208 NEW YORK STATE MUSEUM 



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

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

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

 olive green, the submedian lines indistinct. Scutellum pale yellowish 

 green, post scutellum 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 pulvilli as long 

 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 identical 

 in structure with those of certain female Diplosids. The wings 

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

 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 from 

 slender willow, Salix, twigs April 27, igoS taken by Mr L. H. Weld 

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

 oval cells in the pith or just beneath the bark about 1 nun in diam- 

 eter and 3 to 5 111111 long. This Species was reared from the same 

 twigs as R h a 1) d p h a g a. e a u 1 i e o 1 a. 



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



Five to six or more larvae may, occur in a portion o\ a willow stem 

 2 to 3 mm in diameter and 10 cm long. 



