THE CANADIAN ENTOMOLOGIST. 5È 
DESCRIPTIONS OF NORTH AMERICAN HYMENOPTERA, No. 5 
BY E. T. CRESSON, - 
Continued from Vol. 4, Page 231. 
Genus Micropus, Nees. 
MICRODUS IMITATUS. JV. sf. 
?.—Sanguineous, shining; head, antennæ, prothorax, surroundings: 
-of scutellum, pleura beneath, four anterior legs, including their coxæ, 
posterior trochanters and their tibiæ and tarsi, black ; sides of mesothorax 
tinged with blackish; metathorax coarsely punctured above with four 
longitudinal carinæ, the two central ones approximate, flanks less coarsely 
punctured; wings uniformly fuliginous, with the usual hyaline angular 
streak beneath stigma; abdomen long, narrow, polished, with a purplish 
reflection ; ovipositor longer than body. Length .37 inch. 
Massachusetts. More slender than sanctus, with the mesothorax, 
scutellum and sides of pleura sanguineous; the metathorax is differently 
sculptured and the posterior tibiæ are black. À 
MICRODUS SIMILLIMUS. J. sp. 
g 9.—Pale sanguineous or fulvo-ferruginous ; head, antennæ, the 
thorax, except metathorax and four anterior legs including coxæ, black: 
metathorax opaque, scabrous ; wings fuliginous ; tips of posterior tibiae 
and tarsi more or less fuscous ; abdomen shining, suture between first and 
second segments very deeply impressed. Length .22—.27 inch. 
New Jersey; Pennsylvania; Illinois. Much smaller than savctus,. 
which it closely resembles, and from which it is at once distinguished by 
the posterior trochanters not being black. 
MICRODUS CALCARATUS. JV. sp. 
9 —Sanguineous ; head, antennæ, the thorax, except metathorax, 
four anterior legs, posterior trochanters and their tibiae and tarsi, black ;, 
four anterior knees, anterior tarsi except claws, intermediate tarsi except 
tips of joints, all the tibial spurs and apical joint of posterior tarsi, white 
or whitish ; metathorax shining above, with carinae forming an elongate 
central area; wings fuliginous as usual; abdomen shining, second 
