1912] Johnson — Neto and Interesting Diptera 151 



Genus Exoplectra Chevr. 

 Exoflectra 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. Pronotum 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, tibial 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 

 Muls. with which the facies and color have much in common. 

 The species however, comes close to E. ruherimmea 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. 



cf . Face and front black, orbits widely margined with brownish poUinose, hairs 

 black; antennse 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; pleurae 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 



