PSYCHE 
VOL. XXXV. MARCH 1928 
No. 1 
NEW COLEOPTERA FROM WESTERN HOT SPRINGS 1 
By P. J. Darlington, Jr. 
The three descriptions brought together in this paper are of 
widely different species which have in common only aquatic 
habits and an apparent preference for thermal water. They 
were collected with a number of described species by Professor 
C. T. Brues in Nevada, Oregon, and California during the summer 
of 1927, and are described now so that the names will be available 
for use by Professor Brues in his paper on the hot spring fauna, 
which will probably appear in the Proceedings of the American 
Academv of Arts and Sciences. 
I am indebted to Mr. Nathan Banks and Director Thomas 
Barbour of the Museum of Comparitive Zoology at Cambridge 
for permitting me to study the types of Ochthebius and Helmis 
in the LeConte collection, and to Mr. H. C. Fall for the oppor- 
tunity of examining some of the types of his species of Codambus. 
By arrangement with Professor Brues, the holotype, allo- 
type if any, and some of the paratypes of each species will be 
deposited in the Museum of Comparative Zoology, Cambridge, 
Massachusetts. 
Coelambus thermarum n. sp. 
Moderately elongate, oval. Front not margined. Head 
and pronotum piceous, the former with a small spot on the 
vertex, the latter with the side margins, vaguely paler; elytra 
pale testaceous and semi-transparent except for the fuscous 
Contribution from the Entomological Laboratory of the Bussey Institu- 
tion, Harvard University, No. 288. 
