92 NEW YORK STATE MUSEUM 



length fully twice the diameter ; face fuscous. INIesonotum reddish 

 brown, the submedian lines distinct, rather thickly clothed with 

 fuscous setae. Scutellum dark red, with a few apical setae, post- 

 scutellum and basal abdominal segment yellowish, the other ab- 

 dominal segments dark red with a yellowish cast apically, each 

 margined posteriorly with a rather thick conspicuous row of black 

 setae; ovipositor orange. Wings, costa dark brown. Halteres 

 fuscous yellowish basally, fuscous apically. Claws shorter than 

 the pulvilli. Ovipositor probably one-half the length of the body, 

 the terminal lobe short, broad, with a length about one-half greater 

 than its diameter. Cecid. ai4i2. 



Rhabdophaga ramuscula Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 351 



This species was reared April 22, 1907 from a willow, Salix twig 

 gall having every appearance of that ofR. batatas taken on 

 Staten Island. 



Gall. Apparently identical in appearance with that of Rhabdo- 

 phaga batatas Walsh. 



Male. Length 1.75 mm. Antennae nearly as long as the body, 

 dark brown; 16 or 17 segments, the fifth with a stem about three- 

 fourths the length of the subcylindric basal enlargement ; terminal 

 segment narrowly oval. Palpi ; first segment short, subrectangular, 

 slightly swollen distally, the second a little longer, rounded at the 

 extremities, the third as long as the second, more slender, the fourth 

 one-half longer and slightly stouter than the third. Mesonotum 

 dark brown, submedian lines rather thickly clothed with fine, yellow- 

 ish hairs. Scutellum reddish brown, with a few long, yellowish 

 setae apically, postscutellum dark brown. Abdomen dark brown, 

 the segments posteriorly sparsely clothed with fine hairs, the geni- 

 talia and venter rather thickly so. Wings hyaline, costa dark brown. 

 Halteres pale orange basally, fuscous apically. Legs reddish 

 brown, the tarsi darker ; claws long, slender, strongly curved, the 

 pulvilli as long as the claws. Genitalia ; basal clasp segment long, 

 stout ; terminal clasp segment enlarged basally ; dorsal plate broad, 

 broadly and triangularly emarginate ; ventral plate long, deeply and 

 triangularly incised. Harpes short, stout, distally two or three 

 long, diverging processes, each with a length two or three times its 

 diameter. 



Female. Length 2mm. Antennae about two-thirds the length of 

 the body, dark brown; 16 segments, the fifth subsessile, cylindric ; 

 with a length nearly twice the diameter ; terminal segment slightly 

 prolonged, acute distally. Ovipositor nearly one-half the length of 

 the abdomen, terminal lobes long, broad, broadly rounded. Other- 

 wise as in the male. Type Cecid. ai449a. 



