52 THE CANADIAN ENTOMOLOGIST. 



.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. N. sp. 



$ . — 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 is very con- 

 spicuous. 



Microdus agilis. N. sp. 



^ . — 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. N. sp. 



$ $ . — Small, yellow-ferruginous ; antennas 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 tibiae, 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 



