SCOTT—COLEOPTERA ; HYDROPHILIDA, HISTERID A 213 
statement of the difference between the two species (Ann. Soc. ent. France, xxii. 1903, 
p. 45). Otherwise I have failed to detect any appreciable difference in either upper- or 
under-sides. In both the punctuation above is rather fine, very close, and nearly even on 
head, thorax and elytra; the posterior femora are very finely and sparsely punctate, while 
the intermediate femora have numerous moderately strong punctures ; and the palpi are of 
the same reddish-yellow colour in both. The Aldabra specimens are mostly 5 mm. long, 
or with head extended 6 mm. : a few are smaller”. 
A single specimen from the Seychelles (Mahé ; low country, 1908) is a little shorter 
and perceptibly broader in proportion than the Aldabra specimens, and a trifle more 
strongly punctured, especially on the elytra. I am uncertain to which species this should 
be referred [see footnote ; C. punctulatum Klug has been recorded from the Seychelles ; 
see below |. 
Loc. Aldabra: Takamaka, X.—XI. 1908 (Fryer) ; Picard Island, 1907. Madagascar ; 
East and South Africa. 
16. Celostoma punctulatum (Klug). 
Spheridium punctulatum Klug, Ins. Madag., 1833, p. 161 (73). 
Celostoma punctulatum Alluaud, Liste Coléopt., p. 232; Régimbart, Ann. Soe. ent. 
France, lxxu. 1903, p. 45; Kolbe, Mitt. Zool. Mus. Berlin, v. 1910, p. 24. 
Cyclonotum punctulatum Régimbart, Ann. Soc. ent. France, Ixxv. 1906, p. 269. 
This species is recorded from the Seychelles by Kolbe (/.c.). I only obtained one 
specimen of the genus Celostoma in the Seychelles, and am uncertain to which species it 
should be referred : it is mentioned above, under C. rufitarse. 
Loc. Seychelles: Mahé (Brauer). Madagascar; East Africa, West Africa (Gabon, 
&e., teste Régimbart, /.c.). 
BouRDONNAISIA, gen. nov. (Plate 14, figs. 12—21). 
Corpus ovale, haud fortiter convexum, supra nitidissimum et glabrum. Oculi antice 
haud emarginati. Antennee in ? 9-, in ¢ 8- vel 9-articulatze, articulis tribus ultimis 
* Tt is impossible not to feel some doubt as to the identity of these specimens. The types of rufitarse and 
punctulatum have not been accessible, and it is not absolutely certain that the specimens used for comparison 
really belong to those species, though they probably do so. Moreover, beyond the difference in size and general 
form, there do not appear to be real differentiating characters between the two species. I hoped the form of 
the scutellum might possibly prove a differentiating character, since in a specimen from Brit. Hast Africa 
(ex coll. Régimbart, Paris Mus.) the scutellum is much narrower at the base, proportionately longer and 
consequently more acute at the apex [this specimen is labelled “punctwlatum Klug ?,” but its identity with that 
species is very doubtful, owing to the relatively narrow form of the insect as a whole and of its scutellum; 
Régimbart admitted the possibility of the presence of a third species among some rufitarse from Hast Africa, 
see Ann. Soe. ent. France, Ixxv. 1906, p. 269]: but Régimbart’s specimen of rufitarse, the Aldabra specimens, 
and one at least of the specimens of punctwlatum, all agree in having the scutellum broad at the base and 
relatively short. Neither does the form of the head appear to differentiate the two, though in specimens before 
me of a third species (C'. simplex Sharp, Ceylon) its relative narrowness is at once apparent. The characters 
Separating species of this genus seem in several cases very unsatisfactory, and probably a thorough revision, 
with examination of genitalia, &c., is needed. 
SECOND SERIES—ZOOLOGY, VOL. XVI. 28 
