42 
collection, the C. depressus of Fabricius is the same as the C. 
hrevis of Sulzer, an earlier author, and applies to the larger spe- 
cies of South Brazil above mentioned. I think, however, the 
description of Fabricius quoted above cannot apply to any other 
than the one I have described. It is probable, also, that 
Sulzer and the other old authors had the Guiana species 
in view in their C. brevis ; for the productions of Brazil were 
not known in Europe at the time they wrote. I do not adopt 
Sulzer^s name, however, because it is likely that the C. depressus 
of Linnseus, 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. Linnseus 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 tibiae near the middle. This was over- 
looked by Mr. White ; otherwise his description, as cited above, 
5 \ 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. Steirastoma ccenosum, n. 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. Antennse 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 
