144 HEIDEMANN [S6] 



now taken by Professor Kincaid may likely be a new species. It be- 

 longs to the Aradus betulcz group, and is most closely allied to Say's 

 species, Aradus similis, but differs in having the margins of abdomen 

 more parallel, the prolongation of head more elongate, and the scutellum 

 quite differently shaped. The sides are sinuated and the basal inner 

 part of scutellum more transversely elevated. As there is but one 

 specimen, a satisfactory description of a new species can not be given. 



Family NABIDJE. 

 Nabis flavo-marginatus Scholz var. sibericus Renter. 



Nabis flavo-marginatus var. sibiricus REUTER, Ofv. Finska Vet. Soc. Forh., 

 xix, p. 60, 1877. 



Three specimens, females, from Cook Inlet and Kadiak (July). 

 The species is known from Europe, Siberia, and Greenland. Nabis 

 flavo-marginatus Scholz is also found in Canada (St. John, New 

 Brunswick). 



Family GERRIDJB. 



Gerris rufoscutellatus Latreille. 



Gerris rufoscutellatus LATREILLE, Gen. Crust, et Ins., in, p. 134, 1807. 

 Uhler's List, p. 26, 1886. 



Two specimens from Metlakahtla (June 6). The insect is found 

 in Europe, East Siberia, and boreal America. 



Family CORISID^. 

 Corisa germarii Fieber. 



Corisa germarii FIEBER, Species Generis Corisa, n, p. 38, 1858. Uhler's 

 List, p. 29, 1886. 



Nine specimens, four males and five females, from Popof Island. 

 Inhabits Europe, North America, Alaska. 



Corisa convexa Fieber. 



Corisa convexa FIEBER, Species Generis Corisa, n, p. 37, 1858. Uhler's List, 

 p. 29, 1886. 



Three females, from Popof Island and Berg Bay. Found also in 

 North America and Labrador, near the coast line. 



Corisa praeusta Fieber. 



Corisa pr<zusta FIEBER, Species Generis Corisa, n, p. 28, 1858. Uhler's List, 

 p. 29, 1886. 



Five specimens, one male, the others females, from Muir Glacier 

 (pond on the west side, June 12), Popof Island (June 20), Berg Bay 

 (June 10), Kadiak (July), Sitka. Previously found at Sitka. 



