l8Q2.] ENTOMOLOGICAL NEWS. 



the publication by Dr. Horn of his Synopsis in the " Transactions 

 of the American Entomological Society." At that time but three 

 species of the division Sphtzroderus were known, all from the 

 Atlantic region, none of them ranging farther south than North 

 Carolina. Since then the labors of Mr. Ricksecker have re- 

 sulted in the discovery of two more species (relictus and regu- 

 laris) from the Spokane River region of Washington, both ot 

 these having been also taken by myself at Cceur d'Alene, Idaho, 

 in company with the third western species only lately described 

 by Dr. Horn (" Ent. Am." vol. vi, p. 71) as Merkelii. This 

 shows Sph&roderus to be northern rather than northeastern in its 

 distribution, an equal number of species having been found on 

 each side of the continent, "none, however, being southern forms. 



Scaphinotus, as is shown by the first paragraph, extends into 

 Arizona besides covering in its distribution the region assigned 

 to it by Dr. Horn, in his paper cited, from New York south to 

 North Carolina and thence west to Colorado a range afterwards 

 extended some distance southwards by the discovery of C. 

 {Scaphinotus} Snowii in New Mexico. 



Doubtless, the division Pemphus will remain characteristic of 

 the north Pacific coast fauna, though Brennus supposed, until 

 lately, to be confined to the coast fauna proper, has been shown 

 by me (ENT. NEWS, vol. i, p. 33) to inhabit parts of Montana. 

 The species recorded, C. marginatus, has heretofore been reported 

 only from the stretch of coast from Oregon to Alaska, and its 

 occurrence in Montana is of great interest, adding, as it does, 

 another species to those common to the great central chain ol 

 mountains and the far north. During the glacial epoch, or ju-t 

 following it, this species probably inhabited the stretch of country 

 from the Rockies to the coast, but the gradual northward retreat 

 of the face of the glaciated area so changed the climate of this 

 intervening region that marginatus was unable to retain its place. 

 The Montana form already shows some minor differences from 

 those found on the coast, and only time seems needed to dillrr- 

 entiate it as a distinct species. 



Until the discovery of C. Rickseckeri, the species of Cychrus 

 proper were limited in our fauna to two strictly Pacific forms, 

 angitlatus and tuberculatus, and one from Utah, C. Hcmphillii; 

 but the first-mentioned insect is reported by Mr. Ricksrckrr, in 

 a letter to me, to occur as far east as Clark's Ford, Mont. , though 



