110 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Lygocerus triticiini Taylor. 



Ccraphron trilicmn Taylor, Am. Agrir. 18(50, p. .SOO, f. 1 ; Cress. Syn. Hym., p. 248. 



This fly does uot correspond witli the above {('erapliroii dcNlniftor S:\y), tliorefore 

 I have uamed it /r(7tCHm, froui tlie botanical uainii of wheat. It is not of ii\u-]i a 

 shining black as Mr. Say's fly, but is rather rusty in aiipearaucc^ from a few hairs 

 scattered over its body. In some specimens, when very fresh, tlit; legs have a bright 

 tinge of yellow. The antenuie (6, Fig. 2) ai'e termed setigerons (having the basal 

 joint large) and the last four globular, the intermediate one furnished with four 

 long bristles resembling plumes. This is a very sure mark for distinguishing this 

 family according to European classification. The eyes are large iu proportion, the 

 palpi 3-jointed. The fore wings have submarginal cells, with a faint nervun^ rnu- 

 uing to apex. The under wings have a long nervure running through and two 

 smaller ones descending to the inferior region ; these arc so very slight, that you can 

 only see their existeuce by a deep shade of the wings in a strong light, but are 

 evidently nervures, indistinct as they are. The ovipositor is retractile and tubular. 

 The fly deposits her eggs in the pupa of the Hessian fly, ( Taylor.) 



Unknown to me, and the above descriiition is copied from the Amer- 

 ican Agricultnrist. Miss Tayh>r further informs us that "this fly can 

 be found in every wheat field throughout the country, from spring to 

 autumn." Her description is very imperfect, and her figure of the 

 male antenna strongly recalls the branched antenna of an Uulophus. 



Lygocerus stigmatiis Say. 



Cerapliron atigmafiis Say, Boston Journ., i. p. 217 ; Lee. ed. Say's Works, ii, p. 724. 

 Lygocerus stigmaiiis Ashm., Eut. Am., iii, p. 98. 

 Ceraphron stigmaiiis Cr., Syu. Hym., p. 248. 



$ 9 . Length, 1.4™"". Black, pubescent, closely, minntely punctulate, 

 subopaque; abdomen ovate, pointed at tij), highly polished, the petiole 

 striate; legs piceous black, the anterior tibiiu and tarsi and knees ou 

 middle and hind legs and their tarsi, pale or honey yellow. AntenujB 

 in $ slightly thickened toward tips, the flagellar joints beyond the third, 

 scarcely longer than wide ; in the $ the first five flagellar joints dentate, 

 pilose, the first joint being about twice as long as thick, excluding the 

 short pedicel. 



Wings hyaline, the stigma semicircular, brown, the stigmal veinabout 

 If the length of the stigma. 



Habitat. — Indiana; Canada. 



Specimens in Coll. Ashmead and I^Tational JNIuseum. 



Recognized from specimens l)red by Mr. James Fletcher, at Ottawa, 

 Canada, from the raspberry aphis. 



Lygocerus niger Howard. 



Meffnspihts niger How., Ins. Life, vol. ii, p. 247., 9, f- ^^■ 

 Ceraphron irilicnm Smith, Kep. N. J. Exp. Sta., 1890, p. 502, f. 18. 



9. "Length, 1.0"""; expanse, 3.33"""; greatest width of fore wing, 

 0.62'"'". Scape of antenn;© very long, somewhat swollen beyond middle ; 

 funicle long, curved, all joints increasing gradually in width from ped- 



