On Aquatic Carmvorous Coleoptera or Dytiscide, 377 
inis segmento apicali transversim impresso, apice medio incrassato ; tibiis anterior- 
ibus dilatatis. 
Senegal ; Cape Verde Islands. 31. 
339. Hyphydrus stipes, n. sp.—Ovalis, sat convexus et latus, crebre sat fortiter, 
minus inzqualiter punctatus, piceus, capite, thoracis lateribus angustius elytrisque 
rufo-testaceis, his nigro-signatis, stria discoidali ad basin distincta ; tarsorum anti- 
‘corum articulo 3° nigricante. 
Mas, trochanteribus anterioribus incisis, incisuree margine externo crasso ; 
abdominis segmento apicali profunde transversim impresso, apice medio late incrassato, 
tibiis anterioribus leviter dilatatis. Long. 43, lat. vix 3 m.m. 
Fem., minor, paulo magis subtiliter punctata. 
Closely allied to Hyphydrus crassus, but scarcely so broad, with the sculpture of 
the upper surface not quite so dense, the finer punctures being not so large, and 
with the male tibize a good deal narrower. The greater development of the finer 
punctures of the upper surface readily distinguishes it from Hyphydrus pictus, (No. 
336). 
Madagascar, Bourbon. 32. 
340. Hyphydrusscriptus, Aubé, M.C.—Ovalis, convexus, latus, nitidus, inzequaliter 
sat crebre punctatus, picescens, capite, thoracis lateribus angustius, elytrisque rufo- . 
testaceis, his nigro-signatis, stria discoidali ad basin distincta. 
Mas, trochanteribus anterioribus fere ad basin incisis, tarsorum quatuor anti- 
corum articulo basali posterius fortiter dilatato; tibiis anterioribus bene dilatatis ; 
abdominis segmento apicali transversim impresso, apice medio incrassato. Long. 
44, lat. 3 m.m. 
Fem., paulo minor et subtilius punctata. 
A species of short, broad and convex form, with the fine punctures of the elytra 
distinct but small and not dense, so that they are quite distinct from the larger 
punctures although these are not coarse or conspicuous. 
I have seen only a pair of this species, the female was one of two specimens in 
Déjean’s collection labelled “ Hyphydrus scriptus? h. in Ins. Bourbon,” the other 
individual being a female of H. stipes. The female of this species has the front 
tarsi yellow, while the third joint is infuscate in the male. 
I cannot satisfactorily assign the description given by Fabricius (Ent. syst. supp. 
p. 65) to this or any other species, but it no doubt refers to some species of 
Hyphydrus (Vide Syst. El. I. p. 257 where it is associated with Dytiscus ovatus, 
under the generic name Hydrachna). Although it is not probable that Aubé was 
correct in thinking the present species was the one intended by Fabricius, I have 
