REPORT OF THE STATE ENTOMOLOGIST I918 



225 



fall. The galls are very local in the vicinity of Nassau, we have 

 received them from Michigan, and Jarvis records them as somewhat 

 rare at Ontario, Canada. Eupelmus dryorhizoxeni 

 Ashm. and Torymius species were reared from this gall. 



Gall. Length i cm. Height 2 cm, strongly compressed, crinkled 

 with an irregular, serrate edge. Color mostly green, irregularly 

 marked with yellowish, especially in the older galls, portions of the 

 tips frequently turning brown. 



Cocoon. Length 4 mm, diameter 1.5 mm. This is composed of 

 a few whitish threads to which ntmierous fine particles of sand 

 adhere. The structure is so open that the deep red body of the 

 larva can be easily seen. 



Male. Length 4 mm. Antennae a little longer than the body, 

 sparsely haired, reddish brown; foiurteen segments, the fifth 

 with stems each one-fourth longer than 

 their diameters; terminal segment pro- 

 duced, the distal enlargement broad, 

 subglobular and with a slightly pro- 

 longed subconic tip. Palpi; the first 

 segment stout, subrectangular, the sec- 

 ond shorter, broadly oval, the third one- 

 half longer, narrowly oval. Mesonotum 

 dark brown, the submedian lines 

 sparsely clothed with whitish hairs and 

 a few scattered hairs on the lateral bor- 

 ders. Scutellum dark brown, a few 

 whitish hairs on each side, postscutel- 

 lum slightly darker. Abdomen dark 

 red, pleurae darker. Wings hyaline, 

 costa reddish brown, the third vein 

 uniting with the margin a little beyond the 

 apex; halteres and coxae yellowish red, 

 the remainder of the legs a little paler, with 

 the tarsi somewhat whitish; claws stout, 

 evenly curved, the pulvilli shorter than the claws. Genitalia; basal 

 clasp Segment long, stout; terminal clasp segment stout, slightly 

 swollen near the distal third and apically; dorsal plate short, broad, 

 broadly rounded; ventral plate short, broad, broadly and roundly 

 emarginate, the lobes irregularly rounded. 



Female. Length 4 mm. Antennae extending to the fourth 

 abdominal segment, yellowish red or reddish, sparsely haired; four- 

 teen segments, stem of fifth (fig. 48) with a length about one-sixth 

 of the subcylindric basal enlargement, which latter has a length fully 

 three times its diameter, is- slightly constricted near the basal third; 

 heavy, though rather short, circumfila at the basal fourth, near the 

 middle and subapically, the loops a little longer than the distance 

 between the supporting stems; terminal segment produced, slender, 

 with an irregular apical appendage. Palpi; the first segment long, 

 irregularly rectangular, the second short, irregularly oval, the third 





Fig. 48' Trishormomyia 

 crataegifolia, fifth antennal 

 segment of female (enlarged, 

 original) 



