October, '11] FELT: NEW GALL MIDGES 483 



a length about oiic-fourtli greater than its (hameter; terminal segment produced, 

 broadly rouniled. Mesonotum shining dark brown. Scutellum reddish brown, 

 postscutellum dark brown. Abdomen a nearly uniform dark lirown, the segments 

 narrowly margined with a few white seta?. Coxa", femora and tibia) a variable 

 fuscous yellowish, slightly darker (list ally; tarsi nearly uniform yellowish brown. 

 Ovipositor nearly as long as the abdomen, with conspicuous lateral basal patches 

 of halberd-shaped scales; terminal lobe long, slender, narrowly rounded apically 

 and with a thick dorsal group of stout, slightly recurved, chitinous spines; minor 

 lobe short, stout. 



Reared from stems of Senecio nrizonensis taken at Oracle, Ariz., 

 April 22, 1899. Received through U. S. Bureau of Entomology. 

 Type C. 1062. 



Xeolasioplera agrostis n. sp. Male. — Length 1.25 mm. Antenna- light brown; 

 probably twenty or more segments, the fifth with a length a little greater that its 

 diameter. Palpi; the first segment irregularly subquadrate, the second narrowly 

 oval, the third a httle longer, the fourth one fourth longer and more slender than 

 the third. Mesonotum reddish brown, sparselj^ clothed with short yellowish scales. 

 Scutellum light reddish brown, postscutellum dark reddish brown. Abdomen dark 

 brown, the dorsum of the first to the fourth abdominal segments thickly clothed 

 with silvery white scales. Wings hyaline, costa dark brown, subcosta uniting with 

 the anterior margin near the basal third, the third vein just beyond the basal third. 

 Halteres wliitish transparent. Legs pale yellowish; Genitalia; basal clasp segment 

 rather long, truncate; terminal clasp segment swollen at the base, tapering; dorsal 

 plate rather long, broad, deeply and triangularly emarginate, the lobes tapering, 

 obliquely rounded, setose; ventral plate long, broad, tapering, narrowly rounded. 

 Harpes long, slender, tuberculate; style long, slender, narrowly rounded. 



Female. — Length 1.25 mm. Antennaj dark brown; twenty-four segments, the fifth 

 with a length a little less than its diameter; terminal segment narrowly oval. Palpi; 

 the first segment with a length twice its diameter, the second narrowly oval, the 

 third one third longer than the second, the fourth a httle longer. Mesonotum dark 

 reddish brown. Scutellum yellowish apically, reddish brown basally, postscutellum 

 dark brown. Abdomen dark brown, the basal segment thickly clothed with silvery 

 white scales, the second to fourth segments with lunate submedian silvery spots. 

 Tarsi dark brown; claws long, slender, unidentate, the pulvilli as long as the claws. 

 Ovipositor nearly as long as the abdomen, the dorsum of the seventh segment with 

 submedian irregular chitinous tliickenings, terminal lobes long, stout, narrowly- 

 rounded and thickly setose. Other characters as in the male. 



Reared in September from Eragrostis minor and loaned for study 

 by the U. S. National Museum. Type C. 1063. 



Neolasioptera squamo.-ia n. sp. Mah. — Length 1.25 nun. Antennae light brown; 

 twelve segments,the fifth with a length a little greater than its diameter, terminal 

 segment produced, tapering to a narrowly oval apex. Palpi; the second segment 

 narrowly oval, the third longer, stouter, the fourth with a length more than twice 

 the third. Mesonotum reddish brown, the submedian lines very tliickly clothed 

 with divergent yellowish white scales. Scutellum and postscutellum pale yellowish. 

 Abdomen apparently a yellowish brown, with rudimentary submedian silvery mark- 

 ings; genitalia pale yellowish. Wings hyaline, rather long, narrow, costa dark brown, 

 subcosta uniting with the anterior margin near the basal third, the third vein at the 



