20 Mr. C. J. Gahan on Longtcorn Coleoptera 
Almost entirely covered with a close but short tawny 
pubescence. Antenne (?) a little longer than the body, with 
the joints from the third to the tenth spined at their inner 
apex, with the spines of the third and fourth joints long and 
recurved, that of the fifth almost at right angles to the “joint, 
those of the following joints eradually becoming shorter and 
directed more forwards, until in the tenth the spine is little 
more than a sharp angulate process of the joint. Prothorax 
crossed above by about nine tolerably regular transverse ridges, 
exclusive of the raised anterior and posterior margins; fur- 
nished at the middle of each side with a rather feeble tubercle. 
Elytra each truncate and bispinose at the apex. Prosternal 
process feebly tubercled. 
This species is to be distinguished by the structure of its 
antenne from every knowu species of the genus. In colour 
and general appearance it most nearly resembles a variety of 
HT. plicatus, Oliv., which is characterized by the absence of 
the dark bands from the margins of the elytra. 
Hammaticherus Lacordaitret, sp. n. 
Plocederus Lacordairei, De}. Cat. 
H, bato similis, sed differt capite supra inter oculos distincte cari- 
nato ; antennis( ¢ ) articulis tertio quartoque solis spinosis, ceteris 
inermibus; prothorace supra minus regulariter plicato. 
Hab. Argentine: Buenos Ayres, Salta. 
Brownish black, with a yellowish-grey or greenish-grey 
pubescence. Prothorax with a conical tubercle on the middle 
of each side, with a callosity (stronger in the male) between 
this tubercle and the anterior marg gin; crossed above by about 
ten ridges in addition to the raised anterior and posterior 
margins. Elytra pitchy brown, with a faint yellowish-grey 
pubescence ; apices truncate, each bispinose. Legs greenish 
grey ; tarsi reddish tawny. 
g. Antenne more than twice as long as the body; third 
and fourth joints spined at the apex, with the spines turned 
strongly backwards ; fifth joint very feebly dentate near the 
apex, the remaining joints unarmed. 
o”. “Prothorax less regularly wrinkled above. Antenne 
a little longer than the body, with the third to fifth joints 
each armed with a recurved spine at the apex, the sixth to 
tenth joints denticulate at the apex. 
I have little doubt, considermg the very close agreement 
in colour, that the (wo specimens here described belong to the 
. . . 5 
same species. The male specimen is from Salta, the female 
from Buenos Ayres. 
