On Aquatic Carnivorous Coleoptera or Di/tiscid(e. 790 



elytris sat crebre, mediocriter pmictatis, basi, sutura lineisque quatuor, 1 et 3 antice posticeque paullo, 2 

 antice valde, 4 brevi utrinque magis abbreviatis, lineolaque postica lateral!, subobliqua, nigris. Long. 

 5, lat. 3 m.m." 



[This diaffnosis is followed, I.e., bij a long descriptio7i.] 



I can form no clear opinion as to the species, it may possibly be a Herophydrus or CceJambus. — 

 D. S. 



1387. Hydroporus interpulsns, Walk., Ann. Nat. Hist., 3rd ser., IT, 18.58, p. 304. Ceylon. 



" Niger, crassus, capite, thoracis fascia latissima et elytrorum margine teniii luteo-ferrugineis. Long. 

 If lin." 



According to the type in the British Museum this is allied to No. 370, Hyphoporus aper. — D. S. 



1388. Hydroporus kingii, Clk., Ann. Nat. Hist., 1862, p. 178. Mexico. 



" Ovatus, subdepressus, puuctulatus ; tliorace nigro, marginibus flavis ; elytris rufo-fuscis ; pedibas 

 antennisque rufo-testaceis. Long. corp. 1 J lin., lat. f lin." 



"Ovate, broad, subdepressed ; when seen under a high power, finely and sparingly punctate ; glabrous, 

 darkly castaneous : head broadly transverse, impunctate, black : thorax broadly transverse, the sides 

 rounded in form, the marginal line being continuous with that of the sides of the elytra and also of the 

 head ; the anterior margin is straight, the anterior angles being subprominent ; parallel to the anterior 

 margin is a row of minute punctures ; the surface generally is impunctate aud glabrous, with faint 

 traces near the base of obsolete punctures ; in colour black, the sides being suffused more or less broadly 

 with flavous ; elytra sufficiently robust, towards the apex subacuminated (but not so distinctly as in 

 H. wardii) ; the surface is finely and somewhat sparingly punctate throughout, with a single medi-\l 

 stria of closely arranged minute punctures on each elytron : abdomen and underside black : legs and 

 antennas rufo-testaceous." 



This is allied to HydroiJorus vilis, Lee. (No. 641). — T>. S. 



1389. Hydroporus laccophilinus, Lee., Proc. Am. Phil. Soe. 1878, p. 595. North America. 



" Ovate, depressed, pointed behind, brown, paler in front, darker behind ; epistoma not margined, 

 head finely punctulate ; prothorax (i¥a*) rugose and finely punctured, narrower in front, sides oblique, 

 finely margined. Elytra (J/as) strongly punctured, shining (Fem.) opaque, finely sparsely punctulate. 

 nietasternum channeled for the posterior half of its length ; sparsely puuctui-ed in front ; abdomen 

 coarsely punctured in both sexes. Length 2-6 m. m. ; '10 inch. 



" Detroit ; rare. The form is exactly that of a Laccophilus in miniature. The head and prothorax 

 ■of the/em. are opaque and very finely and sparsely punctulate." 



1390. Hydroporus lanceolatus. Walk., List. Col. Lord. p. 10. Wady Ferran. 



" Black, elongate, elliptical, slightly shining. Head, palpi, antennie and legs tawny. Prothorax in 

 front with a broad tawny band, which is much excavated on each side of its hind border. Pectus with 

 a tawny spot on each side. Elytra smooth, each with a large testaceous basal patch whicli emits two 

 lanceolate streaks, with two testaceous dots near the suture, and with a large posterior elongated 

 testaceous patch which extends to the tip and includes a black dot. Length of the body 2| lines." 



This is probably to be assigned to Deronectes. — D. S. 



1391. Hydroporus latebrosus, Leo., Ann. Lye. V. p. 208. California. 



" Ovalis, convexiusculus, postice magis attenuatus, minus dense punctatus, piceus nitidus, thorace 



