430 Mr. H. W. Bates on the Longicorn Coleoptera 
testaceis ; capite lato, fronte bicorni; antennis corpore duplo lon- 
gioribus, ‘longe ciliatis. Long. 5 lin. ¢. 
Forests of the Tapajos. 
11. Amphionycha testacea, n. sp. 
A. cylindrica, setosa, testacea, pube fulvescente sericea induta, tho- 
racis marginibus pallidioribus; elytris disco abdomineque basi 
fuscescentibus ; antennis tenuiter longe ciliatis, nigris, articulo 
basali (apice excepto) rufo, articulis quarto et quinto (apicibus 
exceptis) flavis; thorace antice angustato. Long. 33 lin. 
Head small, pale testaceous, crown darker; face convex, pro- 
minent ; upper and lower lobes of the eyes connected by a very 
slender thread. Antenne a little longer than the body, furnished 
with a scanty fringe of long straight hairs; basal joint red, 
except at the apex, which, together with the second and third 
joints, is deep black; third joint about one-third longer than 
the fourth, the latter (except the apex) and the basal half of the 
fifth pale yellow, the rest black. Thorax narrowed in front, and 
broadest in the middle; surface (except the disk) marked with 
large punctures, reddish testaceous, anterior and lateral borders 
paler. Elytra very briefly truncated at the apex; lateral carine 
vanishing considerably before the apex; surface punctured in 
lines, clothed with pale silky pubescence, brown testaceous, paler 
anteriorly. Body beneath and legs testaceous yellow, basal 
three-fourths of the abdomen blackish brown. 
ga. 
12. Amphionycha roseicollis, n. sp. 
A. brevior, linearis, nigra, subsericea; fronte, antenuis (apice ex- 
ceptis), corpore subtus, et pedibus flavo-testaceis ; abdomme apice 
nigro ; thorace (basi excepta) leete roseo, elytrorum lateribus et 
apicibus rufo-testaceis ; unguiculis simplicibus. Long. 33lin. ¢. 
Head as broad as the elytra; face yellow and densely pubes- 
cent ; vertex black, naked, coarsely punctured. Antenne one- 
third longer than the body, furnished with a scanty fringe of 
straight hairs, yellowish testaceous, sixth to eleventh joints 
dusky; basal joint subclavate; third joint about one-fourth 
longer than the fourth. Thorax with an obtuse prominence in 
the middle on each side, and narrowed behind; surface pale, 
and clothed with silky pink pubescence, hind ‘border black, 
coarsely punctured, lateral prominences pale. LElytra linear, 
sinuate-truncate at the apex, with both angles prominent ; lateral 
carina obsolete before reaching the apex, and accompanied in 
that part by a lower carima, parallel to it but not reaching the 
middle of the elytra; surface punctured, black, with changeable 
greyish pubescence ; lateral margins reddish; apex testaceous. 
