396 Mr. H. W. Bates on Ceramhycidce 
ascendente, secunda (primse proxima) recta transversa, 
tertia longe distante versus apicem ; pedibus piceo-rufis 
vel nigris^ femoribus ut in N, rufo (Oliv.) gradatim crasse 
clavatis. 
Long. 34-7 lin. ^ . 
Hah. — Santarem, Tapajos^ Ega. 
Abundant occasionally on wooden fences of gardens. 
The yellow belts of the elytra are all of nearly equal width, 
and form moderately wide fasciae, and not fine lines as 
in N. Tufus and other allied species. 
Genus Mecometopus. 
Thomson, Classif. des Ceramb. p. 222. 
Lacordaire unites this genus with Neoclytus, but it 
seems to me to form a distinct and very natural group, 
distinguished from Neoclytus by the very much shorter 
and less robust hind legs, which are in due proportion 
to the anterior and middle pair. The muzzle is in almost 
all the species longer and narrower than in Neoclytus. 
All the known species are from tropical America. 
1 . Mecometopus Batesii. 
Clytus Batesii j White, Cat. Longic. Brit. Mus. p. 257 * 
Bobustus, niger, corpore subtus thoraceque tomento 
ochreo variegatis, elytris l^te croceo-flavis, macula elon- 
gata humerali, altera obliqua rhomboidea lateral! pone 
medium, et apice nigris; thorace magno, elytris multo 
latiore, subgloboso, dorso linea lata elevata transversim 
rugosa. 
Long. 6 lin. 
Hah. — Banks of the Irura, Santarem. On dead trees. 
2 . Mecometopus festivus. 
Clytus festivusj Fab. Syst. El. ii. 348. 
Cylindricus, ater ; thorace breviter oblongo-rotundato, 
elytris hand latiore, vage late cinereo fasciato ; scutello, 
elytrorum vitta abbreviata obliqua prope basin, macula 
