398 Mr. H. W. Bates on the Longicorn Coleoptera 
of Linneus, since Mr. White applies it to the Guiana in- 
sect, is the same species as the Fabrician; and therefore the 
name depressus, again having the priority, would stand. I 
have no means of deciding this point. Linneus gives Coro- 
mandel as the locality of his C. depressus; and Fabricius does 
not quote his name in the synonymy. I have received a pair of 
Steirastoma depressum from M. Deyrolle of Paris, as coming from 
Venezuela, under the name of “ St. difformis”’ of Dejean. It is 
considerably modified from the Guiano-Amazonian type, being 
more closely tomentose, and ochreous rather than grey in 
colour. 
2. Steirastoma melanogenys, White. 
Steirastoma melanogenys, White, Cat. Long. Col. in Brit. Mus. ii. p. 355. 
The male in this species has a strong tooth or spine on the 
inner edge of the fore tibize near the middle. This was oyer- 
looked by Mr. White ; otherwise his description, as cited above, 
leaves nothing to desire. This insect is the “ St. aculeata” of 
Dejean’s catalogue, according to specimens I have received from 
Paris. Cayenne examples do not differ at all from those found 
in the Amazon region. I met with the species only in the 
central parts of the Lower Amazons, at Obydos and Santarem. 
3. Stewrastoma ceenosum, nu. sp. 
St. modice elongatum, postice attenuatum, depressum, tomento 
cervino-fusco vestitum: capitis thoracisque lateribus et plagis 
magnis duabus elytrorum fuscis: elytris apice valde spinosis. 
Long. 10 lin. @. 
Head and labrum densely clothed with ashy-brown pile, the 
former punctured in front and marked with three fine longitu- 
dinal raised lines on the epistome, the central one extending to 
the vertex; the sides black. Antennz brown; the third joint 
beneath with three very fine spines placed widely apart. Thorax 
quadrituberculate on each side, the lateral prominence very large, 
trituberculate, and the tubercle near the fore angle prominent ; 
the dorsal surface depressed, punctured, tricarinate ; the central 
keel very faint, the lateral ones prominent, flexuous; densely 
clothed with light-brown pile, the sides with a stripe of a coffee-- 
brown colour between the lateral keel and the tubercles. Elytra 
depressed, elongate, subtrigonal; the centro-basal ridges pro- 
longed behind to the apex, gently curved outwards and granu- 
lated from the base to two-thirds the length, then flexuous and 
smooth to their termination: the surface faintly and sparingly 
granulate-punctate, with a few large granulations, besides, on 
the shoulders; light or tawny-brown in colour, with a silky 
gloss ; the sides have each two large irregular patches of a coffee- 
