INSECUTOR INSCITI^ MENSTRUUS 169 



Pelecotheca panamensis, new species. 



Length, 7 to 8 mm. Two females, Las Cascadas, Canal 

 Zone, Panama (Dr. A. H. Jennings). 



Dark brown or blackish, silvery-white pollinose. Antennae 

 largely fulvous. Palpi pale fulvous. Thoracic and scutellar 

 pollen with a faint golden shade, that of abdomen less so. Four 

 blackish thoracic vittae. inner pair narrow, outer pair inter- 

 ru]:)ted at suture. First abdominal segment and hind half of 

 the other segments without pollen, blackish. Legs dark brown. 

 Tegulne nearly white. Wings nearly clear, veins and especially 

 costa faintly clouded with fuscous. 



Eupelecotheca, new genus. 



Genotype, Bnpelccotlicca cclcr, new species. 



Has head of Buthclalra and axlike theca of Pelecotheca. 

 Differs from both by having median discals on the intermediate 

 abdominal segments. Arista bare, long and thin. Upper half 

 of face about as wide as one eye. Eyes thickly pilose. Pro- 

 boscis very short, the labella very large. Facialia ciliate. Two 

 strong median marginal pairs on first segment ; anal segment 

 with marginal and discal rows. Apical cell widely open well 

 before tip ; apical crossvein elongate, parallel with hind margin 

 and nearly parallel with hind crossvein, the latter approximated 

 to cubitus. Third vein bristly only at base. Abdomen elon- 

 gate-conical. 



Eupelecotheca celer, new species. 



Length, 8 mm. One female, Rock Creek, District of Colum- 

 bia, July 24, 1918 (C. H. T. Townsend). 



Dififers from Pelecotheca panamensis in color only as fol- 

 lows : Black, silvery-white pollinose. Antennse wholly black. 

 Pollen of front, thorax and scutellum, as well as that of ab- 

 domen, silvery, without golden tinge. Outer pair of thoracic 

 vittse very heavy. Legs quite black. Tegulse white. Wings 

 nearly clear, the costa not clouded. 

 Trichoduropsis, new genus. 



Genotype, Trichodura recta Schiner. 1808, Novara Dipt., 

 320-331. 



