INSECTS OF THE PRIBILOF ISLANDS. 549 



Family DYTISCIDAE. 

 LaccophiluB decipiens Lee. 



Collected by Wosiiessenski ou St. George. Widely distributed in western North 

 America, occurring as far east as Kansas. 



Family HYDROPHILIDAE. 

 Berosus maculosus Mannerheim. 



Described from St. George Island; also recorded from Unalaska. 

 Cercyon lateralis Marsbam. 



Collected on St. Paul Island by Wosuessenski. Occurs along the Pacific coast of 

 North America; also in Siberia and the more boreal part of Europe. 



Family SILPHIDAE. 

 LyroBoma opacum Mannh. 



Collected on St. Paul Island by Wosuessenski. Also known from the Aleutian 

 Islands, Bering Island, Copper Island, and Kamchatka. 



Family STAPHYLINIDAE. 

 Hadrotus crassus Mannh. 



Collected ou St. George Island by Wosuessenski. A maritime species occurring 

 along the coast as far south as California. 



Tachinus apterus Men. 



Found on St. George Island by Wosuessenski. 

 Olophrum fusciim Grav. {latum Miiklin). 



Found on St. George Island by Wosuessenski. Also known from the peninsula of 

 Kenai, Alaska, Siberia, Caucasus Mountains, and in more boreal parts of Europe. 



Family CHRYSOMELIDAE. 

 Chrysomela subsulcata Mannh. 



Described from St. Paul Island (Wosnessenski), from which locality Messrs. True 

 and Prentiss forwarded two specimens. Another specimen from the same collectors 

 from St. George Island. This remarkable species seems to be peculiar to the Pribilof 

 Islands. 



Family AEGIALTIDAE. 

 Aegialites californica Motachulsky. 



This remarkable species does not appear to be rare on St. Paul Island, for in the 

 stomach of a shore bird, Limosa lapponica (shot on Walrus Island, G miles distant from 

 St. Paul on June 20), which was examined at the Department of Agriculture in 1896, 

 numerous specimens were found. The locality, "California," of the typical specimen 

 in Motschulski's collection is extremely doubtful; the species is known to occur in the 

 peninsula of Kenai and in Sitka. 



