REPORT OF THE STATE ENTOMOLOGIST I918 



107 



Fig. 12 Caryomyia thompsoni, 

 breastbone of larva (enlarged, orig- 

 inal) 



in nature undoubtedly appear in early June. Several specimens 

 of Paralellodiposis caryae Felt were also reared from 

 this gall. 



Gall (pi. 10, fig. 8, and pi. 8). Subglobular, about 2 to 3 mm in 

 diameter, thin-walled, monothalamous and thickly clothed with 

 rather long, erect, reddish brown 

 or sometimes fuscous hairs. The 

 clothing of the galls sometimes 

 presents a somewhat whitish ap- 

 pearance. They much resemble 

 very small closed chestnut biirrs. 



Larva. Length 2.5 mm, stout, 

 whitish, the head small. An- 

 tennae biarticulate; breastbone 

 (fig. 12) long, slender, minutely 

 bidentate, the excavation broadly 

 rounded, the shaft reduced. The 

 body tapers slightly to a broadly 

 rounded, unarmed extremity. 



Exuvium. Length 2 mm. An- 

 tennal cases short, hardly extend- 

 ing to the base of the abdomen, 

 the internal basal angles weakly 

 chitinized. Cephalic horns rather 

 long, stout at the base, slightly 

 irregular. Wing and leg cases extending to the third abdominal 

 segment, the dorsiim of the segments margined with a rather thick 

 band of four irregular rows of stout, chitinous spines, the remainder 

 of the dorsal surface finely dotted with chitinous points. 



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

 thickly clothed with short hairs, pale orange yellowish; fourteen 

 sessile segments, the fifth with a length about three times its diameter, 

 the circumfila stout, the loops short, broad; terminal segment con- 

 stricted near the basal third, with a length nearly four times its 

 diameter, broadly rounded. Palpi; the first segment presimiably 

 rectangular, with a length more than twice its diameter, the second 

 short, greatly reduced, the third expanded and more than twice the 

 length of the second. Mesonotum fuscous yellowish, the submedian 

 lines sparsely haired. Scutellum dark reddish, postscutelliun fus- 

 cous yellowish. Abdomen dark reddish, somewhat fuscous laterally; 

 genitalia fuscous yellowish, fuscous apically. Wings hyaline, short, 

 very broad, cos'ta pale yellowish. Halteres and coxae pale orange; 

 femora and tibiae pale yellowish, the tarsi pale yellowish, somewhat 

 fuscous apically; claws long, slender, evenly curved, the pulvilli as 

 long as the claws. Genitalia; basal clasp segment short, stout; 

 terminal clasp segment somewhat reduced; dorsal plate long, broad, 

 triangularly emarginate, the lobes broadly rounded; ventral plate 

 long, broad, broadly and lightly emarginate. 



Female. Length 2 to 3 mm. Antennae extending to the third 

 abdominal segment, sparsely haired, pale yellowish, reddish apically; 



