REPORT OF THE STATE ENTOMOLOGIST I918 9I 



stems one and one-half and two times their diameters, respectively; 

 terminal segment with the distal enlargement produced, having a 

 length nearly twice its diameter and a short, stout process apically. 

 Palpi; first segment subquadrate, the Second narrowly oval, with a 

 length three times its diameter, the third as long as the second, 

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

 Face yellowish. Mesonotum fuscous yellowish. Scutellum, post- 

 scutellum and abdomen pale yellow. Wings rather broad, costa 

 light brown. Halteres and legs yellowish; claws very long, slender, 

 evenly curved, the pulvilli shorter than the claws. Genitalia; basal 

 clasp segment short; terminal clasp segment slightly swollen basally; 

 dorsal plate short, deeply and triangularly incised, the lobes narrowly 

 rounded; ventral plate short, truncate. Type Cecid. ai72ob. 



Arthrocnodax sambucifolia Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 404 

 1 91 8 ■ N. Y. State Mus. Bui. 20:^, p. 188 



This presumably pale yellowish male was reared at Albany, N. Y., 

 September 13, 1907 from rolled elder leaves, Sambucus 

 canadensis. 



Gall. Reared from rolled elder leaves. 



Larva. Length 1.5 mm, pale yellowish, slender. Head long, 

 tapering, with a length over twice its diam.eter; antennae slender, 

 with a length one-half greater than the diameter of the anterior 

 fourth of the head. The chitinous rods supporting the head one-half 

 longer than the head, converging posteriorly, the second segment 

 with a diameter twice that of the basal portion of the head, the third 

 with a diameter twice the posterior width of the second segment; 

 the second, third and fourth segments at least, with long, well devel- 

 oped, submedian, sublateral and lateral setae, those of the fifth 

 visible only on the lateral margins and on the following segments 

 apparently rudimentary. Skin coarsely shagreened; posterior 

 extremity roundly em.arginate, with obscure submedian tubercles. 



Male. Length i mm. Antennae one-fourth longer than the body, 

 rather sparsely haired, pale yellowish; fourteen segments, the fifth 

 with stems two and one-half times the diameter; terminal segment 

 produced, the distal enlargement cylindric, with a length two and 

 one-fourth times its diameter; apical process rather short, stout. 

 Palpi; first segment subquadrate, the second with a length three 

 times its diameter, the third as long as the second, slender, the 

 fourth one-fourth longer than the third, slender. Thorax and 

 abdomen probably pale yellowish. Wings hyaline, costa light straw. 

 Halteres and legs probably pale yellowish; claws very long, slender, 

 evenly curved, the pulvilli shorter than the claws. Genitalia; basal 

 clasp segment long, slender; terminal clasp segment swollen basally; 

 dorsal plate very short, deeply and narrowly emarginate, the lobes 

 truncate; ventral plate long, broad, broadly and slightly emarginate. 

 Type Cecid. ai723. 



