Mr. C. J. Gahan on Longicorn Coleoptera. 19 
when food is not so abundant. The apparent rarity of sexual 
propagation, which might possibly lead to the formation of 
cocoons so small as to be readily carried about by the wind, 
may have something to do with this encystment. The cysts 
are small enough to travel very easily, and the wide distribu- 
tion of the species may have been thus brought about. 
I11.—Notes on Longicorn Coleoptera of the Group Cerambycine, 
with Descriptions of new Genera and Species. By CHARLES 
J. GAHAN, M.A., Assistant in the Zoological Department, 
British Museum. 
[Concluded from vol. vii. p. 34.} 
In my two papers on this group of Longicornia which have 
already appeared I have dealt with African, Indo-Malayan, 
and Australian species. ‘lhe present contribution is confined 
to South-American species of the group. 
Hammaticherus macrus, Bates. 
Mr. Bates’s clear description of this species leaves no room 
for doubt that it is identical with the Hammaticherus bellator 
of Dejean’s collection. It is very doubtful, however, whether 
Serville’s description could possibly have been drawn up 
from the same species ; if it 1s to be accepted as accurate we 
must regard the /. bellator of Serville as a species allied to 
but quite distinct from H. macrus, Bates (=H. bellator, 
Dej.). It may be remarked that in the latter species the 
anterior cotyloid cavities are distinctly open behind, while in 
all the other species known to me they are completely or 
almost completely closed in behind. 
Hammuticherus consobrinus, sp. 1. 
Plocederus consobrinus, De}. Cat. 
Fulvo sat dense pubescens; prothorace supra transversim regula- 
riterque plicato, lateraliter in medio modice tuberculato ; elytris 
fulvescentibus, apicibus truncatis, utrisque bispinosis; articulis 
antennarum a tertio ad decimum apice intus spinosis, articulis 
tertio quartoque spinis recurvis. 
Long. 26, lat. 8 mm. 
Hab, Cayenne (Lacordaire). 
