REPORT OF THE STATE ENTOMOLOGIST I915 l6l 



Gall. Subhemispheric, brown, slightly nippled, 1.75 mm in 

 diameter. It is monothalamous, occurs on the under side of the 

 leaf and causes on its upper surface a slight, brownish elevation 

 encircled by yellowish orange. 



Larva. Length 2.25 mm, rather stout, bright lemon yellow. 

 Head small; antennae short, stout. Breastbone broadly and 

 irregularly bidentate, the shaft narrow. Skin coarsely shagreened, 

 posterior extremity broadly rounded with submedian obtuse tubercles 

 and numerous short, stout, semitransparent spines. 



Male. Length 2 mm. Antennae extending to the fifth abdominal 

 segment, sparsely haired, fuscous yellowish; 14 segments, the fifth 

 with a length about three times its diameter; about 11 low circum- 

 fili ; terminal segment produced, with a length five times its diam.eter, 

 tapering. Palpi; first segment presumably stout, the second with a 

 length four times its diameter, the third a little longer, more slender, 

 the fourth one-half longer than the third. Mesonotum dark brown, 

 the submedian lines thickly haired. Scutellum reddish brown, post- 

 scut ellum fuscous yellowish. Abdomen dark brown, the incisures 

 and pleurae yellowish red, the segments sparsely haired posteriorly; 

 genitalia fuscous. Wings hyaline, costa dark brown; halteres yel- 

 lowish basally, pale orange apically, fuscous subapically. Coxae fus- 

 cous yellowish; femora and tibiae mostly fuscous yellowish; tarsi 

 dark brown; claws long, slender, strongly curved, pulvilli shorter 

 than the claws. Genitalia; dorsal plate short, deeply and roundly 

 emarginate, the lobes broadly rounded. 



Female. Length 2 mm.. Antennae extending to the fourth abdom- 

 inal segment, sparsely haired, fuscous yellowish; 14 segments, the 

 fifth with a length fully four times its diameter, with four coarsely 

 anastomosing circumfili; terminal segment slightly reduced, tapering, 

 narrowly rounded. Palpi; first segment subquadrate, the second 

 one-half longer, slender, the third a little longer, more slender than 

 the second, the fourth one-half longer than the third. Scutellum 

 deep red, postscutellum fuscous. Abdomen reddish orange, the 

 rather small dorsal sclerites dark brown and sparsely margined with 

 yellowish hairs. Halteres yellowish basally, fuscous apically. Coxae 

 slaty brown. Ovipositor about two-thirds the length of the abdomen. 

 Type Cecid. aigo2. 



Cincticornia americana Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124:380, 381 



This small, broad- winged form was reared in April 1908 from a 

 slight blisterlike swelling on the lateral veins of red oak, Quercus 

 rubra taken at Albany, N. Y., November 12, 1907. 



Gall. The gall is a slight, circular, blisterlike swelling on the 

 lateral veins beneath and of very nearly the same color as the leaf. 



