Two new Genera of Coleoptera. 521 
little narrower than the head, arcuately narrowed in front, a 
little longer than broad, margined. Scutellum small, rounded 
posteriorly. Elytra elongate, gradually widened posteriorly 
and then arcuately acuminate. Metasternum large, rather 
flat; the episterna wide, a trifle narrower posteriorly than 
in front. Anterior coxe subglobose, moderately prominent. 
Intermediate coxe contiguous, gently convex, parallel, longer 
than broad. Posterior coxe triangularly enlarged interiorly, 
attenuate towards the sides. ‘larsi rather long, hairy beneath, 
five-jointed, the posterior pair with the basal joint as long as 
the three following taken together; the second and third 
joints rather broad, crescent-shaped, with the apical angles 
produced ; the fourth joint somewhat similar, but smaller and 
narrower. ‘The abdomen is very gently convex, even, not 
transversely folded. Body clothed with scales. 
This remarkable insect is closely related to Cupes, but 
differs in the extraordinary form of the head. The antenna 
are smooth and shining, and when at rest lodge in two deep 
grooves on the underside of the head. ‘The structure of the 
tarsi is also different, and they are more hairy beneath. 
Tetraphalerus Wagner’, sp. n. 
Elongatus, griseo-fuscus, opacus; capite elongato, pone oculos 
quadricristato ; antennis piceis, nitidis ; thorace elongato, antice 
arcuatim angustato, supra tuberculis nonnullis piceis ornato, 
marginibus cariniformibus, obtuse serrulatis; elytris carinatis. 
Long. 15 mm. 
Hab. Rio Janeiro, Cerra das Organas (/. R. Wagner). 
The head in front of the eyes is slightly narrowed, flat- 
tened above, truncate in front; behind the eyes it is wider, 
longitudinally impressed between the posterior crests. Above 
each eye there is a short transverse crest, and at the back of 
the head on each side a longer, slightly curved, oblique crest. 
The antennal grooves beneath are very strong and have on 
the outer angle of the posterior opening a somewhat triangular 
prominence, which is visible when looking at the insect from 
above. The mandibles are very prominent, vertically com- 
ressed and dilated, bisinuate at the apex. The antenne are 
scarcely so long as the head and thorax together, slender, 
smooth ; the basal joint is not very large, the second smaller, 
the third and fourth slightly elongate, the following joints 
longer, the terminal one somewhat acuminate. The thorax 
is a little narrower than the head, longer than broad, arcuately 
narrowed in front, gently convex, clothed with grey scales, 
with a few scattered pale sandy scales; the sides posteriorly 
Ann. & Mag. N. Hist. Ser 7. Vol. vii. 36 
