49 
first group, which might be designated by the name water- 
housei Sharp and listed as a phase or variety of the species 
honoluluensis Water.; second, along lines of degeneration and 
simplification of structure, including all members of my second 
group, and to be designated as the typical form; and third, 
along lines of great modification as regards the mandibles and 
anterior tibiae, a result, I think, of becoming more adapted to 
a subterranean mode of life, producing a phase which I would 
designate as the phase or variety palmatus n. var. 
For the opportunity to study this most interesting group 
of beetles I must thank the following good friends: Mr. W. 
M. Giffard, Mr. Preston Clark, and Mr. O. H. Swezey. Mr. 
Giffard in particular aided me in every way that was possible. 
A New Species cof Rhyncogonus (Rhynchophorous 
Coleoptera), from the Island of Kauai, 
Hawaiian Islands. 
BY EDWIN C. VAN DYKE, 
University of California, Berkeley, Cal. 
(Presented by title by W. M. Giffard at the meeting of 
December 1, 1921.) 
Rhyncogonus alternatus n. sp. 
Robust, very convex, blackish-brown, the tibiae and_ tarsi 
scmewhat reddish; head with rostrum slightly longer than 
diameter across the eyes and coarsely, somewhat strigosely 
punctured above, the punctures of the front more rounded, and 
finer posteriorly, the surface sparsely clothed with light-brown 
hair, denser in the supraorbital region, the antennae with the 
first and second joints of the funiculus of about equal length; 
the prothorax broader than long, with sides almost parallel in 
basal half and slightly rounded and convergent anteriorly, the 
‘disc coarsely, cribrately, and irregularly punctured, with a 
smooth median longitudinal line, the surface sparsely pilose, 
like the head but with a tuft of lighter colored hair near the 
posterior angles; the elytra somewhat longer than broad and 
twice as broad as prothorax, very convex, even in the male, 
and with the carinate margin only evident near the humeri, the 
Proce. Haw. Ent. Soec., V, No. 1, October, 1922. 
