Sept., igis.] Felt: New Asian Gall Midges. ■ 179 



Diadiplosis hirticornis new species. 



The midges described below were received under date of April 

 19, 191 5, from Mr. H. S. Smith, Superintendent of the State Insectary, 

 Sacramento, Cal., accompanied by the statement that they had been 

 reared from mealy bugs from Japan, and labeled Calif. 799, Ex. 

 Pseiidococcus vapor. This species is quite different from other known 

 forms referred to this genus. 



Male. — Length .9 mm. Antennae one-half longer than the body, thickly 

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

 the stem subequal, each with a length about one-half greater than the diam- 

 eter, the circumfili moderately long, the loops thick, there being fourteen to 

 sixteen to each filum, the terminal segment somewhat redviced, the basal 

 portion of the stem with a length about twice its diameter, the distal enlarge- 

 ment subcylindric, with a length one-half greater than its diameter, almost 

 truncate apically, the terminal appendage rudimentary. Palpi : the first seg- 

 ment broadly oval, the second narrowly oval, a little shorter, the third one- 

 half longer than the second, more slender. Mesonotum reddish brown, tbe 

 sparsely haired submedian lines yellowish. Scutellum, postscutellum and 

 pleurae fuscous yellowish. Abdomen mostly fuscous yellowish, the third 

 abdominal segment with a fuscous spot dorsally, the genitalia a little darker. 

 Wings hyaline, the third vein uniting with the margin at the apex of the 

 wing. Halteres and coxae pale yellowish ; legs mostly a nearly uniform dark 

 straw, the two distal tarsal segments yellowish white ; claws slender, strongly 

 curved, the anterior unidentate, the pulvilli about half the length of the claws. 

 Genitalia : basal clasp segment rather slender, long ; terminal clasp segment long, 

 tapering to a strongly recurved, chitinous claw ; dorsal plate long, broad, deeply 

 and triangularly emarginate, the lobes diverging, rather thickly clothed with 

 short setae ; ventral plate long, spatulate, subtruncate, distally slightly emar- 

 ginate ; style short, tapering, acute distally. 



Female. — Length 1.3 mm. Antennae about three-fourths the length of 

 the body, sparsely haired, pale brownish yellow ; fourteen segments, the fifth 

 with a stem one-fourth the length of the cylindric basal enlargement, which 

 latter has a length about twice its diameter ; terminal segment subcylindric, 

 with a length two and one-half to three times its diameter, tapering ab- 

 ruptly to a short, broadly conical apical process. Mesonotum yellowish 

 brown. Scutellum and postscutellum fuscous yellowish. Abdomen mostly 

 fuscous yellowish, the dorsum of the third and fourth segments mesially, 

 dark brown. Ovipositor short, the terminal lobes narrowly oval and rather 

 thickly clothed with long setae. Other characters nearly as in the male. 



Type Cecid. a26i8. 



