of the Amazon Valley. 
303 
3. Compsa quadri guttata. 
Ibidion quadriguttatum, White^ Cat. Longic. Brit. Mus. 
p. 226. 
Angustata^ linearis^ fulvo-testacea^ capite thoraceque 
griseo-tomentosis ; hoc cylindrico_, paulo inaequali, hand 
tuberculoso, laevi ; elytris sinuato-truncatis et bispinosis, 
nitidis^ laevibus,, punctulis setiferis vix conspicuis_, fulvis, 
macula obliqua liueari laterali prope basin^ alteraque simili 
prop© apicem nigris, testaceo-albo-marginatis. 
Long. 4 lin. $ . 
Hah. — Eiver Tapajos. 
Genus Heteeachthes. 
Newman^ Entom. i. 9. 
Compsa (part)j Lacord. Gen. viii. 333. 
Antennae and tibiae free from carinae ; the femora are 
clavate, and destitute of spines at the tip. Notwith- 
standing these differences of structure, the species offer 
no peculiarity of facies to distinguish them from Ihidion,, 
Gnomidolorij and other sub-divisions. 
1. Heterachthes decipiens, n. sp. 
Elongatus, nigro-piceus, nitidus, setosus, antennis fe- 
moribusque rufo-piceis ; thorace elongato, angusto, po- 
lito, laevi, dorso medio tuberculo magno conico ; elytris 
bispinosis, spina suturali minori, supra (punctulis setiferis 
exceptis) lasvibus, macula laterali ante medium fasciaque 
obliqua paulo post medium testaceo-flavis. 
Long. lin. $ . 
This species has a very close resemblance to Gnomidolon 
melanosomum {ante, p. 288) and the allied species, but 
differs in the antennal joints being entirely free from 
carinae in both sexes; the third joint is perfectly cylin- 
drical. In the A ) the third to the sixth joints are a little 
stouter than in the $ ; in the femora, the club is dis- 
tinct, but not abruptly formed, and the slight projections 
at the apex are not sufficiently advanced or pointed to 
be termed spines or teeth. 
Hah. — Ega. 
