76 



is, with the exception of Dejeanii, the largest of the group, and 

 is, in sculpture, intermediate between californicus and Audou- 

 inii. The head and thorax are much smoother than in the 

 former species, while its very much larger size, and the ex- 

 tremely deep transverse fovea of the thorax, will serve to dis- 

 tinguish it from the latter. 



I am not aware whether the two last named species were 

 published by Mr. Crotch, but I know that careful descriptions 

 of them were drawn up by him, and that he communicated them 

 to friends in Europe and elsewhere under the names which I 

 have here adopted. Henry Edwards. 



San Francisco, May 7, 1875. 



On the Insect Fauna of the White Mountains. 



New Hampshire holds within her limits as a State, a region 

 which is proving itself more interesting to the entomologist 

 than any other in the United States east of the Rocky Moun- 

 tains. The summit of Mount Washington, with an elevation 

 of 6293 feet above the sea level, and with a climate giving an 

 average temperature of 47.7° during its short summer, and that 

 of Mount Adams, might well harbor species peculiar to a re- 

 stricted locality and contrasting in character with the insect 

 species afforded by the rest of New Hampshire and the New 

 England States, which would throw important light on the 

 questions of the effects of isolation and interbreeding on specific 

 forms ; and if the Glacial Epoch had aught to do with the dis- 

 tribution of the insects, we might expect these summits to har- 

 bor, as on aerial islands, species coming from a remoter north, 

 valley inhabitants during the continuation of the cosmical win- 

 ter, which ascended to the summits to find their congenial 

 climate as the lengthening; summers laid the mountains more 

 and more bare of ice. Evidence of this seems to be afforded 

 by the scientific labors of Mr. S. H. Scudder on the Grasshop- 

 pers and Butterflies. Say has described a species of the genus 

 Oeneis from the summit of Mount Washington, whose congeners 

 inhabit Labrador, Siberia, the Alps, the Ural and Rocky Moun- 

 tains, and, from a study of specimens, it seems to be concluded 



