MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPIDiE. 229 



9 short, clavate, the club large oval, compact, 5-jointed; in $ sub- 

 clavate, subinoniliform. 



Mandibles short, bidentate. 



Maxillary palpi 4:-.jointed; labial palpi S-jointed. 



Thorax ovate, produced into a little neck anteriorly; the mesonotum 

 subeonvex, without furrows; the scutellum semicircular; the meta- 

 thorax short, the angles not ])rominent. 



Front wings with tlie submarginal vein joining the costa at about 

 half the length of the wing, the marginal vein short, linear, the post- 

 marginal very long, the stignial short, oblique, clavate. 



Abdomen fusiform, sessile, a little longer than the head and thorax 

 together, with the segments strongly constricted at the sutures, the 

 first the longest, the following subequal. 



Legs with the femora and tibifp subclavate, the tibial spurs well de- 

 veloped 1, 1, 1, the middle and posterior tarsi not longer than their 

 tibife, the basal joint of hind tarsi about thrice as long as the second. 



This genus is readily distinguished by the constricted abdominal 

 segments. 1 have species from South America and have seen others 

 from the West Indies, but no doubt the genus will be found to occur 

 also in our fauna. 



'"- Cremastobaeus bicolor, sp. uov. 



(PI. r, Fig. 3, 9.) 



$ 2 . Length, 1 to 1.1""". Head and thorax black, faintly micro- 

 scopically punctate, the punctation not destroying the luster of the 

 surfii<!e; eyes oval, pubescent; abdomen brownish-yellow, fusiform, 

 the segments strongly constricted at the sutures, the sutures cre- 

 nate; legs yellow. Antenujv brownish-yellow, the club oval-rotund, 

 5-jointed, black ; the first funiclar joint is the stoutest and longest joint, 

 the following to the club gradually subequal, the last two rounded, a 

 little transverse. Wings hyaline, the marginal vein a little longer than 

 the stigmal, the latter short, oblicjue, ending in a little knob; no trace 

 of basal or anal nervures. 



The $ is entirely black, with the scape, pedicel of antennae, and the 

 legs, yellow; the thorax more distinctly punctate; flagellum sub-filiform, 

 brown, pubescent, very slightly thickened toward tip, the joints, after 

 the first, submoniliform, scarcely longer than thick. 



Habitat.— St. Vincent. 



Typas in National Museum and British Museum. 



Described from one $ , three $ specimens collected by Herbert H. 

 Smith. 



HADRONOTUS Furster. 



Hym. Stud., ii, p. 101 (1856). 



(Tjrpe U. laticepg Forst.) 



Head transverse, usually very wide, the frons convex, the face with 

 an impression above the insertion of the antennte, cheeks margined; 



