lower part; labrum black, densely punctured; mandibles black, faintly reddish toward apex; clypeus closely, very minutely punctured, with scattered large punctures; antennse black, third joint reddish apically; mesothorax very densely punctured, with a light hair-margin at sides and behind, and a pair of short and broad, not dense, anterior longitudinal bands; teeth at sides of scutellum hardly produced; tubercles black; tegulse reddish-brown, closely punctured; second submarginal cell narrowed almost to a point above; black area of first abdominal segment a broad transverse band, truncate laterally; apical and basal light bands of first segment narrowly inter- rupted, the others entire, fifth with a large, light patch on each side; band on second segment with anterior lateral extensions broadly triangular, the angle formed very obtuse, Superficially like T. pectoralis Rob., but easily separated by the reduced axillar teeth, form of band on second abdominal segment, much denser punctures on lower part of pleura, etc.
Epeolus eldoradensis n. sp. Two at Grindelia. 8. Length about 8 to 9 mm.; very close to E. argyreus Ckll., but wings brown- ish, middle and hind legs more or less red, and third antenna1 joint without red. The metathoracic area is larger than in argyreus, the cheeks are broader, and the femora are not so hairy.
Eyes sage green;
hair of face pure shining white; clypeus densely minutely punctured, without large punctures; antennae black; mesothorax with rather thin pale creamy hair, rather evenly distributed, so that there are no definite markings; axillar teeth very short and blunt; tubercles black; tegulse dark reddish-brown;




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846 Pqch (December
second s. m. narrow, ~arrowed about one-half above; pleura very densely covered. with shilling white hair; middle and hind spurs black; anterior legs black; middle- red, the femora black above; hind legs red; abdominal segments 1 to 6 covered with pale ochreowtinted hair, no definite light patch on first, but a small discal area where the hair is thinner, and there are a !w reddish scales; second segment. with a broad basal band of reddish hair, not reaching the sides, third with a nar- rower band of the same land.
Var. a. Smaller; Midde femora black, as also outer side of their tibiss; hind, femora black except at apex, and their ti& suffused with blackish on outer side; first abdominal segment, with a transverse, rather poorly defined black (bare) band; second with the basal half black exmpt at sides. This looks distinct, but ia. probably only a variety, as ArgpselenM minima Rob. varies in much the same- manner as to the abdomen.
It is the var. a. which most resembles B. wggmw. CHsodon terminalis Oess. One female at Cham~nerioft ang&i/vlium. Melissodea hymenoridis Ckll, Females at Orimielta, also nesting in ground.. Two were observed to enter the same nest. M. confusa Cress. Both sexes at Griwtelia. M. confusiformia Ckll. One female at Grindelk. M. mennacha Cress. One male at Grin.de.& Tilia is the same w the New Mexico insect I have identified as menvacha, but differs from a Colorado example- ,
(not the type) from the Cresson collection. I believe it is the real mmvach<tr
and that Cresson confused two or more species in his collection. Coelioxys porterae CHI. One- female on sand. Megachile wootoni dogaster CH1.
One female at Campanula petiolata*
Megachile pugnata Say. Females at Grinddia. Megachile perihirta CUl. h e male at Griwielia. Megachile relativa Cress. Females at Orindelia. Alcidamea simplex Cress. Females at Pkaceh. Osmia copelandica CHI. Female at Phoc~tIå´ia The second known specimen. Osmia pentstemonis CkU. One female at OnmUIia,. Osmia wardiana CHI. One female at OnndeIia. This is narrower than usual, but apparently not a distinct species.
Osrnia fulfiida Cress. Tw> females at Phacdia. These are green, and agree with the form named ciridii by Creasou, except that the hair of the thorax above, instead of bring black, is reddish with a few blade hairs intermixed. Osmia densa Creaa. Two females, one at Ctrimielut. A variable species. Osmla grindelite n. ap.
One at Qrindeifa. Var. a. at PhacslW.
9. Length about @nun.;
the abdomen aubgiobose; head about as wide as thorax, dark greenish and purplish, densely punctured; clypeus maMy dark purplish; cheeks olive green; law, front and vertex with long coarse black hair, occiput with some white hair, mandibles tridentate; fkqplluin faintly reddish beneath empt at base; memthorax black on disc, green, at sides; acutelhun and postBcirtdluin olive-green, but metakhorax dark bluish; hair of thorax above white, with. long black hairs sparsely intermixed; of pleura black, comparatively ,
short, of sides of metttthorl~t white; t.egu1e piceous; whga stained with blown; kgs black, not metallic; abdomen dark green. the hind margins of the sepenta



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19101 Cockerell-Beesfrom Eldora, Colora,do 247 bluer; first segment with white hair, the others with it thin, short and black, a little glittering white principally along hind margins of segments and on apical segment; scopa black.
In my table in Univ. of Colo. Studies, 1907, p. 250, this runs to 0. wilmattoe, from which it differs by its darker, green, coloration, and the smaller subglobose abdomen. The hair on the pleura is only about half as long as in 0. pikei. Var. a. Similar, but hair of pleura somewhat pallid. This is much darker than 0. phaceli~, and the tegulae are not conspicuously green in front as in that species. Anthidium tenuiflorae Ckll.
Both sexes at Grindelia.
I
Dianthidium pudicum Cress. Both sexes at Grindelia. Apis mellifera ligustica Spin. Only one seen; at Grindelia. Bombus flavifrons Cress. At Grindelia.
Bombus juxtus Cress. At Phacelia.
Bombus rufocinctus astragali Ckll. One male at Grindelia. For other records of Bombidse from Eldora, see Univ. of Colo. Studies, IV, pp. 257-258, and VII, p. 186. SOME BEES FROM ECUADOR.
I am indebted to J^rs. L. H. Dyke for some bees which she recently collected at Portobelo (pronounced Porto Bello), Ecua- dor, at an altitude of about 4,000 ft.
(1) Euglossa cordata (L.)
(2) Xylocopa varians ecuadorica Ckll. This was described only last year, from material in the British Museum.
(3) Mesocheira bicolor elizabethae subsp. nov. 9. Length 12 mm., in' most respects similar to M. bicolor. Face, cheeks, and occiput with dull white (not reddish) hair, vertex with black; antennae black, the first three joints and extreme base of fourth broadly red beneath; thorax
above dark green, the scanty hair dull white and black; abdomen a fine greenish blue, almost steel-color, but greener, the basal part of the first segment dark red. Extraordinarily like Melissa decorata Smith, but the scutellum quite different. Named after Mrs. Dyke's little daughter Elizabeth. These bees illustrate the fact, already indicated by other col- lections, that the Brazilian bee-fauna passes over into the mountains of Ecuador, the species becoming in most cases dis- tinctly modified.
T. D. A. COCKERELL.




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