of new genera and species of TenebrionidcB. 371 
more strongly margined ; the prosternal process produced 
and lanceolate behind, &c. 
Metisopus purpureipennis , n. sp. 
Oblong-oval, moderately convex ; head — save the ante- 
rior margin, which is reddish-brown — black, finely and 
not closely punctured ; prothorax glossy black, finely punc- 
tured, a small foveate depression — more or less marked — 
at each side the middle at the base ; elytra deep purple, 
the suture reflecting metallic green, glossy ; each elytron 
with eight — besides a short scutellar row — punctured 
stride, obsolete at apex ; intervals subconvex, minutely and 
sparsely punctulate, the 7th compressed and costiform 
from behind the middle to the apex; underside, legs and 
antennae dark chestnut-brown, shining. 
Long. 4^ lin. ; lat. elytr. 2 to 2\ lin. 
Hab. — Norfolk Island. Two examples. 
In one of these examples the prothorax is distinctly 
longer, and the elytra broader, than in the other, — possibly 
sexual differences. 
Cm.OKOCAMMA, n. g. 
This genus is near to Isopus : mentum convex and tri- 
carinate in the middle : head deeply immersed in prothorax, 
inclined, labrum nearly entirely concealed, epistomal suture 
well marked: prothorax convex, sides finely margined, 
gradually curvedly narroAved from base to apex ; apex 
arcuate-emarginate, front angles not produced ; base dis- 
tinctly bisinuate : scutellum triangular, very distinct, much 
larger than in Metisopus or Episopus : elytra more or less 
strongly narrowed from about the middle to the apex, 
which is a little produced and narrowly rounded ; pro- 
sternum a little convex — but scarcely compressed — before 
the coxae ; the process horizontal, produced and pointed 
behind, more or less strongly longitudinally concave or 
excavated : mesosternum subvertical in fr'ont and broadly 
and deeply excavated to the base : metasternum between 
the cox« not equalling in length the 2nd ventral segment : 
intercoxal process somewhat narrowly oval : lec/s short, 
robust, tibias nearly straight ; 1st joint of hind tarsi as long 
as the two following united: antennce as in Isopus : body 
oval, or oblong-oval (according to sex ?) ; the alternate 
