INSECTA — COLEOPTERA. 
189 
Aphodius erosus of the reporter is a new species from Van Diemen’s 
Land (Arch. 1842, i. p. 157). 
To the Trogidce the reporter has had the Trox australasice, Latr., 
from Van Diemen’s Land (ibid. p. 158). 
Germar has written an excellent monograph on the spherical Trogidce 
(Zeitschr. iv. p. 109, t. 1). They form four genera; some are completely 
spherical (the posterior angle of the prothorax quite rounded) : Sphcero- 
morphus, with ten-jointed antennae, broad flat tibiae, long and thin tarsi, 
contains fifteen species from different parts of America,, hitherto all un- 
described; Sgnarmostes, with nine-jointed antennae, broad flat tibiae, 
short tarsi : containing two species from Madagascar, Acanthoc. tibialis, 
KL, and scabrosus, Laporte. In the others, the sphere is incomplete 
(the prothorax has blunt angled posterior comers) : Cloeotus has nine- 
jointed antennae, triangular tibiae, short tarsi; two new species from 
Columbia. Lastly, Acanthocerus, MacLeay, with ten-jointed antennae, 
triangular tibiae, pretty long tarsi ; nineteen species, of which seven have 
already been described in different places, and one {aphodioides) even 
under four names. Thus thirty-eight species are known ; of these, two 
are from Madagascar, the others belong exclusively to America; for 
A. senegalensis, Lap., owes its name to an error in its locality, which 
is Cayenne, so that Dejean’s name of A. striatus should be employed. 
Mulsant has enriched the Geotrwpidce with one new genus, Thorectes 
(Col. Fr. p. 367), which differs from Geotrupes by the soldered elytra, 
rudimentary wings, and the club of the antennaB, in which, when it is 
folded up, the middle fold is not concealed ; G. Icevigatus, F. The name 
is synonymous with Thorictus, Germ. I cannot convince myself of the 
utility of this genus, and would rather consider it, as well as Cerato- 
phyus, as a sub-genus of Geotrupes. 
Mulsant has enriched Bolbocerus (ibid. p. 350, t. 1, f. 15, 16) with 
a distinct new European species, B. gallicus. It has much similarity to 
B. JEneas, but the upper side is glossy black, the scutellum not dotted ; 
different from the North African B. bocchus, by the simple conical head- 
horn of the male, &c. Many New Holland species of this genus have 
become known, principally belonging to the north and west sides. Bain- 
bridge (Trans. Ent. Soc. of Lond. iii. p. 79) has described a series of 
them: B. Kirby i, latus (same with B. frontalis, Guer. Voy. de le 
Favorite, both females), serricollis, hastifer (same with Athyreus recti- • 
cornis, Guer., ibid., but really a Bolbocerus), 7-tuberculatus, Jissicornis, 
trituberculatus. The first species is from Melville Island, the rest from 
Swan River. Hope (Proceed. Ent. Soc. p. 43) also describes B. Kirbyi, 
from Port Essington, besides three new species, B. neglectus, rotunda- 
tus, both females ; B. rubescens. The two latter are amongst the smallest 
species. The reporter (Arch. 1842, i. p. 105) has shown, that the 
genus Elephastomus, MacL., is untenable, as E. proboscideus is only 
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