REPORT OF THE STATE ENTOMOLOGIST I913 



207 



f 



Fig. 30 R h i z o m y i a 

 absobrina, fifth an- 

 tennal segment of female 

 (enlarged, original) 



cylindric, fimbriate, unicellular galls. Apparently the same form 

 was obtained from a jar containing subglobular poplar leaf galls, 

 and from another stocked with distorted cherries, produced by 

 Dasyneura virginiana Felt. It is possibly an inquiline. 



Male. Length 1.25 mm. Antennae 

 nearly as long as the body, thickly haired, 

 dark brown; 12 segments, the fifth with 

 a stem as long as the basal enlargement, 

 which latter has a length two and one- 

 half times its diameter ; terminal segment 

 produced, tapering, obtuse. Palpi ; the 

 first segment short, stout, subquadrate, 

 the second twice the length of the first, 

 more slender, the third one-half longer 

 than the second, expanded. Head, mes- 

 onotum, abdomen, coxae and pleurae all 

 reddish yellow, the mesonotum with sub- 

 lateral, slightly brownish areas, the ab- 

 domen sparsely clothed dorsally with dark hairs. Wings hyaline, 

 costa dark brown. Halteres yellowish transparent, fuscous sub- 



apically. Legs with the coxae and 

 femora pale yellowish, the latter 

 darker distally ; tibiae and tarsi 

 dark brown ; claws long, slender, 

 strongly curved, the pulvilli shorter 

 than the claws. Genitalia ; basal 

 clasp segment short, stout ; terminal 

 clasp segment long, stout at base ; 

 dorsal plate short, broad, deeply 

 and triangularly incised ; ventral 

 plate long, broadly and roundly 

 emarginate. 



Female. Length i mm. Anten- 

 nae extending to the third abdom- 

 inal segment, sparsely haired, dark 

 brown, yellowish basally; 12 seg- 

 ments, the fifth subsessile, cylindric, 

 with a length thrice its diameter ; 

 terminal segment produced, nar- 

 rowly rounded. Palpi probably 

 triarticulate. Face yellowish. Mes- 

 onotum dark brown, the sub- 

 median lines sparsely haired. Scutellum pale orange, post- 

 scutellum pale yellowish. Abdomen rather thickly clothed with 

 fuscous hairs, pale yellowish. Ovipositor short, the terminal lobes 

 short, stout, broadly rounded, otherwise nearly as in the male 

 Type Cecid. ai555x. 





Fig. 31 Rhizomyia absob- 

 rina, tip of abdomen showing 

 ovipositor (enlarged, original) 



