154 Journal New York Entomological Society. H^oI. xx. 



Clinodiplosis araneosa, new species. 



Male. — Length 1.5 mm. Antennae one half longer than the body, thickly- 

 haired, probably light brown; 14 segments, the fifth with the stems 2^/^ and 

 3 times their diameters, respectively ; terminal segment produced, the basal 

 portion of the stem with a length four times its diameter, the distal en- 

 largement cylindric, with a length thrice its diameter and apically a long, 

 slender, tapering process. Palpi ; first segment irregularly fusiform, the 

 second segment with a length about four times its diameter, the third a little 

 longer and more slender, the fourth one fourth longer than the third, some- 

 what dilated. Mesonotum probably light brown. Scutellum and postscu- 

 tellum probably fuscous yellowish. Abdomen probably yellowish brown. 

 Wings hyaline, costa light straw. Halteres and legs yellowish straw. Claws 

 slender, strongly curved, those of the anterior and mid legs unidentate, the 

 pulvilli about one third the length of the claws. Genitalia ; basal clasp seg- 

 ment long, stout; terminal clasp segment long, slender; dorsal plate broad, 

 deeply and triangularly incised, the lobes obliquely truncate ; ventral plate 

 moderately broad, broadly emarginate, the lobes short and broad. 



Female. — Length 2 mm. Antennae extending to the fourth abdominal 

 segment, thickly haired, yellowish brown ; 14 segments, the fifth with a stem 

 one half the length of the cylindric basal enlargement, which latter has a 

 length 2^ times its diameter. Mesonotum reddish brown, the submedian 

 lines yellowish. Scutellum pale yellowish, postscutellum light brown. Abdo- 

 men mostly yellowish brown, sparsely haired. Halteres pale yellowish. Legs 

 light straw. Ovipositor about one half the length of the abdomen, the ter- 

 minal lobes narrowly lanceolate, with a length about 2j^ times the width. 

 Type Cecid a2277. 



A number of midges belonging to this species were received in 

 1912 from Mr. Frederick Knab accompanied by the statement that 

 they occur commonly about Washington, D, C, on spider webs. The 

 material studied was captured August 30 at Cabin John, Md. Allied 

 to C. caulicola Coq., from which it may be separated by the short, 

 broad lobes of the ventral plate. 



Coquillettomyia knabi, new species. 



Male. — Length i mm. Antennas twice the length of the body, rather 

 thickly haired, light brown ; 14 segments, the fifth having the stems with a 

 length 3 and 4 times their diameters, respectively, the distal enlargement 

 subcylindric, with a length about twice its diameter, the circumfili well de- 

 veloped, the loops of the distal filum attaining the apex of the segment. 

 Palpi ; first segment subglobose, the second with a length four times its 

 diameter, swollen distally, the third one half longer than the second, slender, 

 the fourth one fourth longer than the third, slightly dilated. Mesonotum 

 slaty brown, the submedian lines and scutellum fuscous yellowish, postscu- 

 tellum slightly darker, the abdomen sparsely white-haired, dark brown. 



