42 
RECORDS OF TIIE AUSTRALIAN MUSEUM. 
NOTES ON AUSTRALIAN AQUATIC HEMIPTERA. 
(No. 1.) 
By Frederick A. A. Skuse, F.L.S., Entomologist. 
[Plate XI.] 
The following are descriptions of two species of fresh-water 
Hemiptera, found commonly in the vicinity of Sydney, and 
which appear to be novelties. As opportunity occurs, the 
author hopes to supplement them with diagnoses of further 
species inhabiting the fresh-water creeks and ponds of New 
South Wales, and, if possible, of those of the neighbouring 
colonies : — 
Family Hydrometridje. 
Genus Hydrometra, Fab. 
HyDROMETRA AUSTRALIS, Sp. UOV. 
(Plate xi. fig. 3.) 
Above black or olive-black, shining; beneath yellowish-grey 
with a silvery bloom. Head with two longitudinal orange-yellow 
lines connected on the hind margin, and an orange spot or short 
line before the eyes. Antennas black ; first joint about one-third 
the length of the whole taken together. Pronotum parallel, 
coniform posteriorly, bordered with an orange-yellow line, and 
with a longitudinal line traversing about one-sixth of its length, 
and two very short (sometimes indistinct) longitudinal lines 
anteriorly ; obtusely tuberculated anteriorly. Pleuras and coxse 
striped or spotted with orange-yellow. Elytra wanting. Abdo- 
minal segments with a more or less distinct interrupted median 
orange-yellow line. 
Length . — 8 mm. 
Rah. — Sydney, N.S.W. 
