148 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



(Koebele), on Scdix calif ornica, April; Fieldbrook, California (Bar- 

 ber), May 31, 1903. Some of these specimens bear the manuscript 

 name of Psylla rufula Riley. 



Type.— C&t. No. 18109 U. S. Nat. Mus 



PSYLLA AMERICANA FLAVA, new variety. 



Very close to the species and similar in general structural characters, 

 but diflFering in color chiefly; color conspicuously lighter; dorsum with 

 indistinct stripes or none at all; genal cones uniform in color; wings 

 whitish, veins yellowish instead of black. The genitalia of the male 

 resemble those of the variety minor of the species; the female genital 

 segment is variable from slender to rather thick. 



Described from numerous males and females from Utah: Park 

 City, Alta and Utah Lake, collected by Hubbard and Schwarz, in 

 June; Victoria, Vancouver, British Columbia (Hubbard and Schwarz), 

 June; Oregon (Koebele); Santa Clara County, California (Baker); 

 Los Angeles, California (Coquillett) ; Pagosa Springs, Colorado 

 (Baker). Some of these bear the manuscript name of Psylla ameri- 

 cana longipennis Crawford. 



Type.— Cat. No. 18110, U. S. Nat. Mus. 



PSYLLA RIBIS Patch. 



Psylla ribis Patch '12b: 222. 



Similar in size and general appearance to americana, and especially 

 the variety minor; differing as follows: Genal cones less acute, not 

 tipped with a darker shade than that of base; antennae shorter than 

 average of americana; wmgs similar; pterostigma large, yellow. Male 

 anal valve very elongate, more than twice as long as forceps, con- 

 verging a little toward apex, straight; forceps rather broad and 

 thick, flexed forward midway, sides subparallel, apex truncate. 

 Female genital segment similar but somewhat thicker. 



Described from one male, mounted in balsam (paratype?), from 

 Colorado (no data), and one female, in balsam, from Orono, Maine 

 (Patch), June, 1910. Both specimens were kindly loaned to me by 

 Miss Patch. 



PSYLLA QUADRILINEATA Fitch. 



Psylla quadrilineata Fitch '61:65. — Riley '84:69.^Provancher '86:305. — ^Lintner 



'93:64. 

 Psylla gillettei Patch '12b: 221. 



Very closely related to americana, both in structure and color 

 characters, differing as follows: Vertex different in shape, relatively 

 broader and shorter; antennae relatively longer, nearly twice as long 

 as width of head. Wings with a conspicuous black spot at tip of 

 clavus; pterostigma much smaller. Male forceps narrower at base. 

 Female genital segment thicker dorso-ventrally. 



