scuDOEft. J CANADIAN FOSSIL INSECTS. 45 



Family HYDROPHILID^. 



Cercyon Leach. 



Cercyon 1 terrigena. 



Cercyon? terrigena Scudd., Rep. Prog. Geol. Surv. Can., 1877-1878, 179b (1879) ; 

 Id., Tert. Ins. N.A., 510-511, PI. n, fig. 21 (1890). 



A single elytron with the base broken off appears to represent a species 

 of Hydrophilidte, and perhaps is most nearly related to Cercyon, but of this 

 there is much doubt. The elytron is pretty well arched, equal nearly to 

 the tip, then rapidly rounded off, indicating an ovate beetle with the 

 shape of a Hydrobius or a shorter insect, and of about the size of ffelo- 

 phorus lineatus Say. Eight faintly impressed unimpunctured striae are 

 visible, the outer one, and to some extent the one next it, deeper ; these 

 two unite close to the tip, curving strongly apically ; the next two curve 

 slightly near their extremity, but are much shorter, not reaching the fourth 

 stria from the suture, which, like the remaining three, pursues a straight 

 course to the seventh stria. The surface between the striae is nearly 

 smooth, piceous. 



Length of fragment, 2-4"™; breadth of elytron, 1-35™"; distance 

 apart of the stria?, 0*1 5""". 



Nicola River, below main coal seam, British Columbia. One specimen, 

 No. 57 — Dr. Gr. M. Dawson. 



Hydrochus Germar. 

 Hydrochiis aiuictus. 



Hydrochus amictus Scudd., Tert. Ins. N.A., 515-516, PI. i, fig. 47 (1890). 



This species is mentioned here only to correct an error in my Tertiary 

 Insects, where it was credited to Scarboro', Ontario, on the shores of Lake 

 Ontario. It was really found by Dr. G. J. Hinde on the shores of Lake 

 Erie, near Cleveland, Ohio, in clay beds very similar to those of Scarboro'. 



Helophorus Illiger. 

 Helopborus regescens. 



Helophorus rigescens Scudd., Tert. Ins. N.A., 516-517, PI. i, fig. 53 (1890). 



This species also is mentioned here only to correct an error in my 

 Tertiary Insects, where it was credited to Scarboro', Ontario, on the shores 

 of Lake Ontario. It was really found by Dr. G. J. Hinde on the shores 

 of Lake Erie, near Cleveland, Ohio, in clay beds very similar to those of 



Scarboro'. 



91 

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