ro 
Horn. | 008 [April 19, 
genera first mentioned, the eyes are round, moderately promi- 
nent, coarsely granulated, and in Anchomma small, not promi- 
nent, and completely divided by the sides of the head. 
These characters seem to indicate two sub-tribes. 
Anterior coxe open behind. Eyes entire........ sub-tribe RHAGODERINI. 
Head narrowed behind, forming a distinct neck............ Rhagodera. 
Anterior coxze closed behind. Eyes divided...... sub-tribe ANCHOMMINI. 
Head not narrowed behind............ aytsierQtsb tle Sisal eetse Anchomma. 
The latter genus appears not to have any allied form yet 
described. Ahagodera is plainly akin to Corticus, aud proba- 
bly Sarrotrium and Diodesma, which I have not examined in 
nature. In Corticus the head is not narrowed behind into a 
neck, and the posterior coxze are so placed that even the most 
poetic imagination cannot call them contiguous, they are 
really distant, and this one fact goes far in exhibiting the 
entire absence of accuracy and fact in the characters used by 
Erichson in defining his tribes. 
The genera representing this tribe in our fauna are from 
the Pacific Region. 
RHAGODERA Erichs. 
Antenne inserted under the margin of the front, not retractile, 11-jointed, 
moderately short, slightly flattened, joints perfoliate, sparsely clothed with 
short, scale-like hairs; first joint more slender, and not longer than second, 
third joint nearly as long as the three following together ; joints 4-10 trans- 
verse, very gradually broader, eleventh narrower than the tenth and oval 
acuminate at tip. Head horizontal, as broad as long, sides of front dilated 
over the insertion of the antenn, suddenly narrowed behind. Eyes en- 
tire, coarsely granulated, moderately prominent. Mentum transverse, gula 
deeply emarginate, its angles acutely prolonged to the front, it sides form- 
ing a distinct ridge beneath the eyes. Mavxille visible beneath. Labrum 
short, transverse, almost entirely concealed by the epistoma, the latter 
feebly emarginate at middle. Thorax as wide as the elytra, apex emargi- 
nate, base arcuate at middle, and acutely sinuate on each side, side margin 
acute, serrate. Elytra oblong, humeral angles moderately prominent, disc 
acutely carinate. Scutellum small. Anterior coxee small, moderately dis- 
tant, prosternum more elevated than the coxee. Posterior coxee narrowly 
separated, intercoxal process moderately long, obtusely rounded at tip. 
Abdominal segments 1-4 gradually shorter, fifth slightly longer than the 
fourth. Tibize slender, but gradually broader to tip. Apex fimbriate with 
short spinules without terminal spurs. Tarsi short, clothed beneath with 
