506 TERTIARY INSECTS OF NORTH AlVIERICA. 



than long, with shghtly convex sides and hind border, the eyes of medium 

 size, obovate, a little in advance of the middle of the head. The prothorax 

 is smooth, as broad as the head, shaped quite as in L. elongatum (Linn.), 

 the sides straight, the anterior angles rounded off, the whole posterior 

 border well rounded. The abdomen is also as in the species mentioned, 

 with rounded, tapering tip, but the elytra are shorter, being barely as long 

 as the prothorax, with rounded apices. 



Length of body, 6.25"™; of head, 0.96"""; of eyes, 0.25""; breadth 

 of head, 1.02""; length of prothorax, 1.16"" ; of elytra, 1.05""; breadth 

 of abdomen, 1.2"". 



The above is the original description of the species. Since then other 

 specimens have been found by Dr. Packard and myself, some of which are 

 better preserved. These show that the head is of about equal length and 

 breadth, well rounded, and witli the surface slightly granular, as is also 

 the prothorax ; the last is of a very short oval shape, with regularly 

 rounded sides, scarcely more prominent anteriorly than posteriorly. 



Green River, Wyoming. Seven specimens, Nos. 5, 155** (F. C. A. 

 Richardson); 84, 94 (Dr. A. S. Packard); 3987, 4049, 4088 (S. H. Scudder). 



Latiirobium interglaciale. 

 PI. 1, Fig. 38. 



A single elytron indicates a species nearly as large as L. grande LeC, 

 but with coarser sculpturing than is common in this genus and more as in 

 Cryptobium ; but in the latter genus the posterior margin is outwardly pro- 

 duced. The inner basal angle indicates a pretty large scutellum. The 

 elytron is of nearly uniform width, with a nearly straight outer margin but 

 gently rounded, the greatest width close to the tip ; the posterior outer angle 

 is rounded off and the posterior margin straight. The deflexed portion of 

 the outer margin is narrow, subequal, rapidly tapering just before its termi- 

 nation, extending just beyond the middle of the apical half of the elytron ; 

 inner margin simple, l^exture dense, the surface of elytron coarsely, rather 

 shallowly, and not very closely, irregularlj- punctate, and marked besides by 

 four or five short, shallow, irregular, longitudinal grooves just within and 

 before the middle. 



Length of elytron, 2.5"" ; width of upper surface, 1.25°"". 



Interglacial clays near Scarboro, Ontario. One specimen, No. 14555 

 (G. J. Hinde). 



