On Aquatic Carnivorous Coleoptera or Dytiscida. 731 
sculpture, whereas the present species has in that sex, a perfectly distinct although 
very fine sexual sculpture of excessively short scratches near the base of the wing- 
cases; the form too, is always shorter than in the African individuals which most 
resemble it; the male front and middle tarsi seem quite the same as in the African 
specimens. 
Madagascar. 1072. 
1142. Cybister asiaticus, n. sp.—Ovalis, supra olivaceo-niger, capite anterius 
prothoracisque lateribus testaceis, elytris margine externo (cum epipleuris) argute et 
sat late testaceo ; subtus variegatus, pectore testaceo, in medio ferrugineo vel piceo, 
ad latera anguste nigricante, prosterno abdomineque picescentibus ; pedibus quatuor 
anterioribus testaceis, femoribus anterioribus fusco-maculatis, tarsis intermedius 
piceis; pedibus posterioribus tibiis tarsisque piceis, femoribus rufescentibus ; 
antennis testaceis. Long. 27, lat. 143 m.m. 
The anterior tarsi of the male are rather small, and similar to those of Dytiscus 
tripunctatus; the two basal joints of the intermediate tarsi bear rather narrow patches 
of moderately short sexual pubescence, that on the second joint being a good deal 
narrower than that of the basal one: there is sometimes an extension of this 
pubescence on to the third joint. The female never has any trace of sexual sculpture. 
This species is closely allied to Dytiscus tripunctatus, but is readily distinguished 
by the colour of the undersurface; the whole of the epistome is yellow, the lateral 
band of the elytra is very similar to that of D. tripunctatus, that is to say it is 
sharply defined even to the apex of the elytra, near which it shows a hook-like 
dilatation, beyond this becoming narrower till it touches the suture as a point. 
The species varies much in size, and as a rule the largest individuals show the 
greatest extension of dark colour on the undersurface. 
India, Persia, Mesopotamia. (Northern India, Calcutta, Central India; Northern Persia, 1862-3, 
Doria ; Mesopotamia Dr. Millingen). 1073. 
1143. Cybister fumatus, n. sp.—Ovalis, parum elongatus, convexus, supra 
olivaceo-niger, capite anterius prothoracisque lateribus testaceis, elytris margine 
externo (cum epipleuris) sat late testaceo; corpore subtus piceo, pectore prope 
latera plaga vaga ferruginea; pedibus quatuor anterioribus testaceis, femoribus 
anterioribus fusco-maculatis, tibiis intermediis fusco-testaceis, tarsis pedibusque 
posterioribus piceis: antennis testaceis. Long. 24, lat 132 m.m. 
The anterior tarsi of the male are smali, and nearly similar to those of Dytiscus 
tripunctatus ; the intermediate feet have rather narrow patches of sexual pubes- 
cence on the three basal joints, that on the third joint being quite narrow, that on 
the second intermediate in width between the other two. The female has on the 
TRANS. ROY. DUB. SOC., N.S., VOL. II. 5B 
