December, '11] FELT: NEW gall midges 551 



its diameter, the distal part with a length two and one half times its diameter; 

 basal enlargement subglobose, with a sparse subbasal whorl of stout seta? and a 

 subapical circumfilum, the loops hardlj' extending beyond the tip of the swelling, 

 the distal enlargement with a length one half greater than its diameter, a rather 

 thick whorl of slender seta" and subbasal and subapical circumfili, the loops of the 

 latter extending to the apex of the segment. Palpi; first segment subquadrate, the 

 second with a length three times its diameter, the third a little longer than the second, 

 more slender, the fourth a little longer than the third, somewhat dilated. Mesonotum 

 reddish brown, the submedian lines yellowish. Scutellum yellowi.sh, postscutellum 

 yellowish brown. Abdomen rather thickly haired, dark reddish brown. Wings 

 hyaline, costa light brown, the third vein uniting with the margin a little before the 

 apex. Halteres whitish transparent. Femora and tibiae a light straw, the tarsi 

 mostly light brown, the distal segments somewhat darker; claws long, slender, 

 evenly curved, the anterior and mid probably unidentate, the pulvilU as long as 

 the claws. GenitaUa; basal clasp segment long, slender, truncate; terminal cla.sp 

 segment rather long and slender; dorsal plate short, deeply and triangularly emargi- 

 nate, the lobes triangular and sparsely setose; \'entral plate long, broad, broadly 

 truncate and sparsely setose apically. Harpes rather stout, tapering, coarsely 

 spined apically; style long, tapering to a narrowly rounded apex. 



Female. — Length 1 mm. Antenna; light brown; fourteen segments, the fifth 

 having a stem one fourth the length of the cylindric basal portion, which latter has 

 a length two and one half times its diameter and sparse subbasal and subapical 

 whorls of stout setae. Palpi probably as in the male. Mesonotum yellowish brown. 

 Scutellum yello^ash, postscutellum yello-wish browTi. Abdomen reddish brown, the 

 basal segments yellowish. Ovipositor short, terminal lobes narrowly lanceolate, with 

 a length fully twice the width, thickly setose. 



Reared from oats without any indication as to locality or date. 

 Loaned for study by the U. S. Bureau of Entomology. Type C. 955. 



Youngoniyia quercina n. sp. Male. — Length 2 mm. Antennai reddish brown; 

 fourteen segments, the fifth trinodose, the two portions of the stem, each with a 

 length about tw^o and one half times the diameter; basal enlargement subglobose, 

 with a thick subbasal whorl of long, stout setae and a subapical circumfilum, the 

 loops extending nearly to the base of the distal enlargement, which latter is deeply 

 though narrowly constricted near the basal third, has subbasal and subapical whorls 

 of long, stout seta; and similar circumfili, the loops of the distal circumfilum extending 

 to the tip of the segment; terminal segment greatly produced, the basal portion of 

 the stem with a length six times its diameter, the distal enlargement greatly produced, 

 strongly constricted near the basal third, and apically with along, finger-like process 

 with a length fully six times its diameter and but slightly swollen basally. Palpi; 

 first segment .subquadrate, the second with a length five times its diameter, the third 

 and fourth more slender, each a Httle shorter than the second. Me-sonotum light 

 yellowish red. Scutellum and postscutellum pale yellowish. Abdomen sparsely 

 haired, a variable yellowish brown, the distal segments somewhat darker. Wings 

 hyaline, costa hght brown. Halteres pale yellowish. Legs a nearly uniform light 

 brown; claws stout, strongly curved, unidentate, the puKilli about two thirds the 

 length of the claws. Genitalia; basal clasp segment short, stout, truncate, the basal 

 lobe rounded; terminal clasp segment one half longer than the basal, long, stout, 

 curved; dorsal plate broadly and triangularly emarginate, the lobes si)arsely setose 

 internally; ventral plate rather short, stout, broadly rounded and thickly setose 

 apically. Harpes thickly setose; style long, stout, expanded distally. 



