nmm 



86 CONTRIBUTIONS TO CANADIAN PALjaONTOLOQX. 



Arpedium stillicidii. 



Arpedium stillicidii Scudd., Contr. Can. Pal., ii., 42, pi. ii., fig. 2 (1892). 

 Two additional specimens, Nos. 16896, 16897, from Scarborough are 

 found in the material sent by Professor Coleman. 



Olophrum celatum sp. nov. 

 PL XII., Fig. 5. 



A pair of elytra, a trifle less than twice as long as broad, of equal 

 breadth, with truncate hind margin, but strongly rounded apical angles, 

 delicately margined sutural border, the surface piceous and profusely and 

 sharply punctate, represent a species of Olophrum allied to 0. convexum 

 Makl. The size and proportions are the same, but there is no oastaneous 

 in the colouring, and the punctuation in the fossil is a little closer and 

 considerably more delicate. Length, 2 •2""; breadth, 1-2" 



Two specimens : Nos. 16892, 16893, Scarborough. 



0. convexum is found in Alaska. 



Olophrum arcanum sp. nov. 

 PI. XII., Pig. 6. 



Another species of Olophrum is closely allied to the last, and may also 

 be compared with the same modern type. It is slightly smaller and more 

 slender than 0. celatum, and the puncta are more shallow and less distinct. 

 It is of a dull black colour. Length 2-15"™ ; breadth, 0-9"°". 



One specimen ; No. 16894, Scarborough. 



Olophrum dej actum sp. nov. 



PL XII., Fig. 7. 



The last species of Olophrum differs considerably from the others in 

 the much greater proportional length of the elytra which are about two 

 and a half times longer than broad, with parallel sides, truncate apical 

 margin, rectangulate apical angles, and the surface piceous at base, 

 changing apically to blackish castaneous, the punctuation profuse and 

 pronounced. It comes in the vicinity of 0. obtectum Erichs., but is slen- 



