S8 PHILHYDRIDA. HVDROPHILIDiE. 



Fam. 14. HYDROPHILIDiE Leach. 



cxviii. Limnebius Ant. 8-jointed, the 6 terminal joints forming a club : max. 

 palpi much longer than the antennae: eyes not prominent: body slightly 

 depressed : elytra truncate at the apex : sternum simple : tibiae and hinder 

 tarsi not ciliated. 



cxix. Hydrophilus Ant. 9-jointed, 2d joint conic, 4 terminal joints forming a 

 club, of which the last joint is acuminated : labrum entire : mand. toothed 

 within : sternum much elevated, acute behind : elytra narrowed behind : 

 4 hinder tarsi greatly compressed and ciliated : claws bifid : $ with last 

 joint of anter. tarsi dilated. 



cxx. Hydr^chus Ant. 9-jointed, 2d joint conic, 3 terminal joints forming a 

 club, of which the last joint is obtuse : labrum notched ; mand. bifid 

 at the apex and ciliated within : sternum terminating in an acute spine, 

 not extending beyond the insertion of the hinder legs : elytra wide behind : 

 4 hinder tarsi compressed and ciliated : S with anter. tarsi single. 



cxxi. Spercheus Ant. 6-jointed, the 5 terminal joints forming a cylindrical 

 club : clypeus notched ; labrum transverse 4-drate : maxillae with outer lobe 

 very long, slender, setose at tip : body wide, very convex : sternum simple : 

 tibiae angulated, smooth ; tarsi with 4 basal joints short, apical one very long. 



cxxii. Berosus Ant. 8-jointed, the 3 terminal joints forming an obtuse club : 

 labrum entire : eyes very prominent : tho. convex : elytra globose, much 

 wider than the thorax, striated : sternum simple : jjost. tibiae and tarsi ciliated, 

 the latter compressed. 



cxxiii. Hydrobius Ant. 9-jointed, 2d joint conic ; the 4 terminal joints 

 forming a club, with its tip acute : max. palpi with terminal joint longer 

 than the preceding : labrum faintly notched : eyes sessile : tho. as wide at 

 the base as the elytra; the latter obtuse, striated ; sternum simple, carinated : 



h du «H«rh*l" ^1-,^-*... v -m. --"-• «*»"~*j cvrapreooca, cuiitteu. 



cxxiv. Philhydrus Ant. 9-jointed, 2d joint somewhat conic, the 4 terminal 

 joints forming a rather acute club : labrum entire : max. palpi much longer 

 than the antenna?, with the terminal joint shorter than the preceding : body 

 oblong, convex : tho. as wide as the elytra, which are not striated : scutel- 

 lum small : post, tarsi ciliated. 



cxxv. Laccobius Ant. 8-jointed, 2d joint conic, the 3 last forming an acute 

 club : max. palpi with the 2 terminal joints a little elongate, and nearly 

 equal : body somewhat globose : elytra rather glabrous, their sides nearly 

 in continuity with those of the thorax ; punctate : post, tibiae not ciliated ; 

 tarsi slender, ciliated. 



cxxvi. ChuEtarthria Ant. 9-jointed, 2d joint globose ; with a rigid bristle 

 on one side, 2 next minute, setose, the 3 terminal ones forming an elongate 

 ovate, pilose club, with the penultimate joint large : palpi short ; the ter- 

 minal joint large, obtusely conic, preceding joint small : body very gibbous ; 

 sternum simple : post, tarsi ciliated. 



118 Limnebius Leach. 



6*82 ater Ste. M. ii. 119. pi. xiv. f. 4. — Ovate-obtuse: deep glossy black, 



with the lateral margins of the thorax and of the elytra paler, or reddish ; 



thighs pitchy, tibiae and tarsi paler : immature specimens are chestnut above. 



(L. 1-1^1.) London district ; Swansea; Devon; Halifax; Dorset; &c. : 



0. 

 683 affinis Ste. M. ii. 120. — Oblong-ovate, slightly narrowed behind ; glossy 



black, with the margins of the thorax and of the elytra concolorous ; the 



apex of the latter rounded ; thighs black ; tibiae and tarsi reddish. (L. 



1|-1|1.) Near London : 4-6. 



