219 
1. Compsosoma Mniszechii, Thomson. 
Compsoso-na Maiszechii, Thoms. Archiv. Entom. i. p. 74, pi. 9. f. 4. 
C. oblongo-ovatum, crassum, convexiirn, hirsutum, grosse punctatum, 
elytris nigro-tnberculatis ; thorace fuligiiioso, vitta lata cinereo-fulva; 
elytris humeris rotmidatis, plaga humerali fuliginosa (fulvo tincta), 
deinde utrinque vitta lata obliqua cinereo-fiilva, parte postica fuli- 
ginosa, medio fulvo-sericea, sutiiraque cinerea; pectore utrinque 
plaga cretacea ; antennis filiformibus, hirsutis. Long. 7 lin. 
I found a few examples only of this fine species, on the slender 
stem of a jmuiig tree, in the forest at Ega, Upper Amazons*. The 
lower part of the face is extremely short, scarcely extending 
below the eyes ; the latter are large and convex. 
2. Compsosoma terrenum^ Pascoe. 
j^renea terrena, Pascoe, Trans. Ent. Soc. n. s. vol. i. p. 25. 
G. parvum, ovatum, obscure fulvum, undique breviter setosum ; capite 
parvo, infra oculos brevissimo, contracto ; antennis grossis, filifor- 
mibus, corpora paulo brevioribus, fuscis; elytris humeris subfalcatis, 
maculis duabus nigris utrinque basalibus ; abdomine plagis duabus 
basalibus nigris. Long. 3^ lin. 
S. Paulo, Upper Amazons. 
Genus Tessarecphora, 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 antennae, 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 Compsosoma, so far as at present 
observed, are found in their perfect state only on woody sterns 
or trunks of trees ; Tessarecphora arachndides I found only on 
the foliage of Mimosa trees. 
Tessarecphora arachndides, Thomson. 
Tessarecphora arachndides, Thoms. Arch. Entom. i. p. 77> ph 9. f. 10 a, b. 
T. ovata, nigra, nitida; capite coriaceo, opaco; antennis articulis 
albis et albo hirsutis, 8°-l 1"^ fere nudis ; thorace et elytris lineolis 
reticulatis cinereis, his carinis centrobasalibus conico-elevatis et 
longe penicillatis, humeris falcatis 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. 
V 2 
