Billings on the Pine-boring Beetles, 45^- 



Next in order is Monohammus scutellatus (Say), which is about 

 one fourth smaller than M. confusor, and can always be readily 

 recognized by its dark, nearly black, shining bronze colour ; some 

 of the individuals having a i^ev^ irregular spots of yellowish white 

 scattered over the surface. The thorax and elytra are rugose, with 

 large transverse punctures, or rather short confluent wrinkles dis- 

 tinctly visible to the naked eye. The scutellum is white, the 

 thorax armed with a short spine on each side. The length of this 

 species is usually eight or ten lines, but individuals of from five to 

 eight lines are occasionally met with. The antennae are from' 

 three fourths of an inch to two inches in length. 



This species, although not so abundant as M. conftcsor, appears 

 to have a more extensive geographical distribution. It occurs in all- 

 parts of Canada, and it is found also in Nova Scotia, and in the Hud- 

 son Bay territories, northward to the Arctic regions. Mr. Couper 

 says it was taken by Sir John Richardson at Fort Simpson on the 

 Mackenzie River, in lat. 62^ N*. Mr. D'Urban says it was pro- 

 cured by Mr. Barnston, from Great Slave Lake, in lat. 54 N.f 



The third species is Monohammus marmoratus, (Randall). It is 

 described by Le Conte as being very much like M. confusor ; the 

 pincipal difi'erence consisting in the markings of the thorax, which 

 is closely covered with large rugose punctures, while in M. con- 

 fusor this part is not punctured. The antennae are black, and in 

 the female annulated with ash-grey. The elytra are quite sca_ 

 brous at the base from elevated points." Le Conte now unites 

 with it M. maculosus, (Haldimand) and his own two species, M. 

 mutator, and M. fatuor ; the first of the latter two described in 

 Agassiz's Lake Superior, and the last in the Jour. Acad. Nat. Sci. 

 Phi.2d Ser. Vol. 2, p. 148. It is abundant at Lake Superior. I have 

 never seen it ; and if it occurs in the valley of the Ottawa, it 

 must be very rare. 



The fourth species is J/bttoAa?wmws titillator^\ (Fabricius), Mr. 

 Couper cites it as occuring at Toronto, (Canadian Journal, 1st Ser. 

 Vol. 3. p. 212.) It is also given in Mr. Ibbetson's list of Canadian ■ 

 Goleoptera, at page 326 of the same volume. As neither of these 

 two entomologists mention M. confusor^ and as the original spe- 



* Couper in Canadian Journal, 1st Ser. Vol. 3, p. 212. 

 t D'Urban in Canadian Naturalist Vol. 5, p. 227. 

 Jin the new edition of Harbiss' Insects this species is figured with 

 thirteen joints in the antennae. 

 Can. Nat. 28 Vol. VII. 



