HYDROPHILIDii:. 
249 
states. This ' tribe ' comprises all the genera of Hydrophilidce in which 
the middle and hind tarsi have the first joint very short, with all the joints 
cylindrical, or not compressed : the thorax is always as wide as the 
elytra at the base ; and there is no metasternal spine. It is divided into 
sub-tribes Hydrohiini (Berosus, Chcetarthria, Limnocharis, Laccohius, 
Hydrohius, PhUhydriis), with head in front of eyes narrow, and labrum 
visible, and Helopeltini (new : for one new genus), with clypeus broadly 
dilated at sides, and labrum concealed. Berosus immaculatus, Zimm., auritus, 
Mels. (= jjereyrinus, Hbst.), and pantlterinus, Lee, are possibly all one 
species, for which Herbst's name should be used ; B. pallescens, Lee, = 
exiguiis, Say ; B. califomicus, Mots., punctidatus, Lee, = infiiscatus, Lec. ; 
B. fratemus and ordinatus^ Lec, = striatus^ Say. Chcetarthria nigriceps, 
Lec, = pallida, Lec. Philhydriis maculifrons, Mots., =■ pectoralis, Lec. ; 
P. simplex, Lec, = ochraceus, Mels. ; P. limhalis, Mels., = ductus, Say ; 
P. imbellis, Lec. ? = dorsalis, Mots. ; P. semistriatus, Zimm.., =fiinhriatus, 
Mels. ; P. nitens, Zimm., = rotimdus, Say. Sperchopsis, Lec, and Para- 
cymus, Thoms., are not generically distinct from Hydrohius. H. seriatus, 
insculptus, and regidaris, Lec, = fuscipes, L. 
Schwarz's paper, " Zur Kenntniss der europaischen Philhydrus-Arten," 
Breslau, 1872 (extr. from Z. E. Ver. schles.) has not been seen by the 
Recorder. 
Berosus : observations on a species with spined elytra only in $ , from 
Bone, by Leprieur, Bull. Soc. Ent. Fr. (5) iii. p. cxxvi. 
Helopeltis, g. n., Horn, I. c. p. 137. Type of a distinct sub-tribe, with 
gense at the sides broadly dilated, and labrum entirely concealed beneath 
the clypeus in front. But for these characters, a true Philhydriis, with 
the last tarsal joint more elongate than usual. H. larvalis, sp. n., id. 
ibid. Louisiana and Sonora (facies of Peltis, or an Elmis larva) ; a closely 
allied Cuban species is also mentioned, ibid. 
Limnocharis, g. n., id. Tr. Am. Ent. Soc. iv. p. 144, fig., allied to 
Limnebius, but abdomen with 8 joints : hind legs not ciliate, outer edge 
finely spinulose. L.piceus, sp. n., id. ibid., California. 
Cypjrimorphus, g. n., (? Fairmaire) R. Z. (3) i. p. 334. Allied to Vol- 
vulus, but more convex ; shorter, with divided eyes and slender tarsi. 
Facies of Cypris {Crustacea) or of a small bivalve shell. C. compressus, 
sp. n., Fairmaire, c. Morocco. 
Hydrophilus cognatus and japonicus, spp. nn., D. Sharp, I. c. p. 57, 
Japan. 
Hydrochares ajjinis, sp. n., id. I. c. p. 58, Japan. 
Hydrobius scabrosus, N. Cahfornia, Oregon, Vancouver I., and latus, 
Cahfornia, p. 133, rufiventris, p. 135, S. Oregon, dissimilis, p. 136, San 
Francisco, Horn, P. Am. Phil. Soc. xiii. ; H. solstitialis, p. 133, j^unctatus, 
p. 134, Peru, Kirsch, B. E. Z. xvii. : spp. nn. 
Philhydrus fucatus, p. 127, Utah, Arizona, P. (Helochares) punctati- 
striatus, p. 131, California, Horn, I. c. ; P. japonicus and simulans. Sharp, 
Tr. E. Soc 1873, p. 59, Japan ; P. nigritus, id. An. Soc. Esp. i. p. 262, 
Reinosa, Escorial : spp. nn. 
Helochares striutaa and lewisil^anlus, spp. nn,, id. Tr, E. Soc 1873, p. 60, 
Japan, 
