106 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



SYNOPSIS OF GENEEA. 



a'. Vertex quadrate, flat, very large, perpendicularly inclined, or nearly so; wings 



seldom ovate Tribe Pachypsyllini. 



6'. Praesciitum, pronotum and vertex perpendicularly inclined; wings very long, 



rhomboidal, subhyaline Uhleria, new genus. 



6-. Only the head and sometimes the pronotum perpendicularly inchned. 

 c'. Wings subhyaline, not rhomboidal; antennae distinctly longer than width of 



head; genal cones rather large Tetragonocephala, new genus. 



c^. Wings thick, opaque, more or less rhomboidal; antennae short; genal cones 

 small; vertex often not quite perpendicular, broadest at apex; insects gall- 

 forming Pachypsylla Riley. 



d^. Vertex not quadrate, ixarrowed distinctly anteriorly, not perpendicularly inclined, 

 but sometimes strongly descending. 

 6'. Forewings strongly rhomboidal, usually thickened and opaque; vertex flat; 

 genae produced into two transverse contiguous lobes on same plane with vertex. 



Tribe Euphyllurini. 

 c'. Head and pronotum vertically inclined; eyes not covering prop leurites; wings 

 only semiopaque; dorsal head and thorax pubescent. 



Katacephala, new genus, 

 c^. Head deflexed, but not perpendicularly inclined; eyes receding strongly, 

 covering propleurites; wings opaque; head and thorax not pubescent. 



Euphyllura Forster. 

 fc^. Forewings elongate-ovate, sometimes with a rhomboidal tendency (see Eupha- 

 lerus j>ropinquus), usually hyaline or subhyaline, rarely opaque; genal cones 

 not as above, 

 c^ Pleural suture of prothorax extending to middle of lateral extremity of pro- 

 notum, which is more or less swollen and knob-like; propleurites subequal 



in length (see fig. 1) Tribe Arytainini. 



d}. Vertex large, flat, more or less as in Euphyllura, with eyes strongly recessive; 

 genal cones with vertex forming a uniformly flat surface; wings often 



subopaque. Euphalerus Schwarz. 



cP. Vertex smaller, less flat, with eyes less recessive; genal cones not as above; 

 wings usually subopaque to hyaline. 

 e^. Genal cones rounded at apex, not acutely conical, more or less parallel to 

 plane of vertex; vertex bulging on each side of median line; thorax 



usually less strongly arched Arytaina Forster. 



e-. Genal cones acutely conical, perpendicularly inclined; vertex not bulging 

 in front on each side of median' line; antennae rather long; wings 



hyaline; thorax well arched Psyllopsis Loew. 



c*. Pleural suture of prothorax extending obliquely to posterior part of lateral 

 extremity of pronotum, or not attaining to it at all ; episternum longer than 



epimeron Tribe Psyllini. 



d}. Vertex with a longitudinal, whitish ridge along each side of median line, 



with a furrow outside of and between the two ridges; genal cones short 



and usually separated at base; antennae long. . . . Mitrapsylla, new genus. 



(P. Vertex rtrithout such ridges and furrows; genal cones various, usually 



conical Psylla Geoffroy. 



Tribe PACHYPSYLLINI. 

 UHLERIA, new genus. 



Head, pronotum, and praesciitum perpendicularly inclined, with 

 meso thorax exceedingh^ thick dorso-ventrally and anterior part of 

 head about on same level with the ventral surface of mesothorax; 



