208 NEW YORK STATE MUSEUM 



Palpi ; the first segment stout, subquadrate, the second one-half longer, 

 broad, the third as long as the second, vslender, the fourth one-half 

 longer and more slender than the third. Face yellowish. Mesonotum 

 olive green, the submedian lines indistinct. Scutellum pale yellowish 

 green, postscutellum darker. Abdomen pale yellowish, slightly 

 greenish dorsally. Wings long, narrow, hyaline, costa light brown, 

 the third vein just beyond the apex; Halteres pale yellowish, fuscous 

 subapically. Legs a nearly uniform fuscous straw, the posterior 



Fig. 45 Phytophagalatipes; posterior tarsus, enlarged (original) 



tarsi with the second, third and fourth segments greatly dilated, 

 the second with a length four times its diameter, the third with 

 a length three times its diameter, the fourth a little shorter, more 

 slender. Claws long, slender, evenly curved, the pul villi as lonCTl 

 as the claws. Genitalia; basal clasp segment short, stout; terminal'^ 

 clasp segment long, stout, swollen basally; dorsal plate long, broad, 

 broadly and roundly emarginate; ventral plate long, broad, broadly, 

 and roundly emarginate. 



This form is peculiar in that the male antennae are almost identicals 

 in structure with those of certain female Diplosids. The wingsj 

 are unusually long and narrow, the genitalia peculiar, while the mostj 

 striking feature is the great dilation of certain segments of the 

 posterior tarsi. Type Cecid. 511. 



Phytophaga caulicola Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 370 (Mayetiola) 

 This reddish brown species was reared in some numbers froi] 

 slender willow, Salix, twigs April 27, 1908 taken by Mr L. H. Welc 

 at Evanston, 111. The rather slender, orange larvae occur in longj 

 oval cells in the pith or just beneath the bark about i mm in diam- 

 eter and 3 to 5 mm long. This species was reared from the same 

 twigs asRhabdophagacaulicola. 



Gall. The gall is indicated externally by very little or no swelling. 

 Five to six or more larvae may occur in a portion of a willow stem 

 2 to 3 mm in diameter and 10 cm long. 



