192 Journal New York Entomological Society, t^'o'- ^i^- 



fusiform, with a length about 2yi times its diameter. Mesonotum shining 

 dark brown. Scutellum reddish brown, postscutellum fuscous yellowish. 

 Abdomen dark reddish brown, the ovipositor yellowish, longer than the ab- 

 domen; terminal lobes with a length about 2^4 times the width and tapering 

 slightly to a broadly rounded, sparsely setose apex ; minor lobes short, obtuse. 

 Other characters practically as in the male. 



Type Cecid a2i 77, N. Y. State Museum. 



Xumerous midges were reared in the spring of 1911. This species 

 is easily separated from the allied L. flavotihialis Felt by the larger 

 number of antennal segments and marked differences in coloration. 

 Hyperdiplosis americana, new species. 



Larva. — Length i mm., a variable yellowish orange, moderately stout. 

 Head rather slender, the antennse stout, with a length about three times the 

 diameter; breastbone short, indistinctly trilobed ; ocular spot indistinct; skin 

 coarsely shagreened, the body segments each with a moderately stout seta 

 laterally, posterior extremity bilobed, the apex of each lobe slightly chitinized. 



Male. — Length i mm. Antennse one-half longer than the body, thickly 

 haired, light brown; 14 segments, the fifth having the two portions of the 

 stem, each with a length fully thrice the diameter, the basal enlargement sub- 

 globose, with a thick subbasal whorl of long, stout setje and a slender sub- 

 apical circumfilum, the loops of the latter extending to the base of the slightly 

 produced distal enlargement, which latter has a length one-half greater than 

 its diameter, a thick whorl of long, stout setae and subbasal and subapical 

 circumfili, the loops of the subapical filum extending to the base of the fol- 

 lowing segment ; terminal segment produced, basal portion of the stem with 

 a length five times its diameter, the distal enlargement cylindric, with a length 

 three times its diameter and apically a long, fingerlike process. Palpi ; first 

 segment subquadrate, the second twice the length of the first, slender, the 

 third as long as the second, more slender, the fourth about as long as the 

 second. Body pale yellowish. Wings yellowish, the third vein uniting with 

 costa well beyond the apex of the wing. Halteres pale yellowish. Coxae and 

 base of femora whitish transparent, the distal portion of femora, tibiae and 

 tarsi pale yellowish. Claws stout, strongly curved, simple, the pulvilli about 

 two-thirds the length of the claws. Genitalia ; basal clasp segment rather 

 slender, truncate ; terminal clasp segment long, slender ; dorsal plate short, 

 deeply and narrowly incised, the lobes broadly emarginate, produced laterally, 

 the angles each with a stout seta ; ventral plate long, very deeply and roundly 

 emarginate, the lobes slender, parallel and with a length fully five times the 

 width ; style long, slender, narrowly rounded. 



Female. — Length 1.2 mm. Antennas one-fourth longer than the body, 

 sparsely haired, light brown, the stems whitish, the fifth with a stem a little 

 longer than the subcylindric basal enlargement, which latter has a length 

 about 2j^ times its diameter and subbasal and subapical whorls of rather long, 

 stout setae ; terminal segment produced, the basal enlargement subcylindric. 



