COLEOPTERA. PARNIDZ — HYDROPHILID. 9 
Subfamily 2. Elmides Westw. (Limniide Steph.). 
ELMIS Latreille. Limntus Iiliger. 11 sp. Elm. Maugetii Latr. Curt. 294. 
Antenne 11-jointed, as long as the thorax, slightly thickened at the tip ; body 
ovate. 
STENELMIS Dufour. Limnivs p. Steph. 1 sp. Elm. parallelipipedus Mliger. 
Antenne slender ; body narrow ; last ventral segment subemarginate. Dufour, 
Ann. Sci. Nat. 
GEORYSSUS Latr. Caruammistes JIlig. vol. vi. 1 sp.  Pimelia pygmea F. 
Subglobose ; antenne 9-jointed, very short; club large, 3-jointed. Steph. Ill, 
g. pl. 13. 
Family 3.5 HELOPHORIDZ Mach, (Helophoridea Leach.) 
HELOPHORUS Leach, Etoruorus Fabr. 9 sp.  Silph. aquatica Linn. 
Thorax transverse; fore legs moderate ; last joint of max. palpi ovate; antenne 
9-jointed ; last joint short ; eyes sessile. Curt. 466. 
HYDROCHUS Germar. ‘Etornorus p. Fabr. 3 sp. El. elongatus Fabr. 
Thorax quadrate ; fore legs long ; eyes very prominent ; body narrow; last joint 
of max. palpi robust; last joint of antenne long. Curt. 359. 
ENICOCERUS Steph. Hyprana? Ahr. 3sp. En. viridieneus St. 
Max. palpi much shorter than the head, with the 5 terminal joints large; labrum 
large, notched ; elytra broad, oval, Curt. 291. 
OCHTHEBIUS Leach. Hyprana p. Latr. 12 sp. El. pygmeus Fabr. 
Max. palpi not longer than the head, with the last joint short, slender, and 
pointed ; legs short ; thorax entire. Curt. 250. 
AMPHIBOLUS Waterh. —————— 1 sp. A. atricapillus Waterh. 
Max. palpi shorter than the thorax ; terminal joint short ; elytra larger than the 
abdomen. 
HYDRANA Kzugell. Etorvorus p. Gyll. 13 sp. H. riparia Kug. 
Max. palpi longer than the head and thorax ; last joint long, fusiform; labrum 
notched. Curt. 307. 
SPERCHEUS Fabr. Hyproruiwus p. Marsh. 1 sp. Sp. emarginatus Fab. 
Body broad and very convex ; antenne 6-jointed, ovate; max. lobe very long 
and slender ; tarsi 5-jointed, the last joint very long. Curt. 394. 
Family 4. HYDROPHILIDZ MacLeay. 
LIMNEBIUS Leach. Uyproruitus p. Fab. 9 sp. Hydr. truncatellus F. 
Subdepressed ; apex of elytra truncate; eyes not prominent; sternum simple ; 
max. palpi much longer than the antenne. Steph. Ill. 2. pl. 14. f. 4. 
HYDROPHILUS Geoffr.* Hyprous Linn. MSS. Leach. 1 sp. Dyt. piceus L. 
Sternum very elevated and pointed ; labrum entire ; elytra narrowed behind ; last 
joint of anterior male tarsi dilated ; mandibles very much toothed. Curt. 239. 
Hynproruitus Leach. 
HYDROCHARIS Latr. } 1 sp. Hydr. caraboides Linn. 
Hyprous Brullé. 
Metasternum keeled, not extending beyond the posterior trochanters; labrum 
emarginate ; mandibles bifid at the apex, ciliated internally; ¢ tarsi simple. 
Curt. 159. 

* Geoffroy’s typical species of this genus was the Dyt. piceus Linn., which ought 
surely to have been retained as the type, instead of assigning it to a MS. genus of 
Linnzus, and giving another species as the type of Geoffroy’s genus. I have, there- 
fore, followed Latreille in giving a new generic name of the Caraboides rather 
than adopt Brullé’s plan of reversing Leach’s application of these names. 
