1 68 NEW YORK STATE MUSEUM 



Larva. Length 1.5 mm, pale yellowish, rather stout. Head 

 small; antennae short, tapering, uniarticulate ; breastbone distinct, 

 bidentate, the teeth triangular, well separated, the shaft tapering 

 posteriorly. Skin coarsely shagreened, posterior extremity broadly 

 rounded, slightly lobed and with the cuticular rugosities more 

 pronounced. 



Male. Length .75 mm. Antennae dark brown, yellowish basally; 

 14 segments, the fifth with a length one-half greater than its diameter, 

 subbasal whorl sparse, subapical whorl rather thick, relatively 

 long, circumfili at the basal half and apically; terminal segment 

 narrowly oval, tapering distally, with a length twice its diameter. 

 Palpi yellowish; first segment short, stout, second narrowly oval, 

 with a length three times its diameter, the third a little longer, 

 more slender, the fourth longer and more slender than the third. 

 Mesonotum a light fuscous yellowish, the submedian lines sparsely 

 haired.- Scutellum and postscutellum yellowish orange. Abdomen 

 yellowish orange, the segments slightly fuscous dorsally. Wings 

 hyaline, the third vein uniting with the dark brown costa near 

 the basal half. Halteres pale yellowish. Coxae, femora and tibiae 

 mostly yellowish, the tarsi dark brown; claws long, slender, evenly 

 curved, the pulvilli about half the length of the claws. Genitalia; 

 basal clasp segment long, slender; terminal clasp segment rather 

 stout, curved; dorsal plate long, deeply and narrowly incised, ventral 

 plate inconspicuous. Harpes expanded basally, tapering to a 

 narrowly produced, irregular apex. Type Cecid. a i860. 



Lasioptera viburni Felt 



1907 Felt, E. P. N. Y. State Mus. Bui. no, p. 104; separate, p. 8 



1908 N. Y. State Mus. Bui. 124, p. 327 



This male was taken at Albany, N. Y., June 10, 1906 on maple 

 leaved arrowwood, Viburnum acerifolium. 



Male. Length 1 mm. Antennae dark brown; at least 18 and 

 probably more segments, the fifth with a length a little greater 

 than its diameter. Palpi; the first segment irregularly curved, 

 subrect angular, with a length four times the diameter, the second 

 shorter, narrowly oval, the third a little longer than the second, 

 more slender, the fourth one-half longer than the third, more slender, 

 curved; eyes margined posteriorly with silvery white. Mesonotum 

 dark brown, margined laterally with yellowish, anteriorly with 

 a few sparse, silvery white hairs, submedian lines yellowish. 

 Scutellum and postscutellum nearly uniform fuscous orange. 

 Abdomen yellowish orange, with irregular fuscous markings on the 

 first, second, third and fourth abdominal segments, the markings 

 nearly divided in the middle and slightly prolonged sublaterally. 

 Genitalia shining brown. Wings hyaline, costa basally and the 

 third vein thickly clothed with dark brown scales, the latter uniting 

 with the margin at the distal third; halteres yellowish transparent. 

 Coxae, femora and tibiae pale yellowish straw, tarsi nearly uniform 



