92 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



shorter but thicker. The prouotum is much narrower than the meso- 

 notum, although about as long; niesonotum with two furrows; scutel- 

 luiu bifoveated, the fovese widely separated but connected by a trans- 

 verse line; inetathorax short, coarsely rugose, with some dorsal raised 

 lines. Wings hyaline, with a fuscous band across the marginal cell 

 two-thirds the width of wing, ahjost devoid of pubescence; stigma 

 lanceolate; stignuil vein long curved; abdomen globose, black, petio- 

 lated, the petiole slender, rufous, as long as the hind cox.-e, the second 

 and third segments very large, equal, occupying nearly the whole sur- 

 face, the following segments retracted. 



Habitat. — Mar<piette, Mich. 



Type 9 in Coll. Ashmead. 



Described from a single specimen cai)tured by Mr. E. A. Schwarz. 



CHELOGYNUS Ilalidfiy. 

 Ent. Mag., i, p. 273 (1833). 

 (Type f. fuMcicornis Dalin.) 



Head transverse, the vertex broad, convex; the cheeks oblicpie, the 

 occiput not d<'eply concave, margined; ocelli 3 in a triangle, but 

 widely sei)arated ; eyes oval, subprominent. 



Antennae inserted just above the clypeus, 10-jointed, the flrst flagel- 

 lar joint scarcely as h)ng as the scape, usually shorter, the following 

 joints short, in S the following joints lengthened. 



Maxillary p*.lpi Ti-jointed. 



Mandibles truncate at tips, 3- or 4-dentate; the teeth acute, slightly 

 subequal, the inner tooth the smallest. 



Thorax elongate; prothorax in 9 as long, or nearlj as long, as the 

 mesonotum, subcpiadrate, obliquely impressed at sides, in i very short; 

 raesonotum usually with two distinct furrows or indicated anteriorly; 

 metathorax long, rounded posteriorly. 



Front wings with a large ovate or subovate stigm.a, two basal cells 

 and a stigmal vein. 



Abdomen subpetiolate, ovate, the set^ond segment the largest, the 

 others giadually subequal. 



Legs of moderate length, the femora obclavate, stout, the anterior 

 tarsi in the 9 chelate. 



The ovate stigma and the 5 jointed labial i)alpi snfficiently separate 

 tiiis genus from Jioechus; and these characters, in connection with the 

 difterence in the shai)e of the head and pnmotuni, and the differences 

 to be pointed out in tlu^ chehe distinguish it from Dry in us; while the 

 longer pronotum, the o jointed maxillary palpi, and the ditteiences in 

 th<} relative length of the anterior tarsal joints and the chelai can be 

 depended ui)on to separate it from Anteon. _ . ._, ^.,^ .- ^ 



