THE JUMPING PLANT- LICE OR PSYLLID^ OF THE NEW WORLD. 129 



Head moderately deflexed, almost as broad as thorax; vertex 

 almost semicircular in outline, conspicuously emarginate in front at 

 median line and bulging roundly on each side of this. Genal cones 

 about one-thu'd as long as vertex, divergent, narrowly rounded at 

 apex, pubescent, considerably below plane of vertex but extending 

 parallel to it. Clypeus moderately large. Antennae not much longer 

 than width of head, slender. 



Thorax long; pronotum long and rather flat transversely; pro- 

 pleurites very short and small. Wings a little less than two and a 

 half times as long as broad, broadly rounded at apex; hyaline, 

 slightly rugose, fumate more darkly at apex. 



Genitalia. — Male. — Genital segment rather small; forceps moder- 

 ately small, deeply bifurcate at apex, the two processes slender, acute, 

 parallel, the posterior one a little longer than the other. Anal valve 

 small, broad at base when viewed from behind. Female. — Genital 

 segment very short, dorsal valve longer than ventral, ventral very 

 short ; both acute. 



Described from many males and females from Williams, Arizona 

 (Barber and Schwarz), July; American Forks, Utah (Hubbard and 

 Schwarz), on Purshia tridentata, June 23. These bear the manuscript 

 name of Brachypsylla pursJiise Schwarz. 



Type.— Cat. No. 18102, U. S. Nat. Mus. 



ARYTAINA AMORPHiE Mally. 



Figs. 53, 235, 2S9, 441. 



Psylla amorphx Mally '94:159. 



Psyllopafloridensis Crawford '11c:629; '12b. 



Psyllopa ilicis Crawford (not Ashmead) 'lie: :629; '12b. 



Length of body 1.4 mm. ; length of forewing 1.8; width of head 0.69. 

 General color light greenish yellow throughout. Body very small, 

 not very robust. 



Head small, deflexed, about as broad as thorax, punctate. Vertex 

 arcuate on posterior margm, elevated on postocellar regions, with a 

 distinct fovea and sulcate impression on each side of median line. 

 Genal cones very short, broad, broadly rounded at apex, sharply 

 depressed below vertex, slightly pubescent. Eyes relatively large. 

 Antennae short, not twice as long as width of head. 



Thorax relatively long, well arched, coarsely punctate. Pronotum 

 small, short. Praescutum long, arched. Wings small, subcoriaceous, 

 whitish, semitransparent, not maculate, about two and two-thirds 

 times as long as broad, sides subparallel, quite broadly rounded at 

 apex, very slightly rhomboidal; first marginal cell a little larger than 

 second; pterostigma long, three-fourths as long as radial sector. 



Genitalia. — Male. — Genital segment relatively moderately large. 

 Forceps short and thick, with a large lobate process projecting 



