E. W. Hall.
Descriptions of New Tryphoninae of the Tribe Ctenopelmini (Hymenoptera; Ichneumonidae).
Psyche 26(6):155-159, 1919.

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19191 Sturtevant-Species Closely Resembling Drosophila Melanogaster 155 by Mr. A. M. Brown that led to the identification of D. simulans as a distinct species. Males have, however, been obtained by using D. melanogaster females that give what are known to students of heredity as "non-disjunctional exceptions." A full account of
these experiments and a description of the hybrids will be pub- lished 1ater.l
DESCRIPTIONS OF NEW TRYPHONINE OF THE TRIBE CTENOPELMINI (HYMENOPTERA; ICHNEUMONIDB) .2 BY MISS ESTHER W. HALL,
Bussey Institution, Harvard University.
Polyblastus fdvilinealis sp. nov.
8. Length 6 mm. Head wider than thorax, thickened behind eyes. Malar line equal to one-half the base of clypeus. Distance
from ocellus to clypeus slightly longer than from eye to eye. Front protruding below antennae, which are almost as long as body and composed of 28 segments. First flagellar joint slightly longer than scape and pedicel, four times as long as wide at apex. Four- teenth segment about twice as long as wide and one-half the length of first flagellar joint. Scutellum flat, margined. Pronotum prominent. Parapsidals present anteriorly. Areolation complete. Abdomen subsessile. Length of petiole two and one-half times width of base; width at apex twice that of base. Third segment twice as broad as long and one-fifth narrower than thorax. Carinse with groove between and extending almost to apex. Base of hind coxae to apex of femora longer than abdomen. Five teeth on claws. Wings large, areolet small, petiolate, rhomboidal. Head, except cheeks, finely punctate; thorax, except slightly rugulose propodeum, sparsely punctate; abdomen smooth. Black. Rufous as follows: apical half of clypeus, collar, and lower pleurae, propodeum, hind' cox= and femora, outside of four anterior femora. Antennae and hind tarsi dusky. Mandibles except teeth, underside of pedicel, remainder of fore legs, hind 1 It seems highly probable that the sterile "unisexual broods" of Drosophiia reported by Quackenbush (1910. Science, n. s. 32; 183-1851 were hybrids between D. melanogaster and D. simulans.
2Contributions from the Entomological Laboratory of the Bussy Institution, Harvard University, No. 167.




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156 Psyche [December
tibiae except dusky apices, tegulse, vein bases, lines between pro- and meso- and between meso- and metapleurse, narrow lines on apex of second and third abdominal segments, whitish. 9 .
Length 7 mm. Areola open anteriorly; face more coarsely punctate. Ovipositor bearing eggs. Thorax, except pronoturn, and base of petiole rufous. Fore legs darker, otherwise like the male.
Male from Auburndale, Mass., and female from Riverside, Mass. Polyblastus scopioroides sp. nov.
8. Length 7 mm. Slight, head not so swollen, as wide as thorax. Claws slender, with 4-5 small teeth. Distance from eye to eye almost equal to that from ocellus to clypeus. Malar line equals one-half the base of clype&. Antenna "with 31 segments, 5-16th swollen. Tenth segment one-third again as wide and two- thirds as long as first flagellar segment which is three and two- thirds times as long as wide at apex and the same length as scape and pedicel. Parapsidal furrows faint. Pleurae swollen. Basal transverse carinae wanting. Abdomen sessile, carinse extending three-fourths the length of the petiole, which equals, in length, the apical width. Third segment twice as broad as long and not as wide as thorax. Legs slender. Areolet rhomboidal, petiolate. Face densely, punctate, thorax rather coarsely so, abdomen sparsely so, except petiole, which is coarsely so at base and rugulose near apex.
Black. Rufous as follows: apex of clypeus, segments 2, 3, 4, apex of petiole, legs except apex of posterior femora, tibiae, and tarsi which are dusky. Mandibles except teeth, bases of veins, spot on stigma, and, indistinctly, the trochanters, white. In general appearance like Scopiorus subcrassus, Cress. but without transverse abdominal furrows.
Male from Woods Hole, Mass.
Polyblastus kaniacensis sp. nov.
9 . Length 8 mm. Head not so thick as in other species. Face protuberant. Distance from ocellus to clypeus one and one- third times the distance from eye to eye. Malar line one-half the basal width of mandible. Clypeus narrow with transverse ridge near base. Antennae with 34-35 segments. First flagellar seg-



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19191 Hall-New Tryphoninoe of the Tribe Ctenopelmini 157 ment one-fifth longer than scape and pedicel. Apical 6 segments
each as long as broad except the last segment which is one and one- half times the length of previous one. Scutellum flat, margined, sloping suddenly behind. No parapsidal furrows. Pleurae rather flat. Basal carina wanting on propodeum. Abdomen sessile, carinse extending to middle of petiole, apex of petiole one and one- half times the width at base and two-thirds the length. Third segment not quite as wide as thorax. Ovipositor short. Legs rather stout, claws pectinate. Face and propodeum coarsely punctate, rest of thorax sparsely so; abdomen finely punctate. Areolet rhomboidal, petiolate. Humeral cross-vein of hind wing broken at middle.
Black. Rufous as follows: apical part of clypeus, apex of petiole and remainder of abdomen, apex of trochanters, femora except black apices of hind ones and yellow tips of others. Coxae and bases of trochanters black, rest of fore legs yellow-ferrugineous with last tarsal segment dusky; remainder of hind legs dusky. Bases of hind tibiae yellow. Tegulse, bases of wing veins, palpi and mandibles except teeth, yellowish-white. Tibiae with a faint ruf ous annulus.
Female from Kaniac Butte, Washington, collected by Prof. A. L. Melander, I-IV, 1912.
Grypocentrus rufiterminalis sp. nov.
$ . Length 9-10 mm. Head large. Distance from eye to eye almost two-thirds the distance between ocellus and clypeus. Malar space one-third the width of clypeus. Face slightly convex. Clypeus wide, almost from eye to eye, with transverse ridge and short bristles at apex. Antennae with 36 segments, extending to middle of abdomen; segments 9-25 thickened. Scape two-thirds the length of first flagellar segment, which is three times as long as width at apex. Middle segments and those beyond slightly longer than wide. Parapsidals present anteriorly. Scutellum rounded, sloping gradually behind. Pleurae convex. Areola open anteriorly, propodeum otherwise completely areolated. Apex of pet,iole one- third wider than base, its length two and one-third times the basal width. Carinse close together and extending almost to apex. Length of segment about the same as width,at base. Legs robust; claws finely pectinate. Body covered with silver pile. Face very



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158 Psyche [December
coarsely punctate except apex of clypeus which is sparsely so; thorax coarsely so; abdomen almost smooth. Ovipositor short and curved. Humeral cross nervure of hind wing broken at middle. Areolet rhomboidal, slightly petiolate.
Black.
Rufous as follows: abdomen except base of petiole, apex of clypeus, mandibles, palpi, and tegulse; apex of antennae and underside of base and pedicel; legs, except tips of hind femora, tarsal segments and outside of hind tibiae, which are dusky. Wing veins dusky except fulvous bases and spot on stigma. Four females, collected by C. T. Brues at Petersham, Mass. VII, 1918.
Prinopoda media sp. nov.
9 . Length 8 mm. Head large, thickened behind the eyes, front rather flat. Malar line one-third the basal width of mandi- bles. Distance from ocellus to clypeus one-fourth longer thin from eye to eye. Front gradually and slightly convex. Clypeus with transverse ridge near base, emarginate at apex, and indistinctly bilobed. Antennae with 39 segments. First flagellar joint longer than scape and pedicel; segments 5-25 thickened; twelfth segment three-fourths as broad as long and one-third wider than first seg- ment. Parapsidal furrows faint. Scutellum rather flat, margined anteriorly. Pleurae flat. Areola open anteriorly. Abdomen peti- olate, first segment slightly wider at apex than at base; third twice as wide as apex of first and almost as wide as thorax. Parallel carinse extending to apex of first segment. Ovipositor 2 mm., curved. Legs long, slender; claws with 4-6 long teeth. Areolet irregular, petiolate. Front finely punctured. Pronotum smooth. Lower rneso- and metapleure coarsely punctate. Propodeurn rug- ulose. Abdomen smooth, except petiole, which is faintly rugulose. Black. Yellow as follows: mandibles except teeth, clypeus, tegulse, all trochanters, anterior coxse, tips of anterior femora, tibiae, and tarsi except apices which are ferrugineous. Second and third abdominal segments, antennae beneath, anterior femora, hind cox= and hind tibiae except apices, ferrugineous. Palpi, annulus on posterior tibise, spurs and bases of tarsal segments, white. Rest of hind tibiae and tarsi black.
Female from Machias, Maine, VII, 1917.




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19191 Hall-New Tryphonince of the Tribe Ctenopelmini 159 Scopiorus plagosus sp. nov.
9 . Length 4 mm. Head as wide as thorax, slightly protuber- ant beneath antennae. Distance from eye to eye about equal to distance from clypeus to ocellus. Malar line two-thirds the basal width of mandible. Clypeus rather flat, but separated from face by groove. Antennae extending to middle of abdomen, with 24 segments; 4-12 thickened; length of first flagellar joint four times its apical width and more than that of scape and pedicel; next joint three times as long as wide and 11th segment twice as long as wide. Parapsidal furrows indicated anteriorly. Basal transverse carinse wanted on propodeum. Scutellum flat, triangular, and margined. Abdomen sessile, petiole one-fourth wider at apex than at base; third segment slightly wider than thorax. Carinse of petiole extending to rugulose transverse groove near apex. Trans- verse groove on second segment clearer laterally. Claws thickly pectinate. Ovipositor curved. Areolet wanting. Humeral cross nervure of hind wings broken below middle. Face finely punc- tured; cheeks sparsely so; thorax coarsely so, except pronotum; first two segments of abdomen rugulose.
Black.
Yellow-rufous as follows: base and apex of second and third segments, legs with the following exceptions which are black; claws, posterior coxse, bases of other coxse, hind femora (except apex) and outside of four front femora. Scape, mandibles except teeth, clypeils, face except clypeal suture and band from antennae to clypeus, narrow line on apex of segments, 3,4, and 5, yellow; tegulse and bases of veins, white.
Female from Yellowstone Park, Continental Divide, 8200 ft., collected by Prof. A. L. Melander, August 8, 1919. This is nearest to Scopiorus expansus Davis.



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