156 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



PSYLLA CERASI Patch. 



Psylla cerasi Patch '12b: 223. 



Very close to astigmata, differing chiefly in being very strikingly 

 red to Vermillion in color instead of greenish; "head and thorax rosy, 

 dorsal abdomen almost vermiUion, a black spot on dorsmn of first 

 abdominal segment, five vivid transverse black bands across abdomi- 

 nal dorsum, the last coming just cephalad the genital segment. 

 Antennal joints I to III rosy, rest black: eyes bright black: wings 

 clear and a little brownish, ventral body pale." (Patch '12b: 233.) 

 The one paratype ( ?) which Miss Patch has kindly loaned to me does 

 not show these color characters, since it has been mounted in balsam. 

 Vertex and genal cones resembling more closely astigmata than tri- 

 maculata. Wings very large; medial vein closer to radial sector 

 than in astigmata. 



Described from one female (paratype ?), in balsam, from Stillwater, 

 Maine (Patch), on wild cherry {Prunus cerasus ?), September 14, 

 1911. The eggs, supposedly of this species, were found on the same 

 date between the leaf buds and twigs. 



More biological data or more extensive collections wiU be necessary 

 before the true relationships of this and the two preceding species can 

 be ascertained. It is possible that aU three will prove to be but 

 variations of one species. 



PSYLLA ALNI AMERICANA, new variety. 

 Figs. 4, 10, 11, 15, 85, 89, 260, 307, 310, 477. 



Length of body (male) 3 mm.; (female) 3.8; length of forewing 4.3; 

 width of head 1.08. General color yellowish green, antennae black or 

 brown distally. 



Similar to jloccosa but vertex relatively shorter, only about one- 

 third as long as broad, as long as pronotum; genal cones short, about 

 as long as vertex or often distinctly shorter, broadly rounded at apex 

 or sometimes broadly subacute, pubescent. Antennae nearly or fully 

 three times as long as width of head. Basal spur of hind tibiae usually 

 large and conspicuous. Wings typical in form and venation; ptero- 

 stigma large, sometimes moderately narrow; wings clear, sometimes 

 slightly flavous. 



Genitalia.— Male. — Anal valve long, converging to a narrow apex; 

 forceps long, narrow, broadened in apical tliird or fourth (from side 

 view), apex truncate, either straight or sHghtly emarginate on trun- 

 cate margin. Female. — Genital segment slender, usually longer than 

 rest of abdomen, dorsal valve longer than ventral. 



Described from several hundred specimens of both sexes from: 

 Claremont, Cahfornia (Crawford), July, 1911, on Alnus rhomUfolia; 

 Stanford University, California (Crawford), on same host, September, 

 1911, and May, 1912; Visalia, California (J. C. Culbertson); Ormsby 



