152 RHYNCHOPHORA. 
Hab. Nicaraaua, Chontales (Belt). 
This new species is represented by a single specimen only. The structure of its 
antennal club approximates to that of Phleotrupes, which the species does not resemble 
in other structural points. It cannot yet be associated as the opposite sex with any 
other described form. 
3. Phleoborus scaber. 
Phleoborus scaber, Er. Wiegm. Archiv, 1836, 1, p. 55 * 
3. Phileoborus sericeus, Chap. Syn. Scol. p. 13 (Mém. Soc. Liége, 1873, p. 221)’. 
Oblong-oval, obscure piceous or piceous black, subopaque with a dull sericeous gloss, due to a fine close 
shagreening of the interspaces between the rugs of the thorax and elytra. Eyes approximate above and 
below ; front above the eyes simply punctate, below, together with rostrum, with close variolose confluent 
punctuation ; rostrum (¢) narrower, proadly but not deeply impressed, carinate in the middle, and: 
margined with an elevated ridge before the antennal fossa; rostrum (  ) broader, flattened but scarcely 
impressed, carinate, but without the lateral ridges. Prothorax transverse, widest shortly before the base, 
the sides rounded, the anterior angles muricate and therefore evident in the females, and sometimes in 
well-developed males; surface rather densely asperate, the asperities conjoined in irregular lines, and 
sometimes obsolete at the base, which may be marked with large umbilicate punctures, usually confluent 
along the hind margin, median line variable, usually well-marked and subelevated behind, especially in 
the female, not always reaching the apex in front, disc between the median line and the middle of the 
sides with a smooth, sometimes foveolate, patch ; flanks foveolate in the female. Scutellum oblong-ovate, 
variable, sometimes impressed. Elytra subparallel-sided, with fine impressed punctured striz ; interstices 
nearly flat, dull, with numerous isolated rugs, transverse and irregularly biseriate to beyond the middle 
(in the male, sometimes uniseriate on the 4th interstice), then becoming uniseriate, tuberculiform, and 
obsolescent at the apex of at.least the two inner interstices ; the tubercles and ruge bearing single very 
-. Short sete, hardly distinguishable in the female. 
“Jength, ¢,6-8 millim.; 9, 8-9-2 millim. 
Hab. Mexico, Orizaba (Sallé), Cordova (Sallé, Hoge) ; GuATEMALA, Pantaleon 
(Champion); NIcaRAGua, Chontales (Janson); Panama, Bugaba, Volcan de Chiriqui 
(Champion).—CoLoMBIA * ; Gurana, Cayenne?; BraziL??. 
Perhaps the commonest species of the genus. We have received twenty specimens 
from Central America, of which one alone possesses the propleural fovee. Assuming 
this to be a sexual character, the form which lacks the fovee is the male, as has been 
ascertained by dissection. As the female specimen in question has some other 
differences from the corresponding males taken at Bugaba—greater gloss, stronger 
sculpture, the asperities traceable to the apex of the elytra,—I regarded it at first as a 
distinct species ; and it was not until long after my original examination of the genus 
that the discovery in Mr. Fry’s collection of examples from Santa Catherina, which 
were absolutely alike save in the presence or absence of the foveee, made it manifest 
that this was in all likelihood a sexual distinction. The male (P. sericeus, Chap.) is the 
commoner sex and is rather more uniform in sculpture than the female ; my example of 
P. scaber, named after comparison with the specimens in Chapuis’s collection, is simply a 
