COLEOPTERA. 
219 
Hydroporides. 
Fairtmaire (Ann. Soc. Ent. Fr. 4® s6r. ix. p. 186) records llyphydrus 
distinctus (Aiib«5) from Madagascar, and briefly redescribes several other of 
the Dytiscidce already attributed to that island. 
Eischof-Ehinger (Mittheil. der schweiz. entom. Gesellsch. iii. p. G) 
notes the occurrence of Hydroporus ohsoletus (Aub6) at BMe. (Sharp records 
this species from Britain : Ent. Mo. Mag. vi. p. 81.) 
Bugnon (ibid.) records Hydroporus samnarM (Sahl.) from Lausanne. 
Wollaston (Ent. Mo. Mag. vi. p. 67) records Hydroporus minutissimus 
(Germ.) as British. 
Sharp (I. c.) notes the eccentric distribution of certain Hydropori(p. 82), 
and elucidates the synonymy of Hydroporus discretus (Fairm.) and H. nigrita 
(Fab.). The former he records as British, and refers to it the H. nigrita of 
Thomson’s Skand. Col. ii. and the H. puhescens of the same author’s supple- 
ment (ix.). H glahellus (Thorns.) ■= nigrita (Fab.), according to type from 
Thomson (p. 83). Sharp also points out the characters of H. melanarius and 
its ally H. celatus (Clark), and records H unistriatus as British. 
Bold (Ent. Mo. Mag. vi. p. 101) thinks that Sharp’s H. nigrita and II. 
discretus are sexes of the same species, chiefly because he has always found 
them in company. He gives other British localities for Sharp’s species. 
MoncreAff (Entom. 71, p. 350) records Hydroporus cuspidatus from 
Southsea, Hants. 
HeterhydruSy g. n., Fairmaire, I, c. p. 180. Represents abbreviated Agah(s, 
but allied to Hyphydrus, from which it diflTers in the mesosternum being 
completely covered by the prosternum, and by the posterior tarsi ending in 
a single, robust, flattened claw. Sp. H. agahoidesj sp. n., Fairm. ibid., 
Madagascar. 
New species : — 
Hyphydrus uniformis, Fairmaire, 1. c. p. 186, Madagascar ; H. acuminatus 
(Buenos Ayres) and mendozanus (Mendoza), Steinheil, Atti Soc. Ital. Sci. 
Nat. xii. p. 249. 
Hydroporus coquerelii, Fairmaire, 1. c. p. 180, Madagascar ; H. costipennis, 
Fairm. 1. c. p. 187, Ste. Marie de Madagascar ; H. monticola^ Sharp, Ent. M. 
Mag. vi. p. 84, Scotland and Wales ; H. parallelus, Shai-p, ibid., Scotland j 
H incognitus, Sharp, ibid., Britain ; H. hramianii, Schauf. Beitr. Kenntn. 
Col. Balear. pp. 9-10, Balearic Isles {? — vestitus, Fairm.); H. honariensis, 
Steinheil, 1. c. p. 249, Buenos Ayres ; H. jlavofasciatus^ Steinh. ibid., Achiras ; 
H. stroheli, Steinh. 1. c. p. 250, S. Luis. 
Colymbetides. 
Agahus tarsatus (Zett.) is recorded as British by Sharp, Ent. Mo. Mao- vi 
p. 84. 
New species : — 
Hydrocanthus funehris^ Fairmaire, 1. c. p. 187, Madagascar ; H, asperatus, 
Fairm. 1. c. p. 188, Madagascar ; H. fasciatus, Steinheil, I, c. p. 250, Buenos 
Ayres. 
