THE JUMPING PLANT-LICE OR PSYLLID-S: OF THE NEW WORLD. 153 



PSYLLA BREVISTIGMATA Patch. 



Figs. 92, 93, 264, 308, 484. 



Psylla brevistigmata Patch '12b: 222. 



Length of body (male) 1.6 mm.; (female) 2.1; length of forewing 

 2.3 to 2.5; width of head 0.85. General color light reddish brown to 

 red, with more or less conspicuous white markings and stripes; vertex 

 with border more or less continuously white, or at least front margin 

 white; genal cones white on basal half, red distally; pronotum white 

 on posterior half; prsescutum bordered with white on hind margin; 

 scutum with longitudinal white or pale stripes; pleurae and abdomen 

 more or less variegated. These colors may sometimes be more 

 indistinct. 



Vertex broadly crescentic, front margin evenly rounded, emarginate 

 at median line, somewhat bulging on each side of front ocellus, with 

 a shallow depression discaUy on each side. Genal cones thick at base, 

 shorter than vertex, strongly divergent, roundly acute at apex, 

 pubescent. Antennae about two and three fourths times as long as 

 width of head, slender, black apically. 



Thorax rather strongly arched, broad. Hind tibias, slender, longer 

 than femora, with a small spur at base behind. Wings about two and 

 a haK times as long as broad, hyaline, slightly yellowish along veins 

 in distal third or half; pterostigma broad at base but short, less than 

 half as long as Rs. 



Genitalia. — Male. — Anal valve slightly longer than forceps, simple, 

 broad from posterior view; forceps acute at tip, arched toward each 

 other rather strongly, sides subparallel, pubescent. Female. — Genital 

 segment not as long as rest of abdomen, dorsal valve a little longer 

 than ventral and less acute at apex, with a number of short, thick 

 setae at tip. 



Described from two females (paratypes) from Alta Meadows, 

 Sequoia National Park, California (9,000 feet), July 19, 1907 (J. C. 

 Bradley) ; these paratypes are in the collection of Cornell University, 

 Department of Entomology; one male from California (no data), 

 which bears the manuscript name of Psylla albirufa Crawford; one 

 male from Santa Clara County, Cahfornia (Koebele), September, 1885, 

 on Cercocarpus parvijlorus Nuttall; six from Los Angeles, California 

 (Koebele), April; several from Santa Cruz Mountains, California 

 (Koebele); these differ sHghtly in the male forceps and may be a 

 varietal form; Siskiyou County, California (Koebele); Colorado (no 

 data). 



Whether or not certain variations in the male genitalia in these 

 forms indicate distinct species, it is difficult to say. For the present, 

 at least, these will be called merely varietal forms of the one species. 

 In size and coloration of body also there seems to be considerable 

 variation, but this is due probably to differences m local environment. 



