486 TERTIARY INSECTS OF NORTH AMERICA. 



are rounded at the extremity, and are furnished with ten slightly arcuate 

 rows of gentle punctures, arranged inconspicuously in pairs, besides a 

 sutural, slightly oblique row on the basal third of the elytra, terminating in 

 the margin. This disposition of the punctures and the character of the 

 head, sunken, as it were, into the thoracic mass, leave little doubt that the 

 insect should be referred to Cryptocephalus. The elytra are of a uniform 

 light horn color, but the body is darker. The body is more oval than in 

 the parallel-sided C. venustus. 



Length of body, 4-4.5 mra ; breadth of same, 2.6-3.2 mm ; length of 

 elytra, 4 mm ; breadth of one of them, 1.8 mm . 



Green River, Wyoming. Two specimens, Nos. 4003 and 4004, 4039. 

 and 4044. 



DONACIA Fabricius. 



DONACIA STIRIA. 

 PI. 1, Fig. 28. 



This is represented by the mere fragment of an elytron, but with a 

 distinct kind of sculpturing. It seems to come as near D. porosicollis Lac 

 as any of our modern species I have seen. The tip is the part preserved ; 

 it is of a deep blue-black color, with an excessively fine, microscopic, trans- 

 verse rugulation, delicately impressed narrow striae, the striae minutely 

 punctulate, the first and last striae moderately distant from the margins, 

 deeply impressed, and less distinctly punctate. It is apparently a rather 

 small species. 



Length of fragment, 3.2 mm ; breadth of same, 1.4 mm . 



Interglacial clays of the neighborhood of Scarboro, Ontario. One 

 specimen, No. 14558 (G. J. Hinde). 



DONACIA POMPATICA. 

 PI. 1, Figs. 33, 34. 



This species, of which there are several examples at hand, is most nearly 

 allied to our living D. pubicollis Suffr., but is much smaller or about the size 

 of D. emarginata Kii'b. As to the sculpture of the surface of the elytra (the 

 only part preserved in any specimen), it would be difficult to say in what 

 respect it differed from the former' species except in the obliteration of the 



