310 E. T. CRESSON. 



slender, black, with a yellow annulus about the middle, the basal joint beneath . 

 white; thorax black, upper and lower margins of prothorax, two central, longi- 

 tudinal lines on mcsothorax, two spots on tegulre, scutellum and post-scutel- 

 lum, wliite; a large white mark on each side of pleura, bearing two oblique 

 black lines: metathorax with two spots beliind, and one on each extreme side, 

 white; wings hyaline, nervnres black, areolet triangular, slightly oblique; legs 

 fulvous, the four anterior coxfe and trochanters white; posterior coxse and tro- 

 chanters black, the former with a large mark above, and their apex beneath, 

 white; tips of tarsi dusky; abdomen fulvous, tinged with dusKV at base; first 

 segment bicarinate, black at base and apex, the latter with tliree white spots: 

 second, third and fourth segments witli a lateral white spot at tip; beneath ful- 

 vous. Length 4i lines. 



Hab. — Illinois, (Dr. Lewis). One % specimen. 



I. honestus. — %. Head white, two spots behind insertion of antennae, spot on 

 vertex covering ocelli, and the occiput, black ; antenfise long, more slender at 

 tips, subserrate, black, with a broad yellowish annulus beyond the middle, be- 

 neath the basal half is fulvous, and the apical half yellow and dusky, the basal 

 joint beneath whitish; thorax black, margins of the prothorax, two longitudi- 

 nal lines on mesothorax, two dots on posterior margin, tegulse, scutellum, post- 

 scutellum, metathorax, except base and sides, line beneath each anterior wing, 

 and the pleura, except upper margins and spot in front of each middle coxa, all 

 Avhite; wings hyaline, faintly tinged with yellowish before the apex; legs ho- 

 ney-yellow, coxae and trochanters white, the posterior pair with an exterior 

 black mark, tarsi yellowish, tips of posterior femora within, and tips of their ti- 

 bise dusky ; abdomen elongate, narrow, subdepressed, honey -yellow, darker at 

 apex ; apical margin of the four basal segments and the apical segment entirely, 

 yellowish-white, the margin on the second, third and fourth segments dilated 

 on each side. Length 5 lines. 



Hab. — West Virginia, (Jas. Eidings). One % specimen. A prettily marked 

 species. 



I. uxorius. — 9- Robust, black ; head large, slightly narrowed beneath, eyes 

 prominent; orbits, very broad on the cheeks, face, clypcus, mandibles and pal- 

 pi, white; antennae long, convolute at apex, black, with a broad white annulus 

 beyond the middle ; collar, a large mark on each side of j)rotliorax above, double 

 spot on middle of mesothorax, a spot on each side behind near base of scutellum, 

 line beneath each anterior wing, scutellum, except base, post-scutellum, most 

 of pleura on sides and beneath, a large round spot on each extreme side of me- 

 tathorax and the posterior excavation, all white; metathorax transversely ru- 

 gose, the elevated lines sharply defined, the central area large and subquadrate, 

 and the posterior angles produced into a blunt spine; wings hyaline, areolet 

 smaller than usual and triangular ; legs honey-yellow, the four anterior coxse 

 and trochanters and base of posterior trochanters behind, white; abdomen un- 

 usually short, ovate, polished, fusco-ferruginous above, the basal segment black- 

 ish at tip above; beneath dull honey-yellow. Length 6 lines. 



Hab. — Cuba, (Coll. Dr. J. Gundlach, No. 30.) One f specimen.' May possibly 

 be the 9 of serricornis. 



I. scitulus. — This is an exceedingly variable species. The antonnx' have the 

 annulus sometimes very broad, sometimes subobsolete; the thorax often more 

 or less varied with ferruginous; the metathorax varies from black spotted with 

 yellow, to entirely ferruginous or yellow; the pleura often varied with yellow; 



