MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.E. 107 



TRICHOSTERESIS F..i.st< i . 

 Hyiu. Stud., II, p. 97 (1856). 

 riilihominn Thorns., Ofv., 1858. 



(Type T. ghibra Boh.) 



Head transverse, the face, seen from before, not longer tlian Avide, 

 tlie occipnt margined; ocelli 3 in a cnrved line; eyes broadly oval, not 

 hairy. 



Antenna' inserted just above the clypeus, 11-jointed, subflliforin, the 

 scai)e 3 or 4 times as long- as the first fnniclar joint, the pedicel longer 

 than thick, the joints beyond the third short. 



Maxillary palpi 5-jointed; labial palpi 3-jointed. 



Mandibles bidentate. 



Thorax ovoid, the prothorax not visible from above; mesonotum not 

 or scarcely narrowed anteriorly, with 3 distinct impressed lines; scutel- 

 lum large, snbconvex, longer than wide, rounded posteriorly; meta- 

 thorax short, rounded posteriorly, unarmed, the spiracles large, orbi- 

 cular. 



Front wings entirely bare, without pubescence, with a large oval 

 stigma and a short, almost straight, stigmal vein, which is usually 

 shorter than the stigma; no parastigma. 



Abdomen ovate, smooth, the second segment the largest, occupying 

 about half the length of the abdomen. 



Legs not pilose. 



The non-pubescent wings will distinguish the genus from Lygocerus 

 and Megaspiliis^ with which it is most closely allied. 



Only one species, closely resembling the European T.f/hiher Boheman, 

 is known in our fauna. 



Tiichosteresis floridaniis Ashiii. 



(PL VI, Fig. 5, 9.) 



Ent. Am. in, p. 98; Cress. Syn. Hyui, p. 313. 



9 . Length 2.5""". Black, shining, finely alutaceous. Antennae 

 11 jointed, dark-brown, the first flagellar joint a little longer than the 

 pedicel, the following joints, except the last, scarcely longer than thick, 

 the last conic. Legs piceous black, the trochanters, knees, tips of 

 tibiie, and the tarsi dark honey-yellow or reddish. Wings clear hyaline, 

 without i)ubescence, the stigma large, semirotund, brown, the stigmal 

 vein not quite as long as the stigma. 



Habitat. — Jacksonville, Fla. 



Ty])e in Coll. Ashmead. 



LYGOCERUS Forster. 

 Hym. Stud., ii, p. 97 (1856). 

 Ceraphron Thorns., Ofv. 1858, p. 287. 



(Type L. raniicornis Boh.) 

 Head transverse, seen from before, the face broader than long, tlie 



