THE CANADIAN ENTOMOLOGIST. 53 
segments of abdomen black. The ¢ varies from entirely ferruginous, 
except antennae and posterior tibiae, to almost entirely black. Length 
Br AL INChA. 
Illinois. A very variable species. 
MICRODUS PALLENS. JV. Sf. 
9 .—Honey-yellow, shining ; tips of mandibles and antennae black, 
scape reddish beneath ; metathorax roughened, opaque, pubescent ; wings 
pale fuscous, areolet sub-triangular ; intermediate tarsi dusky, tips of 
posterior tibiae and their tarsi black ; abdomen polished. Length .22 
inch. 
Illinois. Allied to f#/vescens, Cress., with clear spot beneath stigma 
much less distinct. 
MICRODUS LATICINCTUS. JV. sf. 
¢ .—Small, black, shining; mandibles and palpi pale; metathorax 
scabrous; tegulae pale honey-yellow ; wings hyaline, iridescent: stigma 
blackish ; legs honey-yellow, posterior coxae dusky at base beneath, their 
tibiae yellow, broadly black at tips, their tarsi fuscous ; abdomen shining 
black, first segment longitudinally striated, second yellowish, remainder 
polished. Length .20 inch. 
Missouri. (C. V. Riley.) 
MICRODUS CINCTUS. AV. sp. 
g 2.—Small, black, shining; tip of clypeus, mandibles and palpi 
pale-yellowish ; antennæ pale testaceous, more or less dusky toward tips, 
scape piceous ; metathorax opaque, finely scabrous ; tegulae pale ; wings 
hyaline, iridescent, faintly dusky; legs honey-yellow, tips of posterior 
femora above black, their tibiae yellow, black at tips, with a narrow black 
annulus near base, their tarsi fuscous ; coxae of © generally entirely black, 
of ¢ entirely honey-yellow; abdomen black, polished, first segment 
Opaque, second segment pale honey-yellow. Length .17 inch. 
Illinois. Smaller than /aticinctus, from which it is at once distinguished 
by the first abdominal segment not being striated. 
MICRODUS ANNULIPES. JV. Sf. 
® .—Small, black, shining ; clypeus, mandibles and palpi more or less 
pale-yellowish ; metathorax rugose, somewhat shining ; tegulae honey- 
yellow; wings hyaline, iridescent, stigma and nervures pale brown; legs 
