24 
Mr. C. J. Gahan on new 
From 8. damicornis , Linn., this species may be readily 
distinguished by the almost entire absence of punctuation 
from the elytra, as well as by the stronger and rugose punc- 
tuation of the underside of the head. In size, general form, 
and in the structure of the mandibles it agrees closely with 
8. damicornis . 
The species was described by Chevrolat (Ann. Soc. Ent. 
de France, 1862, p. 273) under the name 8. damicornis , 
Linn. — a very excusable error considering that the descrip- 
tions and figures of the latter species given by the older 
authors are equally applicable to the present species. 
I am satisfied that the S. damicornis of Linnaeus is cor- 
rectly determined in the British Museum collection, as all the 
specimens are from Jamaica — the locality ascribed to it by 
Linnaeus and Drury — and agree with a specimen so named 
in the Banksian collection. In all these specimens the elytra 
are scarcely glossy and are very finely and rather closely 
punctulate. The underside of the head is strongly enough, 
but not rugosely, punctured. In the fully-developed males 
the dorsal ridge of the mandible disappears gradually in front ; 
in the males of 8 . Chevrolati this disappearance of the dorsal 
ridge is more abrupt. 
From S. exsertus , Oliv., the males of S. Chevrolati may be 
distinguished by the strong inner tooth on each of the man- 
dibles near its apex, and by the somewhat coarser punctuation 
of the underside of the head. I am unable to give characters 
which shall sufficiently distinguish the females of these two 
species. Locality and the character of the punctuation of 
the underside of the head may perhaps serve as helps. The 
specimens of 8 . Chevrolati in the British Museum collection 
are from Cuba, with the exception of one (a female) from the 
Bahamas ; those of 8. exsertus are from St. Domingo. 
It is highly probable that the 8 . capra of Dejean and the 
8. Icevigatus of Beauvois, both from St. Domingo, are forms 
of minor development of 8 . exsertus . The only differences I 
can detect relate to size and to the form of the mandibles, the 
latter in 8 . capra and S . Icevigatus approaching more to the 
female form. 
Mallodon bituber culatum y Beauv. 
Judging from the figure and description of this species it 
seems to me that it is the female of Mallodon maxillosum 
Drury. 
