Ky SET) 
XXVII. Descriptions of new Longicorn Coleoptera from 
India, Japan, and Africa. By Cuartes O. WatTER- 
HOUSE. 
[Read August 3rd, 1881. | 
Some collections recently received have furnished many 
interesting novelties among the Longicorn Coleoptera. I 
give here descriptions of a few of them. Among the 
Prionde is a new Cacoscelis, which I propose to call 
C. latus on account of its being one-third broader than 
either of the known species. The second is a Macrotoma, 
remarkable among its brown or black congeners by 
having metallic-green elytra. Among the Cerambycide 
is one most remarkable new genus, apparently allied to 
Megacelus, with short strongly dentate (almost pectinate) 
antenne, and with the apical segments contracted, 
excavated in the middle, and laminated at the sides of 
the excavation. Mr. Bates has two examples from West 
Africa, and there is a single specimen of an allied 
species from §.K. Africa in the British Museum : all three 
females. The general appearance of the insect reminds 
one of the genus Hletica among the Cantharide. 
Among the Lamiude is an interesting new species of 
Echthistatus from Japan, being the second species received 
from that country; and avery fine Monochamus allied to 
our European M. sartor, but very distinct ; the antenne 
of one of the examples measure 43 inches in length. 
PRIONIDA. 
Cacoscelis ? latus, n. 8. 
Piceus, subtus nigro-piceus, latus, depressus ; capite 
ruguloso, thorace fortiter rugoso, lateribus impressis 
post-medium emarginatis, elytris opacis, confertim sub- 
tiliter punctatis et rugulosis. ?. long. 24 hnn., lat. 
9 lin. 
Much broader and more depressed than C. edipus, 
White. The head is not narrowed behind the eyes, 
which are in consequence not prominent ; all the surface 
TRANS. ENT. soc. 1851.—PaRT Il. (SEPT.) 
