390 On Aquatic Carnivorous Coleoptera or Dijtiscidu;. 



No ligula on inner face of elytrou ; terminal portion of epipleura narrow ; "] 



Immeral area of elj'tra not limited Ijeliind by a raised lino. Fifty i DERONECTES. 



species, princii)ally inliabiting the European and Mediten-anean region, [ (Vide vi. 418.) 



with a few in the nortliern half of America. J 



Mesosternal fork connected with the intercoxal process of metasternum ; "| 



(in all the preceding genera of Hydroporini this connection does not 1 IIYDROI'OECS 



exist.) One hundred and fifty species, nearly all peculiar to the j" (TiWep. 43.5.) 



European and North American regions. J 



I. 32.— Genus HYPHOPOIWS. 



Ligula on inner fixce 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. — Ovalls, crassus, brevis, convexus, ferrugineus ; 

 elytris vage nigro-signatis, punctis majoribus et minoribus dense munitis, majoribus 

 ad apicem disinentibus ; corpore subtus grosse punctate. Long. 4f, lat. 3 m.m. 



This species has quite the thick convex form of a Hyphydrus, but structurally 

 it is closely allied to Hydroporus soheri, (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 l.y Captain Boyd). 172. 



370. Hyphoporus aper, n. sp. p. — Ovalis, brevis, latus, convexus, ferrugineus, 

 sine pubescentia, opacus, prothorace basi elytrisque fusco-signatis, his fortiter 

 profundeque punctatis ; corpore snbtus fortiter punctate. Long. 3|, lat. 2| 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 T have seen are females. 



Northern India. 173. 



* The following two species .should also pretty certainly be referred to Hyphoponi.s. 

 Hydroporus interpulsus. Walk., (No. 1387); Ceylon.— Hyjihydrus rufus, Clk., (No. UG9), near No. 

 371 ; China. 



