THE JUMPING PLANT-LICE OR PSYLLIDiE OF THE NEW WOELD. 109 



c^ Body moderately large, seldom less than 3 mm. long to tip of folded wings. 

 Gall mammiform, on under side of leaf, more or less pubescent, concave 



on upper side of leaf c.-raavnna Riley. 



<P. Body small, seldom over 2.5 mm. to tip of folded wings; gall blister-like on 

 both sides of the leaf, raised only slightly above surface of leaf. 



c.-vesiculuvi Riley. 

 6^. Vertex and dorsum not pubescent; forewings more rhomboidal, not much over 

 twice as long as broad, more or less wrinkled. Galls on petioles or small 

 twigs. 

 c'. Pterostigma indistinct, not black; head and thorax more or less flavous. 



<P. Forewings uniformly brownish c.-gemma Riley. 



(P. Forewings finely mottled in apical portion dubia Patch. 



<p. Forewings mottled and spotted, with an oblique, clear band subapically. 



pallida Patch, 

 c^. Pterostigma black, prominent; head and thorax black, marked with flavous; 

 marginal cells less narrow than in other species, the first shorter and more 

 V-shaped than second; antennae black; wings with a smoky band along 

 anal and apical margins and extending along branching of veins toward 

 base. Galls oblong-oval, located on twigs or base of larger limbs just 

 beneath the bark. inteneris Mally. 



The following species are too closely related to c.-mamma and 

 c.-vesiculum to be easily distinguishable and have not been included 

 m the synopsis: 



c.-astersicus'RiLEY '90:618.— Tucker '07:69. 



c.-cucurbita'RihEY '90:621. — Beutenmijller '92:276. — Stebbins '10:33. 



c.-globulus Riley '90:621. 



c.-minuta Riley (MS?).— Tuckek '07:69. 



c.-pubescens Riley '90:620. 



c.-umbilicus Riley '90:619. 



rohweri Cockerell '10:180. 



PACHYPSYLLA VENUSTA Osten Sacken. 

 Figs. 65, 66, 255, 451. 



Psylla venusta Osten Sacken '61:422. 



Pach/psylla venusta HiLEY '83:72. — Beutenmuller '92:274. — Mally '93:137. 



Pachy psylla c.-grandis Riley '83:70. 



Pachypsylla tridentata Patch '12b:224. 



Length of body 4.4 mm. ; length of forewing 5.1 ; width of head 1.2. 

 General color brown to brownish yellow, of ten more or less variegated 

 with darker brown; thorax \vith longitudinal stripes. Body very 

 large and massive. 



Head vertical, large, with eyes much narrower than thorax; vertex 

 very coarsely rugoso-punctate, straight on posterior margin, not 

 converging toward front, rounded forward between anterior ocellus 

 and posterior margin but not between eyes, quite coarsely pubescent, 

 with a small fovea on each side of median line, otherwise plane; 

 anterior margin slightly arcuate. Genal cones short, small, subacute 

 at apex, projecting slightly forward from plane of vertex and sharply 

 depressed and separated therefrom, distinctly divergent, slightly 



