Mr. C. O. Waterhouse on new Madagascar Coleoptera. 45 
Diastotropis nitidipennis, n. sp. 
Elongatus, sat angustus, nigro-violaceus ; capite thoraceque opacis, 
confertim punctulatis ; elytris eeneis, nitidissimis, subtiliter striato- 
punctulatis, sutura postice nigro-velutina. 
Long. 73 lines. 
This species has the form of D. planifrons, but is at once 
distinguished by its highly polished brassy elytra. The ros- 
trum is very similar, but has a distinct shallow median im- 
pression. ‘T’he thorax is evenly convex, densely and extremely 
finely punctured, very gently arcuate at the sides. The elytra 
have a slight impression at the base within the shoulder, the 
suture is also impressed below the scutellum. Besides the 
lines of fine rather distant punctures, some extremely minute 
ones may be traced here and there on the interstices. The 
antenne (with the exception of the club) are pitchy, slender, 
in the male a trifle longer than the length of the thorax, in 
the female scarcely shorter. The legs are pitchy bronze, 
shining. ‘The male has a well-marked round impression on 
the division between the first and second segments of the 
abdomen, and a slight one on the margin of the second and 
third segments. 
This and the preceding species might perhaps be separated 
as a distinct genus from Dzastotropis, on account of the non- 
carinate rostrum, more cylindrical thorax, &c. ; but I prefer at 
present including them. 
Cerambycide. 
Logisticus modestus, n. sp. 
Brunneus, subtiliter griseo-sericeus, capite thoraceque nigrescentibus. 
Long. 6-73 lin. 
General colour very light brown, the underside of the insect 
more pitchy. Head brownish black, rather broad; muzzle 
rather short, the space between the front of the eye and the 
base of the mandible (viewed laterally) about half the dia- 
meter of the eye. Eyes large and prominent, moderately 
widely separated above; where they are most approximate, 
they are distant about ? millim. in the smaller examples, and 
nearly 1 millim. apart in the larger. Thorax obliquely nar- 
rowed in front of the lateral tubercle, subparallel behind; the 
lateral tubercle angularly prominent; on the disk are four 
slight small round swellings, two a little in front of the 
middle and two near the base. LHlytra very straight at the 
base, with scarcely any impression within the shoulders, 
