20 E. T. CRESSON. 



Two 9 specimens. (Sumichrast Coll. Xo. 21.) This is much like 

 tragicua, and is readily distinguished by the prominent tubercles on 

 metathorax. 



38. Ichneumon aztecus, n. .sp. 



S. — Lemon-yellow, thinly pubescent; occiput, middle of vertex, 

 antennas except scape beneath, spot on each side of pi-othorax, meso- 

 thorax except two central lines, spot beneath tegulae, basal suture of 

 metathorax, spot on apex of posterior coxae behind, their tibiae except 

 base, their tarsi, and basal suture of the abdominal segments above, 

 sometimes obsolete on first and second, black ; wings subhyaline, ner- 

 vures and stigma black. Same form and sculpture as lenis. Length 

 6 — Go lines. 



Five % specimens. (Sumichrast Coll. No. 00.) This has somewhat 

 the general appearance of exquisitus (No. 21), but is very distinct both 

 in sculpture and ornamentation. 



Genus HOPLISMENUS, Grav. 

 Scutellum flattened. 



Abdomen mostly reddish Sp. 1 — 2 



" banded with white or yellow 3— 8 



Scutellum elevated, unituberculate. 



Body reddish-yellow, occiput black — 9 



" black and yellow 10—12 



Scutellum elevated, bituberculate — 13 



1. Hoplismenus rixosus, n. sp. 



5 . — Black, opaque; face, clypeus, mouth, orbits, cheeks, broad an- 

 nulus on antennae, scape beneath, upper and lower margins of prothorax, 

 the former interrupted medially, spot on each side over teguhe, scutel- 

 lum, band at base of metathorax, two longitudinal marks beneath spines, 

 a large spot on the flanks, line beneath teguh^, mark beneath posterior 

 wings, and a large oblique mark on pleura, dilated beneath, white or 

 yellowish-white; wings hyaline, faintly tinged with yellowish, nervures 

 blackish, stigma fulvous ; legs fulvo-ferruginous, four anterior coxto and 

 trochanters whitish, posterior tarsi yellow, posterior coxae yellowish. 

 blackish behind, tips of tarsi blackish ; abdomen dull ferruginous, basal 

 segment whitish at tip, base of second segment dusky. Antennae long, 

 third joint longer than fourth ; thorax without distinct punctures; scu- 

 tellum narrow, carinate laterally ; metathorax with sharply defined ele- 

 vated lines, sides transversely striated, spines long and acute; areolet 

 5-augular ; abdomen flat, shining, petiole long, slender. Length 5 lines. 



One 9 specimen. 



