THE JUMPING PLANT-LICE OR PSYLLID^ OF THE NEW WOELD. 101 



acute at apex; basal vein (R +M + Cu) relatively longer than in most 

 species of the genus Trioza, distinctly more than one-fourth the length 

 of the wing (very long in sideroxyli) ; M and Cu sometimes petiolate 

 at base, or with a distinct tendency toward such a character. 



Type of genus. — Geropsylla sideroxyli Riley. 



The two species of Triozoida Crawford ('lib: 491) are closely 

 enough related to Riley's species to justify placing them in the same 

 genus and making Triozoida a synonym of Geropsylla. The long basal 

 vein (unusually long in the type-species), the type of origin of M and Cu 

 with the tendency toward becoming petiolate, the general appearance 

 of the vertex and genal cones all denote a mutual relationship. This 

 was overlooked at the time of erecting the genus Triozoida, but since 

 then specimens of G. sideroxyli have become available for comparison, 

 and, therefore, this change is made. 



SYNOPSIS OF SPECIES. 



a}. R+M+Cu longer than Rs; genal cones short, scarcely half as long as vertex; 

 vertex very conspicuously bulging in front; M and Cu scarcely petiolate. 



sideroxyli Riley. 

 a}. R+M-f Cu shorter than Rs; genal cones nearly or fully as long as vertex. 

 ¥. M and Cu scarcely or only slightly petiolate; clypeus subglobose; genal cones. 



as long as vertex; antennae whitish on basal third calif ornica Crawford. 



6^. M and Cu distinctly petiolate; clypeus elongate, vertical, nearly as long as genal 

 cones and similar in shape; genal cones not quite as long as vertex; antennae 

 black from base to tip johnsonii Crawford. 



CEROPSYLLA SIDEROXYLI Riley. 



Figs. 138, 407. 



Ceropsylla sideroxyli Riley '83: 76. 



Length of body 2.1 mm; length of forewing 2.9; width of head 

 0.74. General color greenish yellow on the upper side, abdomen and 

 venter green; praescutum brownish on anterior half or two- thirds; 

 head with a black area between antennae, extending up around front 

 ocellus and including genal cones ; antennae brown, greenish on basal 

 half. 



Head much narrower than thorax; vertex with posterior ocelli 

 greatly elevated, rest of surface smooth, almost fiat, a Uttle more than 

 half as long as broad between eyes, emarginate in front at median 

 line (when viewed dorsally) ; view from in front shows vertex acutely 

 angled downward with a subcircular elevated area around front 

 ocellus; antennal sockets and genal cones more inferior than in 

 Trioza; cones small, between and below antennal sockets, almost 

 parallel to each other, vertical, blunt at apex, with a few long setae. 

 Eyes large. Antennae not over twice as long as width of head, flat- 

 tened and broadened at apex. 



Thorax arched rather strongly, broad, finely strigate. Pronotum 

 short; mesopleurites large; legs moderately stout. Wings long, 



