THE CANADIAN ENTOMOLOGIST. 215 



Body underneath black, covered with silver pile. Head brown-black, 

 subpilose ; two first joints of the promuscis black and robust, the 

 remainder rufous and more slender ; antennae rufous with the last joint 

 black ; eyes large, subhemispherical, brown ; prothorax dull-ferruginous, 

 with the lateral margin, a dorsal subelevated line, and the scutellum, paler ; 

 legs rufous, pale at the base ; hemelytra dull-ferruginous, with the lateral 

 margin and nervures black ; the bead that forms the lateral margin of the 

 abdomen, and the two last segments, are rufous ; the anal spines are very 

 little shorter than the tail. 



[283.I '395- Gerris lacustris Linn. — There were three pupa? of 

 this species taken, which do not appear to differ from the European 

 specimens. 



FAMILY CORIXID/E. 



396. Corixa striata Lmn. — Length of body 3 — $% lines. Many 

 specimens taken with the preceding. 



Body yellowish, depressed, naked, smooth. Head inflexed, obtuse ; 

 eyes brownish, triangular ; antennae inserted before the eyes under the 

 lateral margin ; scape incrassated ; remaining joints together are setiform ; 

 prothorax subtriangular, with the hemelytra, brown, streaked transversely, 

 with irregular yellow streaks ; epipleura not streaked, pale-yellow ; breast 

 black, spotted with yellow on the sides ; legs yellow ; anterior and pos- 

 terior tarsi natatory ; the latter longer than the tibiae ; abdomen with the 

 first ventral segment, and an abbreviated basilar band of the second, 

 black. 



Variety B. With the first joint of the posterior tarsi black at the 

 tip. This may be a distinct species ; there were seven 

 specimens distinguished by a black annulet surrounding 

 the terminal half of the first dilated joint of the tarsus 

 in question. 



[284.] 397. Corixa carinata Kirby. — Length of body 4 lines. 

 Two specimens taken with preceding species. 



Body yellow underneath, embrowned at the insertion of the legs. Head 

 yellow ; front broad and fiat ; labrum transversely tricarinate ; occiput 

 obtusangular ; vertex with an obsolete longitudinal ridge issuing from the 



