MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^E. 175 



Aeolus Zabriskiei, sp. uov. 

 (PI. XV, Fig. 7, c?.) 



S . Length, 1""". IJlack, polished, finely .sericeous; mandibles red- 

 dish; scape honey-yellow; tlagellum pale brown; legs, including coxa', 

 reddish-yellow. Head very large and broad, a little more than three 

 times as wide as thick antero-posteriorly, and much wider than the 

 thorax, the space between the eyes alone fully as wide as the thorax; 

 occiput concave, with the superior margin sharp; eyes broadly oval, 

 convex, bare; ocelli triangularly arranged, the laterals situated in the 

 posterior angle of the vertex, close to the eye. Antennje lli-jointed, 

 filiform; the scape clavate, about one-third as long as the flagellum ; 

 pedicel cyathiform, longer than any of the fnuiclar Joints ; funidar joints 

 all short, scarcely, if at all, longer than thick, pubescent. Thorax short, 

 ovate, rounded before, narrowed and truncate behind, the collar not 

 visible from above; mesonotum ii little broader than long, without fur- 

 rows; scutellum convexly elevated posteriorly, margined, or with a deli- 

 cate rim, laterally; metatliorax short, with short striae above. Wings 

 hyaline, with long cilia, a l)asal nervure, a short marginal and a short 

 stigmal vein ending in a snuill rounded stigma, the stigmal vein thick- 

 ened at base. 



Abdomen oval, narrowed and truncate at base, rounded and broad- 

 ened posteriorly, the first two segments transversely linear, the third 

 very large, occui)ying most of its surface, the fourth about as long as 

 the first two united, the following exceedingly short, scarcely visible, 

 except as transverse lines. 



Habitat. — Flatbush, Long Island. 



Types, two S specimens, in National Museum. 



Bred October 4, 18913, by Kev. J. L. Zabriskie, from the nest of an 

 unknown spider. 



CERATOB^US Aslim.. gen. uov. 

 (Type ('. connifiis Aslim.) 



Head very large and broad, much broader than the 1 horax, the oc- 

 ciput margined; ocelli 3 in a triangle, wide apart, the lateral touching 

 the eye; eyes broadly oval. 



Antenmv inserted at the base of the cly])eus, in 9 short, clavate. 

 7-jointed, the club very large, inarticulate; S unknown. 



Maxillary palpi ( ?) .S-jointed; labial pali)i L*-Jointed. 



Mandibles bifid. 



Thorax oval, the prothorax not visible from above; mesonotum with- 

 out furrows, or with but a slight trace of them i)osteriorly; scutellum 

 semicircular; metatliorax very short, abrupt. 



Front wings, when ])resent, with a distinct but short marginal vein, 

 an oblique stigmal, and no i>ost marginal, tlu' stigmal vein terminat- 

 ing in a slight knol). 



Abdomen oval, or }»ointed-o\ate, depressed, snb.sessile, composed (»f 



