Sept., I9I2.] Felt: New Gall Midges or Itonid^. 147 



A new species of Coquillcttomyia is characterized because it was 

 taken by Mr. Knab on spider webs. It is worthy of note in this 

 connection, that the New York Co quill ettomyia dcntata Felt has been 

 taken in numbers on spider webs at Newport, N. Y., both sexes being 

 captured. A species of Cliiwdiplosis probably undescribed, occurs 

 commonly on spider webs in the vicinity of Washington, D. C, ac- 

 cording to Mr. Knab. Recent collecting in the vicinity of Albany 

 shows that a species of Aphidolctcs may occur commonly on spider 

 webs, returning freely when driven therefrom, the latter indicating 

 this to be a normal habit. A female, Dasyncura species, was also cap- 

 tured with the Aphidoletes. The light, delicate midges make so little 

 disturbance in alighting upon and leaving the web that the spider 

 appears to ignore them entirely. 

 Coccidomyia erii, new species. 



Male.— Length 1.75 mm. Antennae nearly as long as the body, sparsely 

 haired, yellowish brown; 14 segments, the fifth with a stem three fourths 

 the length of the cylindric basal enlargement, which latter has a length twice 

 its diameter; terminal segment produced, with a length 2V2 times its diameter. 

 Palpi ; first segment short, irregular, the second tapering, with a length over 

 thrice its diameter. Mesonotum yellowish brown. Scutellum, postscutellum 

 and abdomen mostly fuscous yellowish. Wings hyaline, costa light straw. 

 Halteres yellowish transparent. Legs pale straw. Genitalia ; basal clasp seg- 

 ment long, stout, terminal clasp segment short, swollen. Other organs 

 indistinct. 



Female. — Length i mm. Antennae extending to the base of the abdomen, 

 sparsely haired, light straw; 12 segments, the fifth cylindric, subsessile, with 

 a length one half greater than its diameter; terminal segment produced, 

 narrowly oval, with a length about 2Y2 times its diameter. Palpi; first seg- 

 ment subquadrate, the second broadly oval. Mesonotum yellowish brown. 

 Scutellum and postscutellum fuscous yellowish, the abdomen yellowish white. 

 Halteres and legs pale straw. Claws long, slender, unidentate, the pulvilli as 

 long as the claws. Ovipositor as long as the body, the lobes narrowly oval 

 and sparsely setose. Type Cecid a234o. 



This small midge was reared in November, 191 1, by Mr. P. H. 

 Timberlake from Artemisia calif ornica infested with Erium lichtcn- 

 sioidcs Ckll. upon which the midge larvae were presumably preda- 

 ceous. The material was collected along the Casitas pass road back 

 of Carpenteria, Ventura county, California. This species is easily 

 separated from the allied C. pciiiisylz'aiiica Felt by the sessile antennal 

 segments of the female. 



