August, '15] 



FELT: XEW GALL FUDGES 



405 



NEW GALL MIDGES 



By E. P. Felt. Albany, X. Y. 



This paper characterizes a number of new and recently reared gall 

 midges. Among these may be found one referable to a genus not 

 hitherto recognized as American, and another belonging to a genus 

 recentl}^ erected by^ a well known European authority, Dr. Kieffer, 

 based upon a fairly well kno^m American species. 



Prionellus monilis Felt. — Several females agreeing very closely with 

 the type were collected May 1, 1914, hy Prof. J. ^I. Aldrich at Lafay- 

 ette, Ind., while sweeping Tsinter wheat. The male was unknown and 

 is described from this material. 



Male. — Length, 1 mm. Antemige nearly as long as the body, sparsely haired, 

 light brown; 14 segments, the fifth with the stem about three-fom'ths the length of 

 the rounded-pyriform basal enlargement, which latter has a length about one-third 

 greater than its diameter; two iudistinct crenulate whorls with a rudimentary third 

 and subapically a whorl of four, somewhat fusiform sensory organs, probably rudi- 

 ments of the distinct collar of the female; terminal segment reduced, narrowly oval, 

 obtusely rounded apically. Palpi; first segment irregularly quadrate, the second 

 broadly oval, the third one-half longer than the second, more slender, the fotulh 

 nearly ivdc^ as long as the second, more slender. ]\lesonotum dark shining brown. 

 Scutellum, postscutellum and abdomen dark reddish bro-^m. Halteres whitish 

 transparent. Legs mostly fuscous yellowish, the distal tarsal segments somewhat 

 darker; claws strongh' curved, finely denticulate, the pulvilh longer than the claws. 

 Genitalia; basal clasp segment short, stout; terminal clasp segment short, gi*eatly 

 swollen, with a length less than twice its diameter; dorsal plates long, broadly rounded; 

 ventral plate obscure. Harpes strongh' chitinized, approximate at the distal third, 

 the acute apices divergent. Cecid. 1582. 



Dasyneura torontoensis n. sp. — A number of small midges were 

 reared from Maianthemum canadense, yisiy 3, 1915, by Dr. A. Cosens, 

 Toronto, Can., from a root gall. Later in connection with the subter- 

 ranean habits of the species, Dr. Cosens writes that he was unable to 

 detect any attempt to fly on the part of the adults. The gall is fusi- 

 form, monothalamous and has a length of 7 mm., a diameter of 1.5 

 mm. and is inhabited by a whitish larva. 



This species runs in our key to Dasyneura piperike Felt, from which 

 it may be separated by the decidedh' shorter terminal antennal seg- 

 ment and the shorter fourth palpal segment. There are also colora- 

 tional differences. Onh' the female has been reared. 



Larva. — Length, 1.4 mm., whitish, stout, the skin coarsely shagreened and trans- 

 versely wrinkled. Head rather narrow, roundly acute, the antennae long, tapering, 

 with a length thrice the diameter; breastbone bidentate, strongly chitinized, slightly 

 expanded basaUy; posterior extremity of bod}' probably roundly truncate and with 

 a pair of submedian, tapering, fleshy processes. 

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