Che Canadian Entomologist. 
VO IVs - LONDON, ONT., APRIL, 1872. No. 4 
DESCRIPTIONS OF 
NORTH AMERICAN HYMENOPTERA, No. 2. 
Continued from Page 24. 
BY E. T. CRESSON, PHILADELPHIA. 
Family ICHNEUMONID. 
Genus PEZOMACHUS, Grav. 
1. PEzomMacHus Perritiu. JV. 5p.—©.— Head piceous-black, face 
rufo-piceous, the middle longitudinally prominent; mandibles fuscous ; 
antennæ longer than head and thorax, pale ferruginous, dusky at tips; 
thorax nearly as long as abdomen, piceous-brown, paler laterally and 
beneath, nodes subequal; legs entirely piceous-brown ; abdomen ovate 
beyond first segment, shining piceous-black ; first segment narrow, slightly 
dilated behind the lateral tubercles which are not prominent, apical margin 
pale ; sometimes the head, thorax and abdomen are entirely piceous- 
black, except the pale band at apex of first segment which is always 
conspicuous in this species; ovipositor short, about as long as first 
abdominal segment. Length .14—.15 inch. 
Æab.— Ontario, Canada. Two specimens received from Johnson 
Pettit, Esq., of Grimsby, after whom this easily recognized species is 
named. 
2. PEZOMACHUS GENTILIS. lV. sp.— © .—Head entirely black ; antennæ 
longer than head and thorax, pale ferruginous, fuscous at tips, and dark 
at incisures of joints; thorax nearly as long as abdomen, anterior node 
ferruginous, larger than posterior one which is convex and black; legs 
honey-yellow, tibiz and tarsi yellowish; abdomen fuscous, ovate beyond 
first segment which is pale at base, and scarcely dilated behind the pro- . 
minent lateral tubercles; basal and apical margins of second segment 
faintly pale; ovipositor rather longer than first abdominal segment. 
Length .12 inch. 
g§.—Black ; antenne blackish, ferruginous at base; prothorax, legs 
and first abdominal segment ferruginous or honey-yellow ; second, third 
and most of fourth segments pale honey-yellow, apical segment black; 
wings ample, hyaline, iridescent, with a faint cloud beneath stigma, which 
