276 Mr. C. O. Waterhouse on 
Although I have referred this species to Scotosta, this action 
is but tentative; like nearly all the large genera of moths, 
Scotosia will have to be subdivided, and the form of the wings 
(especially of the primaries *) in the male of this species will 
then probably entitle it to rank as a distinct genus. 
XXXII. — Coleoptera collected during the EHapedition of 
H.M.S. ‘ Challenger.’ By CHARLES O. WATERHOUSE. 
THE present paper has reference only to the Coleoptera col- 
lected at Tristan d’Acunha, Ki Dulan, Aru Islands, and 
Tahiti. 
TRISTAN D’ACUNHA. 
Carmichael, in his “ Description of Tristan da Cunha” 
(Tr. Linn. Soe. xii. pp. 497-8), says, “‘ The only insects I ob- 
served are three small species of Curculio, four Phalena, one 
Hippobosca, two of Musca, one of Tipula.” 
Probably the Curculionide referred to may be those de- 
scribed below as Palechthus and Pentarthrum. 
Lancetes varius, Faby. 
Hab. Inaccessible Island. 
The eight specimens received are a trifle longer and nar- 
rower than the Chilian specimens; they have the anterior 
margin of the thorax pitchy, and the fuscous spot at the base 
extends beyond the middle of the thorax. The sterna and 
posterior coxe are pale. All the Chilian specimens in the 
Museum collection have the sterna and coxe blackish, and 
the fuscous marks on the thorax, when present at all, are 
very small. The Fabrician type from Patagonia has the 
thorax entirely yellow as well as the sterna and _ posterior 
coxe.  Babington’s types, described as Colymbetes nigro- 
rematus, from Port Famine and Port Desire, have scarcely 
any trace of the spots on the thorax, but have the sterna and 
coxee black. Mr. Sharpe, in his monograph of the Dytiscide 
(Sci. Tr. R. Dublin Soc. 1. 1880-2, p. 604), under Lancetes 
premorsus (the name he adopts for the species) gives Bolivia 
and Monte Video as additional localities, 
Cercyon littorale, Gyll. 
Hab. Ynaccessible Island. 
Two examples agreeing with Kuropean specimens. 
* The male primaries are formed as in the genus Chesvas, 
