CYCLOTYPUS.—PEROCHTHES. 101 
Sparsim obsoletissime punctulato; elytris sparsim subtiliter punctatis, cumque seriebus punctorum 
majorum, internis ad basin subtilioribus. 
Long. 3, lat. 23 lin. 
Hab. Panama, Volcan de Chiriqui, 2500 to 4000 feet (Champion). 
The punctuation of the wing-cases, although very fine, is distinct ; the series of large 
punctures are remarkably distinct, and consist of rather distant large punctures, not 
placed in strive; the sutural series, however, after the basal portion, becomes a stria. 
The mentum shows an extraordinary sexual character in the male; its surface is opaque 
and flat and bears fine golden hairs, the base has a crista formed by such hairs very 
densely packed, and a similar crest divides the surface longitudinally in two halves; the 
edges and front are margined with fine hairs, which do not, however, form crests like 
the basal and middle series. In the female these basal and median crests are entirely 
absent, and the surface of the mentum shows a feeble punctuation and pubescence, as in 
many species of Cyclonotum. 
2. Cyclotypus latissimus. 
Subhemisphericus, supra niger, nitidus, subtus piceus, pedibus rufis; palpis antennisque testaceis, harum clava 
subinfuscata; capite minus sparsim punctato; prothorace valde transverso, nitidissimo, sparsim obsoletis- 
sime punctulato; elytris sat crebre fere fortiter punctatis, cumque seriebus punctorum majorum, internis 
ad basin subtilioribus, 
Long. 3, lat. 24 lin. 
Hab. Nicaracua, Chontales (Janson). 
This species is very closely allied to C. godmani, but the punctuation of the elytra is 
considerably less fine, and the outline of the two species is somewhat different, owing 
to the afterbody in C. latissimus being more narrowed behind. 
The species is described from a single badly preserved individual, which is apparently 
a female. 
PEROCHTHES. 
Corpus subhemisphericum, supra nitidum, glabrum, subtus opacum, sed vix pubescens. Antenne novem- 
articulate, articulo primo elongato, quam quinque sequentes longiore, articulis 79-9" clavam magnam 
compactam formantibus. Palpi maxillares parum elongati, articulo secundo incrassato. Prosternum 
brevissimum medio carinatum. Mesosternum in medio triangulariter prominulum. Coxe intermediz sat 
distantes, metasternum inter eas productum, cum mesosterno arcte conjunctum. Pedes breves, femoribus 
latis, tarsis brevibus, rigidis, quadriarticulatis. 
The relation of this genus to the Cyclonotwm group of genera, as well as to Cercyon, 
is considerable, although it is very different from any described form; the antenne and 
head are of the Cercyon type, while the structure of the pieces round the middle coxee 
is rather of the nature of what exists in Cyclonotwm. The prosternum is excessively 
reduced on each side, so that a gap is left between the central piece and the side piece 
on each side; this central piece is slightly produced in front in the middle, and is 
