On Aquatic Carnivorous Coleoptera or Dytiscidw. 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 intermediis 

 piceis ; pedibus posterioribus tibiis tarsisque piceis, femoribus rufescentibus ; 

 antennis testaceis. Long. -2,7, lat. 14? 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. (Nortliern 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, femojibus 

 anterioribus fusco-maculatis, tibiis intermediis fusco-testaceis, tarsis pedibusque 

 posterioribus piceis : antennis testaceis. Long. 24, lat ISi m.m. 



The anterior tarsi of the male are small, 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 



TBANS. BOY. DUI3. SOC, N.S., VOL. II. -3 IS 



