THE JUMPING PLANT-LICE OR PSYLLID^ OF THE NEW WORLD. 113 



subparallel basally, rhomboidal apically, rather narrowly rounded 

 at apex; marginal cells shorter than in typical species, but of similar 

 form, first shorter than second; pterostigma short, indistinct; veins 

 with double row of setae; one specimen presents the anomaly of 

 the entire absence of the second marginal cell in one forewing and 

 the reduction of it to a very small cell in the other. 



Genitalia. — Male. — Genital segment short; forceps rather small, 

 simple; anal valve rather large, tapering roundly to apex on both 

 margins. Female. — Genital segment about as long as rest of abdo- 

 men, dorsal valve longer than ventral. 



Described from several males and females from Brownsville, 

 Texas (Jones and Pratt), on Celtis, March 20, 1906; Corpus Christi, 

 Texas (F. C. Pratt), April 13, 1906; Natchitoches, Louisiana (Cush- 

 man, and Pierce), on Cratxgus, March 28, 1907; Cadet, Missouri, May, 

 1885; Des Moines Kiver, Iowa (Mally); Virginia; Washington, Dis- 

 trict of Columbia (Schwarz) , June 1 . The record on Cratsegus is the 

 only instance of any member of this genus occurring on anything 

 except Celtis. 



This and the three following species differ from the others in 

 having the body smooth instead of pubescent, but this scarcely 

 warrants the recognition of a subgenus or a distinct genus, although 

 Riley did place c. -gemma in the subgenus Blastopliysa. 



PACHYPSYLLA DUBIA Patch. 

 Pachypsylla dubia Patch '12b: 224. 



I have examined a paratype of this and the following species and 

 both seem to be distinct from c.-gemma, though closely related. The 

 chief difference is in the mottled appearance of the forewing instead 

 of being uniformly brown. 



Seven paratypes in the collection of Cornell University, but the 

 locality is not given for any of them. 



PACHYPSYLLA PALLIDA Patch. 

 Pachypsylla pallida Patch '12b: 225. 



Similar to c.-gemma in characters of head and thorax and shape of 

 wings; color of wings somewhat resembling that of c.-mamma, with 

 a clear, transverse, oblique band subapically and spotting on each 

 side of band; this color, however, is less marked than in c.-mamma. 



Described from one paratype from Arizona (no data). 



PACHYPSYLLA INTENERIS Mally. 

 Pachypsylla inteneris Mally '93: 138. 



Closely related to c. -gemma, but differing in color and venation, as 

 described in synoptic table. The characterization there is taken 

 almost verbatim from Mally's short description, and it need not be 

 repeated here. I have seen no specimens of this species. 



Locality. — Ames, Iowa (C. W. Mally), on Celtis sp. 



