104 HYDROPHILID A. 
very wide distribution in both hemispheres, though only one or two species have as yet 
been indicated from South America. ‘The species have not the aquatic habits of most 
of the other palpicorns, but inhabit the freshly dropped dung of herbivorous mammalia 
or decaying vegetable substances. It is one of the more neglected of the genera of 
Coleoptera, and the North-American entomologists have not completely worked out the 
species of their fauna. 
1. Cercyon seriatus. 
Rotundato-ovalis, convexus, nitidissimus, piceus, elytris nigro-piceis, corpore subtus rufo-piceo opaco, pedibus 
rufis ; antennarum basi palpisque testaceis; capite sparsim subtiliter punctato, prothorace fere impunctato ; 
elytris haud striatis, seriebus punctorum remotorum, internis subtilioribus, interstitiis impunctatis. 
Long. 2, lat. 12 lin. 
Hab. Panama, Volcan de Chiriqui, 2500 to 4000 feet (Champion). 
Palpi elongate and slender, clear yellow; basal joint of antenna extremely elongate, 
much arcuate. Head very shining, sparingly and very finely punctate. Elytra with 
regular series of punctures, which are scarcely deepened to form striz; the sutural series, 
however, is placed after the basal portion, on a distinct stria; the punctures of the 
outer series are much coarser than those near the suture, each puncture is separated by 
a broad space from the following ones; but the punctures of the internal series are 
rather linear, while the coarser external punctures are quite round. ‘The legs are 
elongate. 
This insect may be distinguished at a glance from its allies by the absence of 
striation on the wing-cases; the sculpture, combined with a similarity in size and form, 
give it a great resemblance to Cyclonotum centrale. It is described from a unique 
example. 
2. Cercyon mexicanus. 
Rotundato-ovalis, convexus, supra niger, nitidus, capite elytrisque ad apicem picescentibus, subtus piceus, 
opacus, pedibus rufis ; antennarum basi palpisque testaceis ; capite crebre sat fortiter, prothorace subtiliter, 
punctato; elytris striatis, striis versus apicem profundioribus, interstitiis posterius subconvexis, subtiliter 
sat crebre punctatis. 
Long. 2, lat. 14 lin. 
Hab. Mexico, Cordova (Sailé). 
Maxillary palpi elongate and slender for this genus; antenne with elongate basal 
joint and very elongate club. Head very distinctly margined in front, somewhat closely 
and not very finely punctate. Thorax very shining, finely and sparingly punctate; elytra 
with deep and distinct strie, which at the apex become deeper; the interstices are 
distinctly punctate, and are broad in front, but much narrower behind, and this, in 
conjunction with the greater depth of the striz, makes them appear there to be convex. 
The mesosternal lamina presents a quite slender lower face. 
