174 
Sir William Dawson, lias divided caverns into those of driftage, 
interment, and residence.* The Rock-shelters of Eastern Aus- 
tralia are clearly a combination of the two latter, similar to some 
of the European caves mentioned by him, such as the Dordogne 
and Mentone Caves. 4 4 The accumulation of ashes, bones, and 
other remains,” says Dawson, “ is in exact accordance with the 
want of cleanliness of the ruder American tribes, and also with 
the habits of a people who in summer live in the open air, or in 
temporary cabins or wigwams, and only in the colder months or 
in bad weather resort to more secure and permanent abodes.” f 
No doubt this equally describes the occupancy of our Rock- 
shelters. 
The absence of bones of mammalia in the refuse heaps at the 
mouths of the latter, other than those of recent species, is strong 
confirmatory evidence of the non-existence of man together with 
the extinct mammalian fauna of Australia. 
DESCRIPTION OF A NEW PELAGIC HEMIPTERON 
FROM PORT JACKSON. 
By Frederick A. A. Skuse. 
(Entomologist to the Australian Museum.) 
Halobates whiteleggei, sp. n . 
(Plate xxvii., figs. 1-10.) 
Ovate, widest behind the middle. Glaucous above, with a silvery 
bloom; yellowish-ochreous beneath. Antennae (including jointlets) 
and legs black, with a very minute greyish pubescence. Head 
with two triangular reddish-yellow spots, which do not meet on 
the hind margin. 
Male and female . Antennae at the base, antennal tubercles, 
prosternum, coxae and trochanters, and a spot (more prominent 
in female) beneath the base of femora, in the fore-legs, coxae and 
trochanters (with the exception of a black spot beneath), in 
intermediate legs, a spot beneath the apex of coxae, and the outer 
margin of trochanters, in the hind-legs, fore and intermediate 
acetabula beneath, and margin of first and whole of second genital 
segment above, and all beneath, ochreous. Apical half of the 
* Fossil Men, 1883, p. 222 
f Ibid , p. 220. 
