REPORT OF THE STATE ENTOMOLOGIST 1918 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 
flat 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 1s and 17, 
190g 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 (pl. 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 (pl. 17, fig. 1); 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 
