26 Ins. 
COLEOPTEKA. 
Copelatus nigricollis^ Oliviera, J. Sc. Lisb. xxvii. p. 152, Angola. C 
tenebrosus^ R^gimbart, 1. c. p. 210, Sumatra. 
Hydatkus litigiosus, id. Z. c., Sumatra. II. sesquivittatus^ Fairmaire, Le 
Nat. ii. p. 164, Central China. 
Gyrinidji. 
Orectochilus villosus^ Miill. Habits ; H. Kolbe, Deutsche E. Z. xxiv. 
p. 228. 
Dineutes fulgidus^ sp. n., R^gimbart, Notes Leyd. Mus. ii. p. 213, 
Sumatra. 
Orectochilus spmiger^ p. 214, suhsulcatus and scaZa?’zs, p. 215, id. 1. 6*., 
Sumatra ; 0. pallido-cinctus, Fairmaire, Le Nat. ii. p. 236, Ann. Soc. Ent. 
Fr. (5) X. p. 325, Nossi-B6 : spp. nn. 
HYDROPHILJDiE. 
Camerano, L. Nota sopra un caso di colorazione naturale delle trachee 
di un insetto {Ilydrophilus piceus). Atti Ac. Tor. xv. pp. 703-706. 
CiiATiN, J. Le courant de Dewar chez les Insectea. Bull. Soc. Philom. 
(7) iv. pp. 189-192. 
On experimenting on the eyes of Hydrophilus piceus, the insect 
exhibited most uneasiness, and the galvanic angle reached its maximum 
of deviation, as in Vertebrates, under the stimulus of green and yellow 
light. 
Bedel, Bull. Soc. Ent. Fr. (5) x. pp. Ixxii., Ixxiii., cxli., cxlii., cxlvii., & 
cxlviii., makes the following synonymic notes on this family : Hydro- 
philus convexus^ Cast., = paulinierij Gu^r. ; H.flavipalpis and mundus, 
Boh., belong to Hydrochares ; II. ohlongus^ Oliv., is omitted by Harold ; 
Hydrobius angustatus, Villa, = fuscipes, Linn. ; H. assimilis^ Boh. (= 
natalensis, Gemm.), belongs to Philhydrus ; II. consputus and striatus^ 
Boh., belong to Hydrochares ; Limnebius granulum^ Mots., and gyrinoides^ 
Aub^, belong to Hydroscapha {Trichopterygidce') \ Stagnicola, Montr., = 
Helochares, Muls. ; Ochthebius fabricii^ Montr., belongs to Codostoma, Br. 
(= Cyclonotum, Er.) ; Laccobius globosus, Heer, = minutuSy Linn. ; 
Hydrobius nitiduSy Heer, = Anaccena limbata, Fabr. ; Berosus corsicus, 
Desbr., = signaticollisy Charp. {cericeps. Curt.) ; B. geminus, Reiche, is 
very close to the same species; Ccelostoma senegalense, Cast., is an Amphi- 
ops ; Cyprimorphus compressus, Fairm., = ? Amphiops lucidus, Er. ; 
Hydrobius seriato-punctatuSy Perris, belongs to Hemisphcera \ Ochthebius 
pyrenceus, Fauv., = ceratus, Steph., and the genus Sepidulum, Lee., = 
Epimetopus, Lac. ; Spheeridium striolaturriy Heer, = scarabceoides, Linn. ; 
S. testaceuiriy Heer, = bipustulaturriy var. marginatum, Fabr.; Cercyon 
pulchellum,'S.QQv,— Marsh. (= centro-maculatum, Sturm) ; and 
C. castaneum, Heer, = Megasternum bolitophagum. Marsh. 
Hydrophilus piceus, habits; P. Chambolle, Feuill. Nat. x. p. 181. II. 
triangularis. Say, noticed and figured ; Saunders, Rep. E. Soc. Ont. 1879, 
pp. 72 & 73. 
