195 
Xylomimus baculus, n. sp. 
.r. angustatus, cylindricus, thorace transversim crebre ruguloso ; 
elytris stria impressa sutiirali, apice singulatim obtuse rotundatis ; 
corpore supra brunneo, lateribus obscure ochraceo ; elytris pone 
medium fascia lata flexuosa bruimea ochraceo lineata ; antennis 
brunneis, articulo quarto flavo. Long. 5| lin. c5‘ ? 
Head dingy ochraceous, front uneven, punctured; vertex and 
occiput ample, brown, streaked with rusty ochreous ; antenni- 
ferous tubercles slightly prominent on their inner sides, and 
leaving a small semicircular notch between them. Antennae 
with the first and third joints dark brown varied with ochreous, 
bristly, fringe of the third also dark brown, fourth joint yellow, 
fifth, sixth, and seventh rusty brown. Thorax cylindrical, sur- 
face covered with numerous, irregular, transverse wrinkles ; 
lateral tubercles small, conical, dark brown in the middle, with 
three indistinct rusty-brown vittae ; sides each with an ochreous 
vitta, below which is a broader brown vitta. Elytra linear, 
shoulders not prominent, apex of each obtusely rounded; surface 
slightly uneven, plane towards the base and more convex beyond 
the middle, punctured (except near the apex) and marked with 
an impressed stria near the suture ; colour rusty ochreous, with 
a broad common brown vitta over the suture from the base to 
beyond the middle, and a broad irregular brown fascia (lineated 
with rusty brown) at the termination of the vitta, the space 
near the apex having an irregular ochreous spot followed by a 
similarly shaped brown spot. Body beneath light brown ; sides 
of prothorax and breast with an ochreous-white vitta; abdomen 
streaked with oehreous wdiite. Legs clothed with pale tawny- 
brown pile. 
Found on a slender dead branch of a tree in the forests of the 
Tapajos. 
Genus Ecthcea, Pascoe. 
Pascoe, Trans. Ent. Soc. n. s. iv. p. 244 (1858). 
Syn. Talasius, Buquet, Thoms, Arcana Naturae, p. 99 (1859). 
This remarkable genus is distinguished from the allied groups 
by many well-marked features, which have been well described 
by the authors above quoted. I myself met with female exam- 
ples only, and have not been able to examine the opposite sex, 
which bears one of the chief marks of the genus — namely, four 
horn-like projections from the forehead. The body is large and 
eylindrical ; the head very broad, and remarkable (besides the 
horned forehead of the male) for the great convexity of the crown, 
which rises very much higher than the base of the antennse, and 
descends perpendicularly from its front edge towards the tuber- 
cles which support those organs. The elytra are broad and 
