C. W. Johnson.
New and Interesting Diptera.
Psyche 19(5):151-153, 1912.

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Johnson-New and Interesting Diptera
Genus Exoplectra Chew.
Exopleefra tibialis Muls., Rio Madeira, Brazil, 1 specimen. Exoplectra brasiliensis sp. nov.
Color: 9 blood red tinged with yellow, reflexed edges of pronotum and elytra somewhat darker, clothed throughout with a short, fine, whitish pubescence, ventral surface and legs yellowish red.
Form broadly oval, convex. Head thickly and finely punctured.
Pronoturn rather coarsely punctured, the punctures being dis- tinctly larger than those of the head. Elytra slightly more coarsely punctured than the pronotum, the punctures becoming a little deeper towards the sides. Ven- tral surface sparsely and finely punctured, the femora thickly and coarsely punc- tured, tibia1 spurs short and blunt.
Length 3.1 mm.
Width 2.5 mm.
Type in my collection.
Type locality. Rio Madeira, Brazil, 1 specimen. At first glance this species was taken for Corystis hypocreta Mu1s:with which the facies and color have much in common. The species however, comes close to E. ruberimmea Weise, from which it can be easily separated by its distinctive punctation. This species is among the most interesting of Mr. Mann's captures. NEW AND INTERESTING DIPTERA.
BY CHARLES W. JOHNSON,
Boston Society of Natural History.
Leptomydas desideratus sp. nov.
3. Face and front black, orbits widely margined with brownish pollinose, hairs black; antennae black, the terminal joint flattened. Thorax black with four grayish pollinose stripes, the two on each side narrowly connected at the transverse suture; the wide black dorsal stripe is divided by a somewhat denuded area, and divided by the suture are also two small similarly denuded subdorsal areas; pleurse black, shin- ing. Abdomen: first segment black, margined posteriorly with red with a dorsal patch of black, sides of the segment with long black hairs; second, red with an oblong black spot on each side at the lateral margin; third, red; fourth, fifth and base of the sixth, dark brown; the greater portion of the sixth and all of the seventh black; venter with the narrow posterior margin of the first and all of the second, third and fourth segments red, the others black. Legs black, basal half of the pos- terior femora red. Halteres black. Wings brownish hyaline, veins very narrowly



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152 Psyche [October
clouded kith a darker brown, the second submarginal cell is contracted anteriorly, a slight variation however in this respect is present in the two wings, see figures 1 and 2. Length, 14 mm.
One specimen, Atlanta, Ga., July 9,1910. Received from Dr. J. Chester Bradley.
Fig. 1. Leptomydas desideratus sp. nov., left and right wings. This is a very interesting species and possibly throws some light on Walker's Florida and Massachusetts records, for Mydas isopterus Wied. = Dolichogaster brevicornis Wied. It seems strange that after so many years and with the amount of collecting that has been done, that something bearing on this record should not have been found.
Minus antennae the species described could on venation and color be readily confounded with D. brevicornis. The venation of Dolichogaster as figured by Williston (Manual page 190) does not agree with the type of the genus D. brevicornis as figured by Wied- man (Mon. Gen. Midarum, pi. 53, fig. 9). Ceraturgus similis sp. nov.
Ceraturgus nigripes, Johns., PSYCHE, XVII, 228, 1891 (non Williston). 8. Face with dense yellow pollinose, mystax and beard light yellow; front black, shining with a narrow occipital margin of yellowish pollinose; occiput black, grayish pollinose, hairs black; beak black, tip red; antennae black similar to C. crwiatus but much shorter, the last joint velvety black, due to the presence of very short dense pubescence. Thorax partly covered with a yellowish pollinose, (becoming grayish behind the suture) and arranged so as to form a wide dorsal stripe and on each side two roundish spots of black, narrowly separated by a sutural line; pleurae and cox= yellowish pollinose; scutellum black with a grayish pollinose margin; metanotum shining black, sides yellowish pollinose. Abdomen black with wide yellow pollinose posterior cross-bands on all the segments, the first three not quite reaching the poste- rior margin in the middle; hypopygium shining black, obscured by long yellowish hairs. Femora black, tibiae and tarsi yellow, tips of the tibiae and tips of all the tarsal joints black. Halteres yellow.
Wings grayish hyaline, with a more brown- ish tinge the costa and extending over the outer half. Length, 12 mm.
The female is like the male in general appearance. The terminal segments are




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