INSECTA COLEOPTERA. 
169 
Aube (Ann. d. 1. Ent. Soc. d. Fr. xi. p. 229). H. Schaumei is from 
Sicily, H. polonicus from Warsaw. Of the latter, the description of the 
male is added (ibid. p. 345). A third new species is H. lautus, Schaum 
(Germ. Zeitschr. iv. p. 187), from Mansfeld Salt Lake. 
Kiellerup (Kroyer’s Nat. Tidsskr. iv. p. 318, 337) asserts, that Ilali- 
plus jiuviatilis, Aube, is identical with II. rujicollis, and II. Uneatus, 
Aube, with H. ohliquus, as they pass into each other. I have not ob- 
served such transitions. H. Jiuviatilis and rujicollis are very evidently 
distinguished ; neither have I ever found H. ohliquus and lineatus in 
company. Haliplus ater, Redtenbacher (Coleopt. Aust. p. 8), allied to 
the H. impressus, but quite black, appears to be a doubtful species, and 
the more so, as one individual only has been found. 
New New Holland Dytisci are Eunectus helvolus, Erich. (Arch. 1842, 
i. p, 134), from Van Diemen’s Land; and Cyhister insularis, Colymhetes 
7nonostigma, and Hydropot'us collaris, Hope (Proceed. Ent. Soc. p. 47), 
from Port Essington. 
Schiodte has given a description of the azygos system of nerves of 
the pharynx in the Acilius sulcatus, in Kroyer Naturh. Tidsskr. iv. 
p. 104, t. 1. 
Gyrini. — The German Gyrmi have been subjected to a complete revi- 
sion by Suffrian (Ent. Zeit. p. 219). The presence of the G. strigipennis, 
Sutfr. (st7uatus. Aube), in Northern Germany (at Elberfeld and Stettin), 
is worthy of attention. With G. marinus Suffrian joins G. ceneus, 
Leach, cBratus, Steph., as well as a variety G. anthracinus, St., and 
G. dorsalis, Gyll. ; but he considers the G. ceneus, Aube, as the same 
with G. opacus, Sahlberg, so that the former represents the species, the 
latter a dark blackish variety. Finally, he separates a third species, 
G. nitC7is, Parr., from both these, which is found in the South of 
Europe, and which unites to the form and the smooth interstices of the 
striae in both sexes of the G. mergus, the black indexed margin of 
the G. marinus. The remark which the author appends, that he has 
often observed the Orectochilus villosus swimming about, in the day 
time, on the surface of water, is chiefly important on this account, that 
it does away with an opinion expressed by Ahrens, that the O. villosus 
is a nocturnal insect, and prevents this from becoming, through frequent 
repetition, an accredited fact. 
Dineutes Gouldii and Gyrinus iridis, Hope, are new species from 
Port Essington, in New Holland. (Proceed. Ent. Soc. p. 48.) 
Staphylini. — Holme has published some remarks on the habits, 
manners, &c. of British Brachelytra (Trans. Ent. Soc. Lond, iii. p. 108). 
They chiefly refer to Stephens’ Illustrations. The author remarks, in an 
appendix, that many of the supposed species in that work Stephens 
himself has reduced in his Manual, which has since appeared, and that 
a still greater reduction must be made, since he has convinced himself, 
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