THE CANADIAN ENTOMOLOGIST. 53 



segments of abdomen black. The £ varies from entirely ferruginous,, 

 except antennae and posterior tibiae, to almost entirely black. Length 

 .14 inch. 



Illinois. A very variable species. 



MlCRODUS PALLENS. N. Sp. 



°. . — Honey-yellow, shining ; tips of mandibles and antennae black, 

 scape reddish beneath j 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 fulvescens, Cress., with clear spot beneath stigma, 

 much less "distinct. 



MlCRODUS LATICINCTUS. IV. Sp. 



$ . — 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.) 



MlCRODUS CINCTUS. N. Sf). 



J % . — Small, black, shining ; tip of clypeus, mandibles and palpi 

 pale-yellowish ; antennae 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 laticitictus^ from which it is at once distinguished 

 by the first abdominal segment not being striated. 



MlCRODUS ANNULIPES. N. Sp. 



$ . — Small, black, shining j 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 



