110 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



pubescent. Eyes large, extending back over propleurites ; anterior 

 ocellus large, prominent. Antennae short and stout. 



Thorax very large and robust, broad, very strongly arched, very 

 coarsely punctate and pubescent. Pronotum long, subvertical, 

 extending laterad to middle of eyes; lateral margin straight; pro- 

 pleurites rather long. Prsescutum large, arched rather strongly. 

 Wings very large, whitish and partially subhyaline, maculate; about 

 two and a half times as long as broad, rhomboidal, rather acute at 

 apex; costal margin nearly straight; marginal cells long, first longer 

 and larger than second, of similar shape ; pterostigma long, distinct, 

 almost as long as subcostal cell; basal vein elevated on a distinct 

 callus; veins set with a double row of setae. 



Genitalia. — Male. — Genital segment large, conspicuous; forceps 

 relatively not long, simple, stout, tapering to apex. Anal valve long, 

 front margin arcuate, posterior margin bulging roundly over middle 

 two- thirds, emarginate subapically; pubescence long. Female. — 

 Genital segment fully as long as rest of abdomen, or slightly longer, 

 acute at apex, narrow; dorsal valve longer than ventral. 



Described from several males and females from Dallas, Texas (E. S. 

 Tucker); Colorado (Gillette); Kansas (no data). An examination of 

 a paratype of Miss Patch's P. iridentata shows it to be identical with 

 venusta; ''Canon City, Colorado, on Celtis," is the data accompanying 

 her description of this species. 



The gall is large and spherical, about 1 cm. m diameter, woody, 

 poly thalamous ; found on twigs and petioles of Celtis occidentalis, 



PACHYPSYLLA C.-MAMMA Riley. 



Figs. 64, 242. 452. 



Pachypsylla celtidis-mamma Riley '76:425; '83:73; Canad. Ent. 15:158. — Packard 



'90:619.— Beutenmullee '92:275; '04:35.— Cook 

 '03:42G; '04:844.— Jarvis '06:65.— Ste bb ins 

 '10:33.— Mally '93:131-138; 'Stough '10:121-165 

 (anatomy). 



Length of body 2.4 mm. ; length of forewing 2.8 ; width of head 1 .04. 

 General color reddish brown to light brown, very little variegated. 

 Body moderately large, robust. 



Head large, not as broad as thorax; vertex straight on posterior 

 margin, somewhat rugoso-punctate, not converging toward front, 

 rounded downward toward front, finely pubescent, with a small fovea 

 on each side of median line in rear center; genal cones short, small, 

 subacute, divergent, extending slightly forward from plane of vertex 

 and depressed and separated therefrom. 



Thorax large, very broad and strongly arched, coarsely punctate 

 and pubescent. Pronotum long, not quite vertical, lateral margin 

 straight, short; propleurites rather short; praescutum long and 

 broad. Wings moderately large, whitish, scarcely hyaline, covered 



