S6 
PSYCHE 
[August 
Very closely allied to the [treceding species, the chief differences being as 
l(.)llo\vs : The color is more brightly Itronzed than in our native specimens of 
aquaticus, the general form more elongate, the prothorax distinctly less trans- 
verse and slightly more narrowed jiosteriorly, tiie elytra more elongate and 
more oval, wdest behind the middle, narrowing a little anteriorly, the humeri 
in consequence less strongly rounded ; elytral striae a little more finely punctate 
and as a rule less completely effaced at apex. Tire tibiae are apparently always 
dark : the hasal joint of the antennae, except very rarely, is entirely dark ; joints 
2-4 pale beneath, usually dark above, but sometimes only slightly so. In 
aquaticus the first four joints are pale beneath. 
This species is the most truly horeal or alpine in distribution of any in 
our fauna. It has been taken b\' Mr. Hlanchard on or near the treeless summits 
of Mts. ^Vash’ngton and Lafayette in the White Mountains of New Hampshire, 
and by Mr. Leng on Mt. Marcy, the highest peak of the Adirondack's, tlie 
l)eetles lieing obtained, writes Mr. Leng, "by sifting the mosses that flourish 
in sheltered places among the otherwise bare rocks of the summit.” Specimens 
closely in accord with these have heen sent me by Dr. lilaisdell, wdio took them 
at Nome, Alaska. 1 have, under aquaticus. expressed the sus])icion that the 
Alaskan specimens recorded Iw Sahlberg as aquaticus were really the present 
species. 
The name borealis is adopted from the Harris Correspondence, published 
by Scudder in 1869. It was used by Dr. Harris in a letter to Dr. LeConte 
( Jan. 23, 1849) for a specimen taken in the Vdiite Mountains by Mr. Tucker- 
man. Mr. Illanchard writes that “this s]recies is at present rci)resented in the 
Harris collection l)y a single female specimen without name, numbered 1680, 
and referred to by nnmljer only in the AIs. catalogue as having been collected 
by Mr. Tuckerman at the White Mountains in 1838. The specimen now bears 
the label liardyi." which has of course, been attached comparatively recently. 
There can he no donbt whatever that this specimen is the true borealis of the 
"Correspondence,” and though the brief allusions therein do not fairly constitute 
a description, still, as no snhsequent descri] 4 ion has been written and no 
synonymy is involved, I have chosen to quote Harris as the author of the species. 
5. X. simulator, n. sp. 
This species greatly resembles a(iuaficus but is always separable by the two 
ajiical annulate |>unctnres. In addition, the size is a little smaller, the elytral 
striae decidedly finer, becoming effaced at ;i greater distance from the apex, the 
