52 THE CANADIAN ENTOMOLOGIS'. 
‘segment with two finely crenulated, transverse lines ; ovipositor as long as 
body. Length .25 inch. 
Delaware. Allied to sanctus, but much smaller, with the tibial spurs 
and four anterior tarsi white. / 
MIcRoDUS DIVISUS. JV. sp. 
î.—Sanguineous ; head, antennae, pleura, metathorax, post-scutellum, 
four anterior legs, including coxae, posterior coxae beneath, their tro- 
chanters, tips of their femora, their tibiae and tarsi, black ; metathorax 
roughly scabrous; wings fuliginous; abdomen depressed, smooth and 
polished, a broad, rather deep fovea on each side at base of second seg- 
ment. Length .34 inch. 
Illinois. Differs from medius, to which it is closely allied, by the color 
-of the legs ; the metathorax is more roughly sculptured, and the clear 
blotch beneath the stigma more obscure, while in medius it 1s very con- 
‘SPICUOUS. 
MICRODUS AGILIS. JV. sf. 
2.—Small, slender, black; tip of clypeus, labrum, mandibles and 
palpi yellowish ; thorax shining, metathorax opaque, scabrous; wings 
hyaline, faintly dusky, iridescent; legs pale sanguineous, posterior tibiae 
yellowish, their tips, a narrow annulus near base, and their tarsi, blackish; 
three basal segments of abdomen pale sanguineous, remainder black, 
shining ; ovipositor as long as body. Length .25 inch. 
Massachusetts. 
MICRODUS DISCOLOR. J. sp. 
g $.—Small, yellow-ferruginous ; antennæ entirely black; space 
between summit of eyes and two large spots on occiput, fuscous ; most of 
-prothorax, sutures of mesothorax, space around scutellum, sides of pleura 
and metathorax above, all more or less fuscous; metathorax transversely 
rugulose above ;. scutellum sometimes blackish, and the spots on occiput 
sometimes indistinct ; wings pale fuscous, areolet very minute ; legs honey 
yellow, most of tarsi, tips of four posterior tibia, tips of posterior femora 
and an annulus near base of their tibiae, blackish; abdomen opaque, 
shining beyond third segment, which is more or less fuscous; one speci 
men has the vertex, occiput and thorax entirely, the posterior tibiae except 
-broad median annulus, and the first, apex of the second, and the third 
