l68 NEW YORK STATE MUSEUM 



Cincticornia canadensis Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124:380 



This species, taken at Toronto, Ont., bears the date label 3-5-91 

 and occurs in the National Museum collection. 



Female. Length 2 mm. Antennae extending to the fourth abdom- 

 inal segment, sparsely haired, dark brown; 14 segments, the fifth 

 with a length two and one-half times its diameter, and with 6 cir- 

 cumfili; terminal segment slightly reduced, tapering to a narrowly 

 rounded apex. Palpi; the first segment short, stout, rounded distally, 

 the second about twice the length of the first, rather stout, the third 

 a little shorter than the second and the fourth about twice the length 

 of the third. Mesonotum dark brown. Scutellum purplish brown, 

 postscutellum reddish brown. Abdomen dark reddish brown. 

 Wings hyaline, costa light brown. Halteres fuscous yellowish bas- 

 ally, pale salmon apically. Legs mostly pale yellowish brown; 

 claws rather long, moderately stout, strongly curved, the pulvilli 

 shorter than the claws. Ovipositor about one-half the length of the 

 abdomen. Type Cecid. 1042. 



Cincticornia sobrina Felt 



1907 Felt, E. P. N. Y. State Mus. Bui. 110:158 (Asphondylia) 

 1908 N. Y. State Mus. Bui. 124:381 



Adults of this form were first reared by the late Dr M. T. Thomp- 

 son of Clark University, Worcester, Mass., from a vial containing 

 earth brought into the laboratory for the purpose of rearing Tineids. 

 It was then thought that they might have come from some seed, 

 possibly elm keys. Subsequent rearings in April igii resulted in 

 obtaining numerous flies, referable with little question to this species, 

 from the leaves of the black oak, Quercus velutina, and 

 probably those of other species, thickly infested with an incon- 

 spicuous, circular, blister gall. This species may be most easily 

 distinguished from allied forms by the coarse retictilations formed 

 by the circumfili on the antennal segm.ents of both male and fem.ale, 

 there being four or five transverse fili on each. 



Gall. An inconspicuous, circular, blister enlargement showing 

 mostly on the under surface of the leaf and varying in diameter 

 from 3 to 5 mm. 



Larva. Length 3.5 mm, stout, probably yellowish orange. Head 

 rather long, narrow, tapering. Antennae short, subconic, biartic- 

 ulate; breastbone long; the shaft rather stout, with a uniform diam- 

 eter, pale basally, expanded apically and m.inutely bidentate; skin 

 coarsely shagreened; posterior extremity broadly rounded and 

 apically with submedian short, conical, chitinous processes. 



