1 66 ENTOMOLOGICAL NEWS. [May, 



COLORADO CYNIPID/E. -(Continued.) 



By C. P. GILLETTE. 



NEUROTERUS. 



N. congregatus n. sp. 



Galls occurring in terminal and probably axial buds. The twig ex- 

 pands next to the bud, and within the bud develop a number of little 

 globular capsules covered and surrounded by a hairy or woolly growth. 

 The capsules themselves resemble very much those of N. vesicula Bass. 

 I have four of these gall clusters that measure from 6 to 8 mm. across, 

 and each is composed of from ten to fifteen of the little globular capsules. 

 After the flies have eaten out of the capsules the gall-cluster reminds one 

 of the rose to a watering pot. 



Gall-flies black, feet and antennae brown, length 2 mm ; all males. 



Head black, shining, with a very fine crackled appearance ; eyes large 

 and prominent ; face narrow and rectangular in outline, the inner margins 

 of the eyes as seen in front being straight and parallel ; mandibles reddish 

 yellow, ocelli rather prominent and slightly elevated. Thorax smooth 

 and shining, with the fine crackled appearance common to the genus, 

 without any signs of parapsidal or other grooves, and with a broad notch 

 at the base of the scutellum ; scutellum without foveae, but with a shallow 

 basal groove, shining, and with the crackled appearance indistinct, es- 

 pecially on the central portion. Abdomen petiolate, black. Feet dark 

 brown, light at the joints. Wings 3 mm. long, radial cell long and narrow, 

 radial nervure almost attaining the costal margin, cubital nervure faint, 

 and hence the areolet rather indisti;ict, all the nerves dark brown. An- 

 tennce i4-jointed, joints 1-3 and often the basal portion of the fourth light 

 yellow, remaining joints brown or blackish ; first and second joints robust, 

 third as long as fourth and fifth together. 



Described from twenty bred flies from galls taken at Manitou, 

 Col., May 8, 1892. All of the flies hatched before May iyth. 



N. virgens n. sp. 



Galls. This species can hardly be said to produce a gall. The cells 

 of the flies were found in the Spring of the year in twigs of the last Sum- 

 mer's growth. The twigs are usually slightly swollen where the cells 

 occur, but not enough to attract attention. I should not have noticed 

 them at all had I not seen dead twigs with numerous small punctures in 

 them, from which flies had escaped during previous years. 



Gall-fly black, with the first three joints of the antennae yellowish brown . 

 Length 1.5 to 2 mm.; all females. 



Head black and shining ; under a power of seventy-five diameters the 

 surface has a finely crackled or scaled appearance as has also the meso- 

 thorax ; ocelli medium in size, face with median ridge; antennae 13- 

 jointed, gradually thickened to the tip, first three joints yellowish, third 



