DTTISCID^. 
Ins. 25 
Dytiscid^e. 
Camerano, L. Richerche intorno alle solcature delle elitre dei Ditiscidi 
come carafctere sessuale secondario. Atti Acc. Tor. xv. pp. 531-539. 
Sharp, D. Avis pr^liminaire d’une nouvelle classification de la famillo 
des DytiscidcB. CR. Ent. Belg, xxiii, pp, cxlvii.-cli. [Abstr. Ent. 
M. M. xvii. p, 187.] 
On sexual dimorphism in the females of Dytiscidce ; Sahjberg, Ent. 
Tidskr. i. pp. IGG & 1G7. In one form the elytra are smooth, as in the 
male, and in others punctured, or otherwise different. 
L. Camerano notices the Dytiscini of Piedmont ; Ann. Ent. Ital. xii, 
pp. llG-122. 
Haliplus rujicollis and European allies (11 species, 2 new) tabulated, 
and briefly characterized ; Wehncke, Deutsche E. Z. xxiv. pp. 223 & 224. 
H. rujicollis, heydeni, and immaculatus appear to be dimorphic forms ; 
and H, cinereus, Aube, is distinct from affinis, Steph. ; Bedel, Ann. Soc. 
Ent. Fr. (5) x. App. pp. 222 & 223, note, & 226, note. 
Ilygrohia tarda, Herbst. Stridulating apparatus described ; id. 1. c. 
p. 229, note. 
. Hydroporus angularis and signatellus, Klug, = thermalis, Germ. ; H. 
angularis, var. Klug, = klugi, Lepr. ; Leprieur, Bull. Soc. Ent. Fr, (5) 
X. p. XXV. 
Dytiscus. Shower of water-beetles in Kentucky ; Am. Ent. iii. p. 248. 
D. punctulatus, aberration intermediate between the smooth and furrowed 
$ $ ; Leprieur, 1. c. pp. cxxx. & cxxxi. D. harrisi, noticed and figured ; 
W. Saunders, Rep. E. Soc. Out. 1879, pp. 71 & 72, fig. 38. D. marginalis 
attacked by mites ; Sci. Goss. xvi. p, 165. 
New spccws : — 
Haliplus multipunctatus, N. Germany, and heydeni, N. & Central 
Europe; Wehncke, Deutsche E. Z. xxiv. pp. 223 & 224. II. samoje- 
dorum, Sahlberg, Sv. Ak. Handl. (2) xvii. No. 4, p. 45, N.W. Siberia. H. 
tumidus, Leconte, Tr. Am. Ent. Soc. viii. p. 166. II. natalensis. Natal, 
p. 72, syriacus, Syria, abhreviatus, Mesopotamia, p. 73, havaniensis, Cuba, 
sharpi, China, Japan, p. 74, brevis, China, and bistriatus, Adelaide, p. 75 ; 
Wehncke, S. E. Z. xli. 
Hyphydrus sumatrce, Regimbart, Notes Leyd. Mus. ii. p. 211, Sumatra, 
Hydrovatus atricolor and consanguineus, id. 1. c. p. 212, Sumatra. 
Ccdambus ungicularis, Sahlberg, 1. c. p. 47, fig. 14, N.W. Siberia. 
Hydroporus intermedius, sibiricus, p. 49, punctipennis and mnescens, 
p. 50, pectoralis, p. 51, and obovatus, p. 52, id. 1. c. N.W. Siberia. II. 
dorso-plagiatus, Algeria, p. 247, cribratellus Siud. productus, Batna, p. 248, 
Fairmaire, Ann. Soc. Ent. Fr. (5) x. II. strigicollis, id. Le Nat. ii. p. 293, 
Bourbon. II. strigosulus and II. (?) nitidicornis, Broun, Man. N. Z. Col. 
pp. 72 & 73, New Zealand. 
Hydrocanthus ritsemce, R(^gimbart, 1. c., p. 213, Sumatra. 
Laccopliilus ritsemce, id. 1. c. p. 209, Sumatra. 
Gaurodytes punctipennis, nigripalpis, p. 56, amnicola, p. 58, and slovzovi 
p. 59, Sahlberg, 1. c., N.W. Siberia. 
