REPORT OF THE STATE ENTOMOLOGIST I918 169 



a slight central point and as it develops the circular cap is lifted up 

 and borne on the top of the gall. At this stage the gall is hemispheric, 

 attached to the leaf by a point on its convex under surface, while the 

 Bat top is covered with an epithelial plate. The rim of the gall is 

 slightly raised, forming a low wall around the upper area. Many of 

 the galls never develop further, while the rims on others continue 

 to grow at several points until the upgrowths, bend inward, meet 

 and inclose a sort of upper chamber above the real top of the gall. 

 This latter is empty, as the larva lives in the large cavity beneath. 



Three females of this species were reared by us May 15 and 17, 

 1909 from a globular, thin- walled, monothalamous, long-haired, 

 hickory leaf gall much resembling the typical C. persicoides 

 gall. 



Exuvium. Length 2 mm, whitish, slender; antennal cases long, 

 slender, acute apically, the internal basal angle somewhat slightly 

 chitinized; cephalic horns long, slender. Wing cases extending to 

 the fifth abdominal segment, the leg cases to the apex of the abdomen; 

 dorsum of the abdomen with the segments margined posteriorly 

 with an irregular row of stout, simple or compound spines, the 

 remainder of the surface being mostly dotted with fine, chitinous 

 points. 



Male. Length 2.5 mm. Antennae one-fourth longer than the 

 body, sparsely haired, light brown; fourteen segments, the third to 

 the fourteenth trinodose, the fifth with stems one and one-fourth 

 and three and one-half times their diameters respectively; terminal 

 segment, distal enlargement with a length three times its diameter 

 and a long, tapering, fingerlike appendage distally. Palpi; first 

 segment short, subquadrate, the second one-half longer, stout, the 

 third one-half longer than the second, more slender, the fourth a 

 little longer than the third. Mesonotum brown, yellowish at the 

 apex. Scutellum reddish. Abdomen yellow, the segments mar- 

 gined posteriorly with dark brown and with a short, transverse 

 brown line near the middle. Wings (pi. 15, fig. 6) hyaline, costa 

 dark brown; halteres yellowish. Legs yellowish basally, the tibiae 

 and tarsi brown; claws long, strongly curved distally, the pulvilli 

 rudimentary. Genitalia (pi. 17, fig. i); dorsal plate short, broad, 

 deeply and narrowly incised, the lobes obliquely truncate; ventral 

 plate long, tapering slightly, a narrowly rounded apex; style long, 

 slender, acute. 



Female. Length 2.25 mm. Antennae as long as the body, rather 

 thickly haired, dark brown; fourteen segments, the fifth binodose, 

 the irregular stems two and two and one-half times their diameters, 

 respectively; basal enlargement narrowly oval and with an irreg- 

 ular double whorl of long, stout setae; distal enlargement produced, 

 expanded apically, with a length twice its diameter and low circum- 

 fila basally and apically. There is also a scattering whorl of slender 

 setae. Distal segments cylindric, with a short stem, the fourteenth 



