138 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



¥. Wings clear; genal cones not separate at base and not strongly 

 divergent. 

 i^. Color of body whitish; wings without black spot at tip of clavus. 



alha, new species. 



t^. Color of body flavoxis to reddish brown, with dark markings on 



thoracic dorsum; wings with a prominent black spot at tip of 



clavus pyricola Forster (summer form). 



g^. Body larger, more than 3 mm. long to tip of folded wings, usually more 

 nearly 4 mm. 

 A'. Female genJ.tal segment short, less than half as long as rest of abdo- 

 men; antennae nearly twice as long as width of head; wings 



fumate pyricola Forster (winter form). 



Ji^. Female genital segment as long as rest of abdomen, or nearly so. 

 a'. Antennae nearly twice as long as width of head; dorsal valve of 

 female genital segment downcurved; wings yellow. 



hartigii Flor, 

 -?. Antennae variable from one and one-fourth to one and three- 

 fourths as long as width of head ; dorsal valve of female genital 

 segment not downcurved; wings variable in color. 

 /. Wings with a black spot at tip of clavus. . .quadrilineata Fitch. 

 j^. Wings without black spot at tip of clavus. 



k^. Body reddish brown to blackish; wing veins black. 



P. Genal cones reddish or orange at tips; male anal valve 

 not much longer than forceps; forceps converging to 

 apex. 

 m}. Male forceps large, .45 to .50 mm long; female genital 



segment very slender americana, new species. 



m^. Male forceps smaller, .25 to .30 mm long, more densely 



pubescent; female genital segment stouter at base. 



americana minor, new variety. 



P. Genal cones unicolorous to tip; male anal valve more than 



twice as long as forceps; forceps broad, flexed, apex 



broadly truncate ribis Patch. 



P. Body light flavous to orange; wing veins flavous; genal cones 

 not darker at tip ; male forceps about as long as in americana 



minor americana fiava, new variety. 



<?. Hind tibiae with a distinct spur at base behind ; pterostigma long. 

 d}. Female genital segment not as long as rest of abdomen, not very large; genal 

 cones not quite as long as vertex; antennae scarcely one and a half times 



as long as width of head alaskensis Ashmead. 



d?. Female genital segment elongate, longer than rest of abdomen, or at least as 

 long; antennae nearly twice as long as width of head, 

 g'. Genal cones longer than vertex; female genital segment unusually large 



and thick magnicauda, new species. 



e*. Genal cones not as long as vertex; female genital segment not unusually 



large, more elongate and acute at end striata Patch. 



6^. Antennae more than twice as long as width of head; body usually larger than in 

 preceding species. 

 cK Female genital segment longer than rest of abdomen; pterostigma usually 

 small, 

 rf'. Genal cones acute or subacute at apex as long as vertex or longer; Cuj not 



strongly arched carpinicola, new name. 



d^. Genal cones broadly rounded at apex, only a little divergent, about as long 

 as vertex; Cuj more strongly arched cephalica, new species. 



