385 



pedicel inserted within the scape, short and stout; funicle 

 joints long, in the male filiform, in the female slightly- 

 thickened distad. Maxillary palpi long and slender, 5-jointed, 

 the first joint short; labials 3-jointed. Mandibles small, or 

 absent (?). Pronotum short, situated far below the scutum 

 (lateral aspect), with a large, stout, semi-erect,- sharp horn on 

 either side. Propleura not striate. Scutum with deep, com- 

 plete, parapsidal furrows, these meeting caudad. Scutellum 

 with a deep transverse groove at base. Postscutellum with a 

 large semi-erect spine, this blunt at apex. Metanotum rugose. 

 Petiole of abdomen very short ; body of abdomen narrowed 

 somewhat at base, compressed laterally ; the male with two or 

 three segments visible, the first occupying almost all of surface; 

 the female with one segment only visible, produced into a long 

 fleshy oviduct, this about as long as the abdomen. Legs long 

 and slender, tarsal claws simple. Forewings ample; sub- 

 marginal vein distant from the costa, the stigma slender, 

 lanceolate ; radial cell closed, long, over twice as long as 

 greatest width ; basal vein distinct, not attaining the sub- 

 marginal ; median and submedian veins distinct, the latter 

 fading distad, the former curving upward and forming a rather 

 short discoidal vein, this separated from a proximal prolonga- 

 tion of the radial vein by a short interruption ; median vein 

 with also at its apex a short vein curving downward, this 

 giving off a false recurrent vein running almost parallel with 

 the hind margin of the wing ; another false recurrent vein 

 runs from near discoidal vein almost to the wing apex ; veins, 

 -except where otherwise stated, true, not brown lines or marks. 

 Hindwings with a costal vein onl}''. 



A remarkable genus, widely separated from other genera 

 of its family. The form of the scape, apparent absence of 

 mandibles, spined pronotum and postscutellum, slender stigma, 

 and well-developed venation readily distinguish it. Type. — 

 The following species. 



ACANTHOSERPHUS ALB I COXA, n. Sp. 



9. Black, shining, with a dull-yellowish patch involving 

 the t-egula; coxae white, also joints 9 and 10 (except apex of 

 latter) of antennae ; rest of antennae black, the scape and 

 pedicel golden-yellow, also trochanters, femora, and tibiae ; 

 the tibiae faintly dusky, the tarsi fuscous. Body shining, 

 smooth, with very scattered pin-punctures, the rretanctiuii 

 rugose. Forewings long and broad, uniformly darkly infus- 

 cate, the venation fuscous. Funicle joints' long, rod-like, 

 gradually shortening, the first longest, the tenth not twice as 

 long as wide, the last joint one-third longer than preceding, 



N 



