1865.] ENTOMOLOGICAL SOCIETY. 61 



of fine punctures which may be traced on the lateral and posterior 

 margins. Scutellum distinct. Elytra black, polished, each 

 elytron having eleven rows of fine shining punctures — the first 

 lateral row terminates where the second and third take the form 

 of a crescent on the margin of the apex ; the fourth and fifth are 

 joined ; the sixth, seventh, tenth, and eleventh join near the 

 sutural margin, and the eighth and ninth are the shortest, and 

 like the fourth and fifth join at their termination. There is a 

 stria on each side of the suture, and the latter has a golden tinge. 

 Body beneath and epipleurae chestnut, but the legs are of a 

 brighter color. The posterior ' tarsi are much larger than the 

 anterior pair. The abdomen is longer than the elytra, and 

 rounded at tip. Length T \ inch. Common in ponds near 

 Quebec, June and July. 



Dr. LeConte has expressed a doubt regarding the above. On 

 the strength of his knowledge of the species already catalogued, 

 I describe it as an addition to the list of Canadian Coleoptera. 

 Kirby describes two species, neither of which agree with the above. 

 The descriptions of the Gyrinidce in " Fauna Boreali Americana" 

 are imperfect:— G. impressicollis, Kirby, and G. ventralu, Kirby, 

 have not the row of punctures on the anterior margin of thorax. 

 The northern species described by Say and others, are almost all 

 identified by Dr. LeConte. 



3. Boletobius bimaculattjs. — Head black; thorax testa- 

 ceous, polished and darker on the disc. Elytra testaceous, smooth- 

 margined on the suture, and having a black spot on each elytrum. 

 Mouth and legs testaceous. Margin of abdominal rings chestnut, 

 posterior one black, acute. Length T 4 g inch. Quebec; rare. 



This species can be easily known from the conspicuous oblong 

 black spot on each elytron. The spots join the epipleurae, which 

 are black. It is also finely punctured underneath. 



4. Athous affinis. — Color cinnamon; finely punctured. 

 Head short, eyes black, round, occupying almost the entire side of 

 the head. Thorax oblong, about three times the length of head, 

 almost parallel with the eyes, but narrower than the elytra. 

 Length T 7 g inch. Quebec ; common. 



The above is unknown to Dr. LeConte. I have compared it 

 with his CorymUtes pyrrhos, which belongs to an allied genus, 

 and cannot detect sufficient specific difference to separate them. 

 The latter was pronounced by the Ent, Soc. Philad. to be 

 pyrrhos, Lee. ; however, I am satisfied, since Dr. LeConte has seen 

 the insect, that the specimen was not properly determined. 



