114 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



Tribe EUPHYLLURINI. 



The most characteristic features of this tribe are the rhomboidal 

 wings and the form of the genal lobes in front of the vertex. Two 

 species of a new genus, Kataceplidla, are closely enough related to 

 EwpJiyllura to be included in the same tribe although there are 

 marked differences between the two. 



It is interesting to note that KatacepJiala bears certain marked 



resemblances to the Pachypsyllini, while EupTiyllura grades off into 



Euphalerus on the other side. With these intermediate forms before 



us it is easy to see the relationships of the various genera of this 



subfamily. 



KATACEPHALA, new genus. 



Head and pronotum perpendicularly inclined; vertex large, con- 

 verging roundly toward front; genal lobes transverse, contiguous on 

 inner margin, thicker than in Euphyllura, scarcely differentiated from 

 vertex. Antennae not much longer than width of head. Vertex and 

 thoracic dorsum conspicuously pubescent. Thorax broad, and 

 strongly arched. Legs very short. Wings rhomboidal, but much 

 more hyaline than in EupTiyllura; venation similar to latter; veins 

 setigerous. 



Type of genus. — Katacephala grandiceps, new species. 



SYNOPSIS OF SPECIES. 



a*. Wings very strongly rhomboidal; antennae not longer than width of head; head 

 not retrose ^ grandiceps, new species. 



a^. Wings with rhomboidal angles more rounded; antennae distinctly longer than 

 width of head ; head retrose arcuata, new species. 



KATACEPHALA GRANDICEPS, new species. 



Figs. 120, 121, 126, 127, 416. 



Length of body 2 mm; length of forewing 2.7; width of head 1. 

 General color brown to yellowish brown; eyes and genal lobes of 

 male dark brown to black. Entire body surface clothed with a con- 

 spicuous pubescence. Body very stout, not large. 



Head vertical, lying closely against prothorax and forecoxse, as 

 broad as thorax; vertex broader than long, anterior margin roundly 

 arcuate, with an arcuate fossal depression parallel with front margin 

 reaching about half way to the front. Genal lobes large, very thick, 

 rounded in front, broader than long, lying against forecoxse. Anten- 

 nae inserted between eye and genal lobe, about as long as width of 

 head, black at tip. Eyes touching mesopleurae; anterior ocellus at 

 base of genal lobes, apparently remote from front margin of head. 



Thorax broad, high; pronotum mostly covered by eyes; prse- 

 scutum, scutum, and scutellum very large; pleurites large. Wings 

 rhomboidal, semi-hyaline, slightly rugulose, almost twice as long as 



