84 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



it agrees in size ; the punctuation is rather coarser and heavier, and it is 

 whoUj black, instead of being apioally ferruginous. Length, 2 "2"™; 

 breadth, M5°"°. 



One specimen: No. 16880, Logan's brickyard, Toronto. 



L. divisum, comes from Vancouver Island. 



Lathrobium debilitatum sp. nov. 

 PL XI., Pig. 6. 



This species is very closely allied to the last, from which it differs 

 slightly in its proportions, its uniform breadth, and its piceous colour ; 

 its punctuation is very similar. It is also to be compared with the same 

 modern species, from which it differs similarly and also in the proportions 

 of the elytra which are considerably broader in proportion to the length. 

 Length, 2°""; breadth, 1-2°'". 



One specimen : No. 16881, Scarborough. 



Lathrobium exesum sp. nov. 



PI. XI., Fig. 7. 



Another species of Lathrobium is represented by a single elytron, 

 about twice as long as broad, broadening faintly posteriorly, with mar- 

 ginate sutural border and sharply carinate lateral margination, the pos- 

 terior margin rigidly truncate, the inner apical angle rectangulate, the 

 outer strongly rounded, the surface uniform dark castaneous, and with 

 moderately profuse sharp and delicate punctuation. It appears to be 

 rather close to L. nigrum LeC; it has the same proportions, but is slightly 

 larger, and the punctuation is deeper, sharper and more profuse. Length, 

 2.imm . breadth of dorsal surface, l-l"". 



One specimen : No. 16882, Reservoir Park, Toronto. 



L. nigrum is reported from Massachusetts and Lake Superior. 



Lathrobium inhibitum sp. nov. 



PL XI., Fig. 4. 



This and the following species of Lathrobium have relatively much 

 longer elytra than those above described, these being in the present 

 species about a fifth more than twice as long as broad. The elytron 

 broadens slightly posteriorly, has a truncate posterior margin, both apical 

 margins rounded rectangulate, the sutural border delicately marginate in 

 its distal half, the surface blackish castaneous, rather obscurely and some- 



