164 
REPORT ON ZOOLOGY, MDCCCXLIT : 
8c. Bacchus, from Swan River, Sc. Lenceus, from New Holland, Sc. 
Silenus, from Swan River ; a fourth is afterwards added (p. 157), Sc. 
MacLeayi, from New South Wales ; but it appears to me to be the same 
with Sc. rotundipennis, Dej,, which is also found in Van Diemen’s Land. 
(Vid. Arch. 1842, 1 Bd. p. 95.) 
Gnatlioxys, Westwood (Arcan. Ent. p. 89, t. 23, f. 2, 3), a distinct 
genus, whose position is still doubtful ; the habit is like Scarites, as is 
that of Baripus and Cnemacanthus ; the head small, and the mandibles 
simple like Pterostichus ; the antennae and the exteriorly dentated tibiae, 
as in Scarites, in which group the genus may for the present stand ; the 
mentum is toothless on the emargination ; the tarsi seem to be simple. 
To the two species figured. On. granularis and irregularis, from Port 
Essington, Reiche (Rev. Zool. p. 121) has added two other species, 
O. ohscurus and citatricosus, from Swan River ; and Westwood after- 
wards remarks (Arc. Ent. p. 158), that he has seen two East Indian 
species of this genus in Paris. 
Mystropterus, Chaudoir (Bull. Mosc. p. 844), a genus of Ditomidce, 
distinguished from Pachycarus, Sol. {cyaneus, 01.), by the presence of 
a sharp tooth on the mentum, founded on the Pit. cceruleus, Brull. Exp. 
d. Moree. 
Chilotomus, Chaudoir (ibid. p. 846), founded on the Bit. chalyhceus, 
Paid. Col. Pers. Armen., without a tooth on the mentum, with united 
elytra, and the thorax produced behind. 
Brachycoelus, Chaudoir (ibid. p. 848), a genus of Harpalidce, of the 
form of Cratocerus ; mentum with a broad tooth ; on the four anterior 
tarsi, the first four joints are widened, and have a thick coating of felt 
beneath. Br. Duponti, a new species from the Straits of Magellan. 
Loxomerus, Chaudoir (ibid. p. 851) is certainly identical with He- 
terodactylus, Guer. (vid. last year’s report, p. 206.) The new name, 
however, as the earlier one was no longer free, is as little superfluous 
as the exact description. The species is called L. nebrioides, and is the 
same with Heterodact. nehrioides, Guer. 
Migadops, Waterhouse (Ann. Nat. Hist. ix. p. 136, t. 3, f. 2, 3), re- 
sembling Selenophorus ; the dilated tarsal joints of the male have a 
thick downy felt beneath ; a double tooth on the emargination of the 
mentum. In M. virescens, from Terra del Fuego, 31. falklandicus, 
from the Falkland Islands, 31. Darwinii and nigrocceruleus, from Terra 
del Fuego, the intermediate tarsi of the male are evidently dilated ; 
whilst, in the if. ovalis, from Terra del Fuego, the first two joints only 
are dilated in a slight degree. 
Megalostylus, Chaudoir (Bull. Mosc. p. 855), allied to Poecilus, with an 
obtuse rounded tooth on the mentum, and the first joint of the antennae 
very long ; founded on five species from New Orleans, which, however, 
are not described. 
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