32 



prothonix. with the ;>nteri()r transverse series ot' jninctures double in the 

 middle, the posterior on^ not easily dis«ernil)le, disrontinuous in the middle: 

 there aijpcar no rows of |>im< tures on the elytra. Itut a few scattered ones 

 may b;j discovered; the four anterior legs are pice«nis. This species 

 apj>roa<'hes C. ihiiitviuitiis. I ml it is longer, less glijssy. the reticulations of 

 the surface are more <1istinct. no rows of punctures are discernible, as in 

 that on the el) tra, which, as well as the prothorax, are all of one colour ; 

 and the posterior legs are black. It seems still nearer C. ater^ but it is 

 much smaller, less convex, and has no fenestrate spor on the elytra. 

 [laken in Canada.] 



ioM. (Joi.YMHKTF.s .Xs.siMiiJS. Kirhy.- Length of body $3/^' lines. 

 Taken in Nova Scotia by Dr. MacCuUoch. 



Rod} rather depressed, between oblong and obovate, smooth, rather 

 glossy, black, covered abo\e ^vith an infinity of very minute reticulations. 

 Head dirty-yellow: vertex black, with a pair of confluent transverse reddish 

 spots; prothorax dirty-yellow, rather dusky in the disk, transverse punctures 

 nearly obliterated: elytra of the same colour as the prothorax, but 

 sprinkled with innumerable black dots, which, however, do not extend to 

 the base and sides; a row of more distant and larger dots adjoins the 

 suture : the fore -breast, the base and apex of the other ventral segments of 

 the abdomen are dirty yellow; the legs are of the same colour, but the 

 arms are shorter than usual, and piceous; the dilated posterior coxae are 

 sculptured with branching rugosities. This species represents C. notaius^ 

 which it is very like, but the elytra are wider towards the apex, which gives 

 the insect an obo\ate shape : the black dots of the elytra are more 

 numerous and minute ; the prothorax is without spots ; and the arms, or 

 fore-legs, are shorter and of a different colour. [Included wwA'iX Agabus, 

 in Melsheimer's Catalogue.] 



[73] ^07. CoLVMBETES TRiSERtATUS, Kirby. — Length of body 7^ 

 lines. A single specimen taken, I have a specimen also from New 

 England, taken by Professor Peck. 



Body elliptical, rather depressed, underneath black, and covered with 

 an infinity of branching or confluent wrinkles, as if scratched by a pin or 

 needle. Head black, anteriorly testaceous; between the eyes is a pair of 

 transverse red spots; antennae and palpi testaceous, dusky at the tips:' 

 prothorax testaceous, with an abbreviated, sub-bilobed, discoidal band ; 

 variously acuducted so as somewhat to resemble net-work: s^utellian 

 ferruginous, black at the base, very minutely and confluently punctured : 



