302 AMERICAN PSYCIIODID^. 



are generically distributed as follows: Psychoda, 22 ; Pericoma, 13 ; 

 Trichomyia, 2; Flebotomus, 2. This does uot include Ps. degenera 

 Walker. 



In the paper recently mentioned Eaton maintains that the basis 

 upon which the inferior pair of genital appendages of the male are 

 borne, is in reality the anal segment, which dorsally is abbreviated, 

 sometimes to a hair-like loop, to make room for the opposed pair of 

 superior appendages and the intromittent parts. That the homo- 

 logue in the female is termed the subgenital plate. And that the 

 edge of the basis has been mistaken by several entomologists for a 

 basal joint of the inferior appendages viewed sideways; but that a 

 2 jointed condition of the inferior appendages is unknown in Psy- 

 chodidse. 



The writer's observations agree with Eaton's statement concern- 

 ing the single jointed condition of the inferior genital appendages 

 of the male. Some species bear a number of bristling, hair-like 

 tenticles at the tip of tlie appendages, while others have a single, 

 strong, clavate ten tide, which has been mistaken by Banks and 

 Kincaid for a terminal segment. The shape of the basis bearing 

 the inferior appendages shows very plainly in some species that it is 

 nothing other than the reduced anal segment and not fused basal 

 segments of the inferior appendages, as erroneously described by 

 Banks and Kincaid. 



In the descriptions of North American species there has appar- 

 ently been no mention made of the intromittent organ and the basis 

 of the inferior male appendages, both of which are certainly struc- 

 tures of importance. In two of the new species the thirteenth seg- 

 ment of the antennae bears a terminal spike with two or three 

 slight enlargements. Eaton considers these enlargements as distinct 

 segments, but the writer is unable to detect any segmentation what- 

 ever. In the descriptions of the new species, the following enumer- 

 ation of the wing veins has been adopted : 0, subcosta ; 1, radius ; 

 2, 3, 4, branches of radial sector; 5, median vein; 6, 7, branches of 

 forked cubitus; 8, 9, 10, anal veins; vein 4 being absent In Tricho- 

 myise. The artificial key for Pericoma is original, while that for 

 Psychoda includes the list of eastern Psychoda by Banks. The four 

 plates included contain original camera lucida drawings, and the 

 figures of the life history material were drawn largely from living 

 specimens. 



