Mr. H. W. Bates on the Longicorns of the Amazons. 367 
of the epidermis and cortical substance, produced either by too 
great dryness or, especially, by too much moisture. 
A closer investigation of feathers would perhaps explain the 
geographical distribution of colours modified by climatic influ- 
ences, the formation of local varieties, or the parallel effects, often 
so curious, of captivity upon coloration. 
XLIL.— Contributions to an Insect Fauna of the Amazons Valley. 
Cotvortera: Loneicornes. By H. W. Barus, Esq. 
[Continued from p. 303.] 
Group Astatheine. 
Genus Puasa, Newman. 
Newman, Entomologist, p. 13. 
Syn. Lamprocleptes, Thomson, Arch. Entom. i. 377. 
The chief character which distinguishes this genus from 
Tetraopes (the chief American representative of the group Asta- 
theinz) is the form of the tooth of the claws. ‘The tooth in 
Tetravpes is long and acute, running parallel to the claw itself, 
but much shorter; in Phea it is very broad and short, adhering 
only to the base of the claw, as in the Calliane. The eyes, as 
in the rest of the Astatheinz, are completely divided. The body 
is more or less elongate and linear. 
Phea coccinea, n. sp. 
P. linearis, brevis, coccinea, pube pallida sericea vestita; femoribus 
apice, tibiis, tarsis et antennis (basi exceptis) nigris. Long. 32 lin. 
Head as broad as the middle part of the thorax, bright red ; 
eyes moderately prominent, black. Antenne about as long as 
the body, filiform, hirsute, black, basal half of the first jot red. 
Thorax constricted near the front and hind margins, surface 
strongly elevated and smooth in the middle, clothed with long 
erect hairs; bright red. Elytra linear, bright red, clothed with 
fine pale silky pubescence (visible only in certain lights), and 
with erect hairs, strongly punctate-striate, the punctures fainter 
and more confused towards the apex. Body beneath and thighs 
yellowish red; apex of thighs, tibize, and tarsi black. 
Santarem. 
Group Amphionychine. 
[The Amphionychine are distinguished from the Phytceciinse 
(both having bifid claws) by the sides of the elytra having a 
longitudinal carina extending from the shoulders. | 
