THE JUMPING PLANT-LICE OR PSYLLID^ OF THE NEW WORLD. 91 



TRIOZA SALICIS Mally. 



Figs. 191, 195, 196, 202, 335, 337, 341, 364, 387, 516, 525, 526, 530. 



Trioza salicis Mally '94:161. — Crawford '11a: 432. 



Trioza assimilis Crawford '10a:233; '11a: 438; 'llb:503 (name changed io fiori). 



Trioza Jlori Crawford 'lib: 503 (footnote). 



Trioza pomonse Aulmann '13:51. 



Trioza dubia. Patch '12b: 226. 



Trioza nigra Crawford '10b: 358; 'lib: 503 (changed to nigrilla). 



Trioza Zom'sian* Aulmann '13:48. 



Trioza minuta Crawford and var. similis Crawford '11a: 432, 433. 



Very similar to maura in size and proportions; color similar, except 

 vertex and cones typically dark to black, occasionally light; abdo- 

 men not white ventrad. Most of the structural difference are slight 

 and difficult to describe. Vertex lobately swollen in front on each 

 side of median line, more coarsely punctate. Wings similar, subacute 

 to narrowly rounded at apex, seldom flavous, usually clear, anal 

 angle seldom dark. 



Genitalia. — Male. — Anal valve similar, but caudal prolongations 

 shorter, sometimes shorter than broad; forceps often shorter. 

 Female. — Genital segment twice as long as in maura, slender, acute, 

 dorsal valve longer than ventral. 



Described from many specimens of both sexes from the following 

 localities: Ames, Iowa (Mally), September to December, 1894, on 

 Salix sp.; Stanford University, Cahfornia (Crawford), September, on 

 Salix lasiolepis; Santa Clara County, Cahfornia (Baker); Leona 

 Heights, Alameda County, Cahfornia (J. C. Bradley), August; Placer 

 County, California (Koebele), October (these are labeled Trioza 

 pyrifolise^ (?) Forbes: Ormsby County, Nevada (Baker); Colorado; 

 Easton, Washington (Koebele); District of Columbia, August 24, 

 1899. 



I have examined three paratypes (one male and two females) of 

 T. dubia Patch, and find this species to be identical with salicis. 

 These specimens are from San Francisco, California (Bradley) The 

 similarity between _^on and salicis was noticed in the preparation of 

 the previous papers, but no males of salicis were then available and 

 therefore the identity of the species could not be established. The 

 Iowa forms have relatively shorter genal cones than the western 

 forms and less divergent, but I believe this is only a minor variation. 



TRIOZA VARIANS Crawford, 



Figs. 194, 369, 523. 



Tnoza rianans Crawford 'lOac: 231; '10bc:361; 'lie: 628. 



Similar in size and general proportions to maura. Color characters 

 conspicuous: general color brown to black; vertex dark with a broad 

 yellow border; cones dark; pronotum orange; praescutum orange on 



1 1 have been unable to obtain authentic specimens of this species, and have not included it in the 

 synoptic table of species. 



