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NEW YORK STATE MUSEUM 



twice that of the preceding segment, more slender, the fourth a 

 little longer and more slender than the third, face yellowish. Head, 

 thorax, abdomen, pleura, coxae and basal extremity of the femora 

 all pale yellowish. Mesonotum dark brown, the narrow submedian 

 lines yellowish, sparsely haired. Scutellum and postscutellum pale 

 yellowish. Abdomen dark orange, very sparsely clothed dorsally 

 with fuscous hairs; genitalia pale yellowish. Wings hyaline, costa 

 dark brown, the wing margin and fringe unusually heavy. Halteres 

 large, yellowish basally, fuscous subapically. Legs with the coxae 

 and base of femora pale yellowish, darker apically, distal portion 

 of femora and tibiae light fuscous, tarsi dark brown, claws very 

 long, slender, strongly curved, the pulvilli one-half the length of the 

 claws. Genitalia ; basal clasp segment long, slender, terminal 

 clasp segment swollen, long, slender ; dorsal plate broad, broadly 

 rounded, ventral plate shorter, broad, broadly and triangularly 

 emarginate; harpes long, slender, tapering, obtuse. 



Fig. 24 Lasiopteryx coryli, male genitalia (enlarged, original) 



Female. Length .66 to 1 mm. Antennae not quite as long as the 

 body, sparsely haired, pale yellowish; 14 segments, the fifth sub- 

 sessile, subcylindric, stem about one-quarter the length of the basal 

 enlargement, which latter has a length two and one- fourth times its 

 diameter ; terminal segment produced, narrowly rounded apically. 

 Palpi; the first and second segments presumably short, stout, the 

 third with a length about two and one-half times its diameter, the 

 fourth one-half longer than the third, more slender. Color a pale 

 lemon yellow, the vestiture of the abdomen abundant enough to 

 give some indication of banding. Halteres dark brown. Legs pale 

 yellowish; the pulvilli apparently shorter than the claws. Ovi 

 positor short, the terminal lobes short, stout, broadly rounded. Type 

 Cecid. ai543. 



