THE JUMPING PLANT-LICE OR PSYLLID^ OF THE NEW WORLD. 147 



PSYLLA AMERICANA, new species. 

 Figs. 101, 265, 318, 486, 487, 488. 



Psylla americana Crawford '11: 628 (n. n). 



Length of body 2 to 2.4 mm.; wing length 3 to 3.3; width of head 

 0.95 to 1.04. General color reddish brown to dark brown or blackish; 

 vertex reddish, sometimes whitish in center; genal cones reddish 

 at apex, paler than vertex; pronotum usually black cephalad, pale on 

 posterior margin; prsescutum whitish on posterior margin; scutum 

 often striped mth black; abdomen dark; antennas mostly dark; 

 wings clear, veins dark. 



Vertex broad, about half as long as broad, long down median hne, 

 lobes becoming narrow on each side of front ocellus, with two foveal 

 impressions; genal cones seldom as long as vertex, divergent, rather 

 acutely pointed, with short pubescence. Antennae usually about one 

 and a half times as long as width of head, sometimes a little longer, 

 rarely shorter. 



Thorax arched rather strongly, typical in form. Legs moderately 

 stout; hind tibiae slightly longer than femora, with basal spur very 

 small or wanting. Wings long, clear, transparent, rarely with a yel- 

 lowish tinge, veins black and conspicuous, venation typical; ptero- 

 stigma large, denser than adjacent membrane. 



Genitalia. — Male. — -Anal valve longer than forceps, of usual form, 

 pubescent; forceps rather long and large, usually about 0.45 to 0.50 

 mm. long, sometimes less, broadest at base and rapidly converging to 

 a narrow and acute apex. Female. — Genital segment slender, as long 

 as rest of abdomen or longer, dorsal valve very slender in apical third 

 and longer than ventral valve. 



Described from numerous specimens of both sexes from : California : 

 Claremont (Crawford), on Pinus ponderosa, June, 1911 (altitude 10,000 

 feet); Argus Mountains (Koebele), on Pinus monophylla, May, 1891; 

 Placer and Nevada Counties (Koebele), September; Banff Springs, 

 Alberta, Canada (Hubbard and Schwarz), June. 



Type in author's collection. 



PSYLLA AMERICANA MINOR, new variety. 



Very similar to species in size, coloration, and general structural 

 characters, differing as follows : Male forceps shorter and more pubes- 

 cent, seldom more than 0.30 mm. long, usually about 0.20 to 0.25 mm. ; 

 anal valve proportionately shorter and broader. Female genital 

 segment similar but usually thicker dorso-ventrally. 



Described from many males and females from Colorado (C. P. Gil- 

 lette), on Salix sp.; Boulder, Colorado (Rohwer); Berkeley, California 

 (Crawford), on Salix lasiolepsis, January, 1912; Laguna Beach, Cali- 

 fornia (Crawford), on same host, July, 1911; Los Angeles, California 



