120 Mr. H. W. Bates on the Longicorn Coleoptera 
male is strongly bisinuated at the tip. Anterior femora dilated ; 
tibiee curved and grooved within. Antenne capilliform. : 
Taken at Santarem. The distinctness of this species from the 
foregoing depends more upon the structure of the ventral apical 
segment than on the general colour and clothing, which seem to 
be variable in these species. 
8. Atthomerus Lacordairei, n. sp. 
Af. subcylindricus, cano-tomentosus, fronte, vertice et thoracis yitta 
dorsali violaceo-brunneis: elytris utrinque apud humeros macula 
magna lineata alam mentiente instructis, in medio prope basin 
fuscis, apices versus canis tuberosis. Long. 6} lin. g 2. 
Head rather breader, and front more plane, than in the preeed- 
ing species ; epistome and cheeks hoary white, rest of the head 
dark brown ; antennz yellowish, partially clothed with fine hoary- 
white pile. Thorax somewhat rugose transversely; lateral tuber- 
cles acute, dorsal ones only slightly raised, hoary white, a broad 
stripe of a violet-brown colour down the centre. Elytra with the 
centro-basal ridges short, obtuse, punctate-granulate, chiefly in 
rows, but more confused in the middle towards the base; on 
each side near the shoulders is a large yellowish spot traversed 
by the rows of granulations, which are of a darker colour and 
varied by discoloured punctures in the interstices, the whole 
producing an imitation of a wing; the basal space between the 
two spots is blackish; the apical half of the elytra is hoary- 
white, tomentose, varied with dusky, and having white tubercles 
in rows continuous with the granulate punctures of the basal 
part. Body beneath and legs yellowish testaccous, clothed un- 
evenly with hoary-white tomentum. Fore femora and tibize 
simple. The antenne in the male are about three times, in the 
female about twice, the length of the body. 
Taken at various places on the Lower and Upper Amazons, 
closely clinging to dead boughs. As I have before stated, this 
species is the Alphus Lacordairei of Dejean’s Catalogue, accord- 
ing to French collections. 
Genus Myoxrnus (Dej. Cat.?), nov. gen. 
Head narrow across the vertex, the antenniferous tubercles 
being very prominent and directed upwards. Antenne simple, 
the basal joint pyriform-clavate, though somewhat slender, 
shorter than the third. TPalpi with their terminal joints slender 
and pointed, as in Lamiaires generally. Thorax with the sides 
furnished with a short simple spine, without conical tubercle ; 
the disk having three smal] acute tubercles. Elytra with short, 
strongly raised and abrupt, crested ccntro-basal ridges; their 
tips rounded. Mesosternum narrowed behind, but broader than 
