198 Mr. H. W. Bates on the Longicorn Coleoptera 
parvo, infra oculos brevissimo, contracto ; antennis grossis, filifor- 
mibus, corpore paulo brevioribus, fuscis; elytris humeris subfalcatis, 
maculis duabus nigris utrinque basalibus ; abdomine plagis duabus 
basalibus nigris. Long. 3 lin. 
S. Paulo, Upper Amazons. 
Genus TrssARECPHORA, Thomson. 
Thoms. Archiv. Entom. i. p. 77. 
The chief differences which M. Thomson assigns as distinguish- 
ing this genus from Compsosoma are the swollen and densely 
hirsute third and fourth joints of the antenne, and the elevated 
shoulders and centro-basal ridges of the elytra. To them may 
be added the convexity of the front part of the head, and the 
extension of the lower part considerably below the narrow, oblong 
and scarcely convex eyes. The Compsosome, so far as at present 
observed, are found in their perfect state only on woody stems 
or trunks of trees; Tessarecphora arachnoides I found only on 
the foliage of Mimosa trees. 
Tessarecphora arachnotdes, Thomson. 
Tessarecphora arachnoides, Thoms. Arch. Entom.1. p. TT es Mig! eRe 
T. ovata, nigra, nitida; capite coriaceo, opaco; antennis articulis 6°-7™ 
albis et albo hirsutis, 8°-11™ fere nudis ; thorace et elytris lineolis 
reticulatis cinereis, his carinis centrobasalibus conico-elevatis et 
longe penicillatis, humeris faleatis et valde oblique elevatis. Long. 
4 lin. : 
- I found this exquisite little insect only in the forest of Obydos, 
in the month of March, on the foliage of Mimosa trees. 
Genus AURENEA, Thomson. 
Thomson, Archives Entom. i. p. 298. 
This genus is closely allied to Compsosoma, but differs in 
several points, admitting of clear definition. The antennz are 
destitute of the dense fringe which exists in Compsosoma, and 
are furnished with scattered hairs. The face is broad and plane, 
and the muzzle quadrate and prolonged below the eyes. The 
mesosternum has a conical horizontal projection in front; and 
the prosternum is longitudinally convex or keeled, and sometimes 
vertical on the posterior face. The general form of body and 
the structure of the legs and tarsi are very similar to the same 
features in Compsosoma. ; 
1. Afrenea albilarvata, n. sp. 
AE. breviter ovata, fulvo-brunnea, fronte fascia lata cinerea albo 
marginata, thorace lateribus castaneo-fuscis, elytris prope apicem 
fascia lata curvata grisea; antennze parce breviter setosze arti- 
Sinkaces kee 
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