HORN EXPEDITION—COLEOPTERA. 
255 
N. dispar, Germ. var. ? (1), Rudall’s Creek. The example of this insect is 
unfortunately a female, so that its species cannot be cleterminecl with certainty. 
It does not dirter from N. dispar of the same sex except in the absence of dark 
markings on the prothorax and perhaps a slightly narrower form. 
PLATYNECTES. 
P. decempunctatus, Fab. (2), Palm Creek. 
RHANTUS. 
R. pulverosus, Steph. (14), Finke River, Oodnabarrina, Painta Spring, Ellery 
Creek. 
SANDRACOTTUS. 
.S', guttatiis, Shp. (14), Painta Spring, Bagot’s Creek. 
ERETES. 
E. austraiis, Er. (41), Finke River, Palm Creek, Storm Creek. 
CYIHSTER. 
C. tripjaictatus, Oliv. (2), Illara Water, Possum Creek. 
GYRINID^. 
DINEUTES. 
D. australis, Fab. (1), Finke River. 
HYDROPHILID^. 
HYDROPHILUS. 
H. albipes. Cast. (15), Oodnadatta, Macumba Creek, Possum Creek. This 
species appears to me identical with H. mficortiis, Dej., Cat., 3 ed. The latter 
is the older name, but there is a H. ruficornis. King., older still, and it does not 
seem at all clear that it is identical with H. rupicomis, Dej. I do not see any 
reason, judging by the description, to regard H. brevispina, Fairm. as distinct. 
Fairmaire’s name, however, is much later. 
