84 HYDKOPHILID^. 



HYDROCHUS, Leach. 



H. nitidicollis, Mvals., Palpic, 1844, 49. Ganglbauer, Kafer. von. 

 Mitteleuiopa, iv. 179: "In general shape like H. carinatus, Germ., 

 from which it may be known by the not, or only slightly, raised 

 third interstices of the elytra, and the less deep and more closely set 

 punctures of the elytral strise ; the colour is variable, being black or 

 bronze, or with the pronotum metallic blue-green or green, and the 

 elytra violaceous or with a purple reflection ; antennae rust-red with the 

 club dark ; palpi yellow with a black tip to the last joint, or quite dark ; 

 legs yellow-red or brown-red, with the knees and the tips of the tarsal 

 claws, or the whole femora and tarsi black. Head and thoi-ax less 

 deeply and closely punctvired than in H. carinatus. Thorax about as 

 broad as the head and about as long as broad, narrowed behind, with 

 rather deep impressions. Elytra much less elongate than in H. angtistatus, 

 but with similar coarsely punctured strife, with the third interstice not 

 or scarcely, and the fifth, seventh and ninth interstices plainly raised 

 in blunt keels, the keel of the seventh usually interrupted by an 

 impression." L. 2^-2J mm. 



In running water. River Meavy, Yelverton, Devon (Donisthorpe 

 and Keys). Introduced by Mr. Donisthorpe (Ent. Record, 1906, 

 p. 133). Subsequently taken by Mr. de la Garde in other parts of 

 Devonshire. Our other four species are usually found in stagnant 

 pools or ponds. The species also occurs in Central and Southern 

 France. 



OCHTHEBIUS, Leach. 



O. lejolisi, Muls. et Rey., Mem. 8oc. Cherbourg., viii. 1861, 

 p. 431, Elongate, dull bronze or black-bronze; head rather long, 

 somewhat shiny in front, with two deep impressions at base, eyes 

 prominent, penultimate joint of the maxillary palpi strongly inflated : 

 pronotum almost as long as broad, closely punctured, with the sides 

 moderately rounded, with a shallow ti'ansverse impression in front, a 

 centi'al furrow and an oblique furrow on each side meeting at the base 

 of this, and forming a rough figure of the government broad arrow in 

 well marked specimens ; the character, however, is somewhat variable ; 

 elytra long and narrow, not strongly rounded at the sides, distinctly 

 punctate-striate, with the lateral margins serrate ; legs dull red or 

 ferruginous. L. 1| mm. 



Ilfracombe, Devon : taken by Mr. W. H. Bennett in June 1895, 

 and introduced by him as British (Ent. Mo. Mag.xxxi. (2 Ser. vi.) 181); 

 Bedel (Faun. Col. du Bassin de la Seine, i. p. 317) says that it is found 

 in France " in small pools of salt water on rocks on the coast, rare." It 

 has been recorded from Cherbourg, the coast of Provence, and doubt- 

 fully from Algeria. Mr. Bennett found it in some numbers in small 

 pools of very stale and putrid sea- water just above high-water mark at 

 the base of the cliffs, but not beyond the reach of the spring tides. 

 They were confined to a very limited area. 



