THE JUMPING PLANT- LICE OR PSYLLIDiE OF THE NEW WOELD. 65 



h"^ Genae produced more or less conically beneath antennae, 

 c'. Pronotum long, flat, not at all depressed below level of prsescutum and vertex, 

 with an acute epiphysis in center of front margin, and a similar one on front 

 margin of prsescutum; notum nearly or quite flat; fore wings nearly or quite 



three times as long as broad, often maculated Leuronota, new genus. 



c^. Pronotum shorter, distinctly descending cephalad, depressed below head and 

 prsescutum; notum more strongly arched. 

 d^. Genal cones short and small; clypeus easily x-isible from front; vertex often 



conspicuously colored or banded Paratrioza Crawford. 



(f^. Genal cones at least moderately long, or not exceedingly short; clypeus 

 not visible from front. 

 e^. Thorax broader than width of head including eyes; genal cones more or 

 less divergent, variable in length, acute to subacute at apex. 



Trioza Forster. 



e^. Thorax narrower than width of head, or not broader; genal cones long, 



slender, acute, closely appressed and not at all divergent; hind tibiae 



with three apical spines within Neotriozella Crawford. 



<". Media and cubitus with a short petiole, or showing a distinct tendency toward 

 such a character, variable. 

 6'. Forewings elongate, nearly or fully three times as long as broad; R+M+Cu 

 relatively long; M+Cu petiole short or subobsolete, rather constant within 



a species; hind tibiae with two apical spines within CeropsyUa Riley. 



6'. Forewings short, about twice as long as broad; M+Cu petiole variable %vithin 

 a species from long to obsolete (variable even on same individual) ; hind tibiae 

 with three apical spines within Hemitrioza, new genus. 



Genus KUWAYAMA Crawford. 



Epitrioza Crawford (not Kuwayama) '11a: 452. 

 Kuivayama Crawford 'lib: 



Head small, scarcely deflexed; notum rather flat, not arched; 

 genag not produced into cones, but swollen more or less spherically 

 beneath bases of antennae; clypeus large, easily visible from in front. 

 Thorax as broad as, or broader than, head including eyes; pronotum 

 usually not depressed below head and prsescutum. Forewings 

 subacute to acute at apex; venation as in Tnoza; base of Cu 

 relatively short. 



Type of genus. — Kuwayama medicaginis Crawford. 



This genus is rather closely related to Paratrioza, as shown espe- 

 cially by K. dorsalis. The form of the genae, however, easily separates 

 the two genera. 



SYNOPSIS OF SPECIES. 



a'. Vertex rather deeply excised on each side of median line on top, margins not 

 sharply differentiated; color of body light. 

 6'. Body small, wings less than 2.5 mm. long; antennae scarcely twice as long as 

 width of head; genital segment of female about half as long as rest of abdomen. 



medicaginis Crawford. 

 6*. Body larger, wings more than 3 mm. long; antennae much more than twice as long 

 as width of head; female genital segment nearly as long as rest of abdomen. 



oaxacensis Crawford. 



a?. Vertex not excised, almost flat, with margins sharply differentiated and giving 



vertex appearance of being raised plate-like. Color of body dark; forewings 



acute at apex; notum very flat dorsalis, new species. 



