DipU ra from Trii 



421 



Well, Dominica (host, Vespertilio nigrieans) } Trichobius para- 

 siticus, Gerv., differs as follows from the new species : — 

 Eye-spot with about eight distinct facets. Mesonotum with 

 two rows of long bristles in Eront, remainder with minute 

 bristles which arc less numerous and smaller than I 

 T. ccbcu8 i several moderately long ones just before the 

 scutellum. Longitudinal suture not bifurcated, extending 

 nearly two-thirds of the distance from tlie front margin to the 

 transverse suture. Anterior angle of metasternura more 

 obtuse. Length 2-2 mm. 



I consider it doubtful, however, whether the Dominican 

 specimens are correctly identified, since both t hoy and the 

 Trinidad species have the front femora much less Bwollen 

 than is indicated by Gervais for T. parasiticus and Kolenati 

 for Strebfa wiedemanni. Neither of these forms shows the 

 emargination of the wing-tip, given by Speiser as a character 

 of T. parasiticus. 



Erioptera troglodyta, sp. n. 



Head dark brown ; antenna! and palpi blackish ; a white 

 spot on the front just above the base ol the antennas. Thorax : 

 mesouotum rather light brownish, somewhat darker towards 

 the margii s, but without distinct stripes. Pleura} light 



Erioptera troglodyta, $ genitalia. 



yellowish ; one broad dark brown stripe across the middle ; 

 sternopleura also dark brown. Abdomen blackish. Male 

 genitalia as figured. Legs ochreous brown ; femora with the 

 tips almost white and with a dark brown snbapical ring. 

 Wings entirely unmarked ; venation as in E. immaculata , 

 Alex. ; wing-length 3 mm. 



Allied to E. immaculata, Alex., but the coloration of the 

 thorax is quite different. Alexander placed E. immaculata 

 in the subgenus Mesocyplwna, but according to Osten-Sackeu's 

 definition both it and the new species are typical Erioptera. 



