94 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



two apical spines on the inner side is based on its resemblance to 

 certain species with this character. 



Head about 0.82 mm broad, more than half as long as broad; genal 

 cones scarcely two-thirds as long as vertex, acute to subacute, 

 divergent, pubescent. Antennae about one and a half times as long 

 as width of head, rather thick. Wings rather slender, about 3.2 mm 

 long, broadly angulate at apex, with a tinge of flavous; veins yellow; 

 venation typical. 



Genitalia. — Male. — Anal valve large, with a pair of very long, 

 lobate processes extending caudad and somewhat upward, from 

 basal two-thirds of valve; with many very long hah's at end of proc- 

 esses; forceps rather long, constricted subapically, apex enlarged. 

 Female. — Genital segment longer than preceding ventral sclerite, 

 but not as long as the two preceding, acute at apex, dorsal valve 

 a little longer than ventral. 



Described from portions of one male and one female (paratypes?), 

 mounted in balsam; locahty: Aylmer, Ottawa, Ontario, Canada 

 (W. Metcalfe), on "Bilberry," May 20, 1906. 



TRIOZA ALACRIS Flor. 



Figs. 137, 421. 



Trioza alacris FhOR '61:380, 386, 393, 398.— Loew '82:230; '86:160; '88:22.— 

 OsHANiN '07:372.— DicKEL '05:402.— Thomas '91:92.— Crawford 

 '12a:86.— SuLC '12:49. 



Trioza lauri Targioni-Tozetti, Resocont. Soc. Ent. Ital., 1879:19. 



Length of body 1.9 mm; length of forewing 3.2; width of head 

 0.71. General color greenish yellow to light brown ; dorsum in darker 

 individuals more or less striped and streaked with brown; abdomen 

 often brown; antennae black at tip. 



Head nearly as broad as thorax, not strongly deflexed; vertex 

 more than half as long as broad; emarginate in front at median line, 

 with a prominent sulcate impression on each side of median line and 

 parallel to it; genal cones scarcely two-thirds as long as vertex, 

 divergent, subacute, pubescent, not much depressed from plane 

 of vertex. Antennae about one and a third times width of head, 

 slender. 



Thorax not broad, well arched, punctate; pronotum moderately 

 long, not strongly depressed; praescutum rather large. Legs slender; 

 hind tibiae with two black spines at apex on inside and one outside. 

 Wings long, slender, transparent, fully three times as long as broad, 

 subacute at apex; R.s short. 



Genitalia. — Male. — Anal valve a little longer than forceps, hind 

 margin arcuate, with long pubescence; forceps rather stout, sides 

 almost parallel (from side), terminating in a subacute, black point at 

 apex. Female. — Genital segment nearly as long as rest of abdomen, 



