204 THE ENTOMOLOGIST. 



slender, the lower three joints fulvous, the rest black, the second and 

 thml joints equal, each sliorter than the fourth ; thorax transverse, 

 the sides rounded, the anterior angles pointed, the basal margin pre- 

 ceded by a narrow but deep partly punctured groove, the surface im- 

 punctate, very minutely granulate, with a rather large black spot at 

 each side ; scutellum piceous ; elytra subcylindrical, strongly punctate- 

 striate, the punctures much finer towards the apex, the interstices here 

 and there finely wrinkled, the suture narrowly and the sides more 

 broadly black, this colour at the latter place abbreviated near the 

 apex ; below and the legs fulvous, the posterior femora with a small 

 tooth. 



This species — the only one known at present from Mauritius 

 — resembles much in coloration many Australian forms of the 

 genus, but may be separated by the impunctate and maculate 

 thorax, and the markings of the elytra ; the latter are somewhat 

 variable, and probably sometimes either entirely absent or more 

 strongly marked. The structural characters are entirely those 

 of the genus Rhyparida. 



Trichostola puncticollis, sp. n. 



Black below, above greenish cupreous, clothed with white pubes- 

 cence ; the basal jomts of the antennae and the legs fulvous ; thorax 

 very strongly punctured ; elytra very closely and equally strongly 

 punctate. Length, 2 mill. 



Head metallic greenish, strongly but sparingly punctured, clothed 

 with single long white hairs ; labrum fulvous ; antennse extending 

 nearly to the end of the elytra, black, the lower three or four joints 

 fulvous, third and fourth joints rather slender, equal, the following 

 joints slightly thickened ; thorax about twice as broad as long, the 

 lateral margins rounded, the surface very closely and deeply punctured, 

 cupreous, sparingly pubescent ; elytra with a feeble transverse de- 

 pression below the base, punctured like the thorax, the punctuation 

 arranged in very close rows, the interstices scarcely defined, with a 

 few fine punctures, partly transversely wrinkled and clothed with 

 white hairs ; below black, legs fulvous. 



I know of no other species of this genus having an equally 

 strongly punctured thorax. T. rugulosa, Fairm., is described 

 with a pale fulvous pubescence, and with a finely rugose thorax 

 and elytra ; the antennae are also described as fulvous. 



Trichostola thoracica, sp. n. 



Below black ; antennae and legs fulvous, above obscure cupreous ; 

 thorax transverse, finely rugosely punctured, clothed with grey pubes- 

 cence ; elytra finely punctate-stnate, the interstices finely wrinkled 

 and pubescent. Length, 3 mill. 



Head finely rugose and pubescent, dark cupreous, opaque ; antennse 

 fulvous, the last joint darker, third joint distinctly shorter than the 

 fourth ; thorax more than twice as broad as long, of equal width, the 

 sides scarcely deflexed, the lateral margins rounded, the surface sculp- 

 tured like the head, and clothed with grey pubescence ; elytra with a 



