45 

 snbacuminate and very acute, but with scarcely any sinus : in the male it 

 is rounded. [Quite common in Canada. ] 



[103.] 145. OicEOPTOMA [Silpha] Americanum Z,///^/. — Length of 

 body 8>^ lines : breadth 7 hnes. Taken in Nova Scotia by Capt. Hall. 



Body very much depressed, thickly punctured with a hair issuing from 

 each puncture ,: on the under-side black. Head with a round impression 

 between the eyes ; prothorax pale-yellow with a subquadrangular sublobatc 

 black spot in the disk ; punctures of the prothorax very thick, those of the 

 discoidal spot resembling scratches ; elytra brown-black, rather silky, with 

 two longitudinal, undulated, obsolete ridges that do not reach the apex ; 

 their surface is covered with irregular elevations, and near the suture is a 

 series of punctiform impressions ; epipleura very wide with its horizontal 

 portion resplendent with a lustre between bronze and gold, vertical part, 

 or inner margin, yellow ; the suture of the elytra terminates in a minute 

 ix)int. Olivier says there are three ridges on the elytra, hv* only two are 

 discernible in the specimen here described. It is singular that no author 

 has noticed the brilliant side-covers of the elytra. [Synonymous with 

 S. peltcUa Catesby. Common in Canada ; north shore of Lake .Superior 

 (Agassiz).] 



146. OiCEOPTOMA [Silpha] terminatum Kirby. — Length of body 

 9j^ lines. Taken in Nova Scotia by Capt. Hall. 



This species seems nearly related to O. Americanum, but it is nar 

 rower in proportion to its length, the front has a distinct oblong impres- 

 sion ; the elytra are yellow at the apex and acuminate, which last is 

 probably a sexual character ; the epipleura is less brilliant than in the 

 preceding species, and the elytra are not silky. In other respects it 

 resembles it and may possibly be the female. [A variety of Silpha peltata 

 Catesby ; taken at Toronto by Mr. Couper] 



147. OiCEOPTOMA [Silpha] affine A'/r/^j-. — Length of body 9 lines. 

 Taken in Nova Scotia by Dr. Mac Culloch. 



Very like the preceding species, but the frontal impression is smaller 

 and round : the discoidal black spot of the prothorax is smaller, with the 

 lateral lobes rounded, and with round confluent punctures : the horizontal 

 part of the epipleura is black with a slight tint of blue, and not at all 

 bronzed. [Also a variety of S. peltata. Taken at Toronto by Mr. 

 Couper ; and on north shore of Lake Superior by Agassiz's Expedition.] 



[104.] 148. OiCEOPTOMA [Silpha] Canadensf. Kirby. — Length of 

 body 7 lines. Taken in dead fish on the shores of Lake Huron in 

 Canada, by Dr. Bigsby. 



This species approaches near to O. Americanum, but it is smaller, 



