390 On Aquatic Carnivorous Coleoptera or Dytiscide. 
No ligula on inner face of elytron ; terminal portion of epipleura narrow ; ] 
humeral area of elytra not limited behind by a raised line. Fifty | DERONECTES. 
species, principally inhabiting the European and Mediterranean region, f (Vide p. 418.) 
with a few in the northern half of America. J 
Mesosternal fork connected with the intercoxal process of metasternum ; } 
(in all the preceding genera of Hydroporini this connection does not | HYDROPORUS 
exist.) One hundred and fifty species, nearly all peculiar to the f (Vide p. 435.) 
European and North American regions. 
I. 32.—Genus HY PHOPORUS. 
Ligula on inner face of elytron abrupt and prominent. Terminal joint of front 
tarsus very short in comparison with the third joint. Mesosternal fork not con- 
nected with intercoxal process of metasternum. 
The three species * have much the appearance of the Hyphydri, to which genus 
they are allied by the tarsal structure. They are all Asiatic, but one extends to 
Egypt. 
369. Hyphoporus elevatus, n. sp.—Ovalis, crassus, brevis, convexts, ferrugineus ; 
elytris vage nigro-signatis, punctis majoribus et minoribus dense munitis, majoribus 
ad apicem disinentibus ; corpore subtus grosse punctato. Long. 4%, lat. 3 m.m. 
This species has quite the thick convex form of a Hyphydrus, but structurally 
it is closely allied to Hydroporus solieri, (No. 371). The only individual I have 
seen is, I believe, a male, the front and middle tarsi are short and broad, the three 
basal joints being of about one width ; the apical joint is very short. 
Northern India, (found by Captain Boyd). 172. 
270. Hyphoporus aper, n. sp. 9.—Ovalis, brevis, latus, convexus, ferrugineus, 
sine pubescentia, opacus, prothorace basi elytrisque fusco-signatis, his fortiter 
profundeque punctatis ; corpore subtus fortiter punctato. Long. 38, lat. 22 m.m. 
This species has much the appearance of a rotund Hyphydrus, it is similar to 
Hydroporus solieri, but is readily distinguished by its much shorter form, and the 
coarser punctuation of the elytra. The only individuals I have seen are females. 
Northern India. 173. 
* The following two species should also pretty certainly be referred to Hyphoporus. 
Hydroporus interpulsus, Walk., (No. 1387); Ceylon—-Hyphydrus rufus, Clk., (No. 1469), near No. 
371 ; China. 
