L. Harrison and T. H. Johnston 
349 
pair of short stout spines overlies the bases of the palps. The prothorax 
more resembles that of Heterodoxus, the expanded portion being semi¬ 
circular; while the central portion does not taper anteriorly as in 
B. notafusca. The second and third hairs from the lateral angle have the 
form of short stout curved spines. The meso- and metathorax have 
the same general form and chaetotaxy as in B. notafusca. The second 
tarsal joint is without the minutely spinous ridges on the inner face 
which characterise the last species. The femora of the second legs bear 
upon the post-axial surface, close to the trochanter, a pair of specialised 
spines similar to those of Paraheterodoxus mentioned below; and pre¬ 
sumably having a clasping function. The abdomen and genitalia are 
of the same general form as in B. notafusca. 
The $ exhibits the usual sexual dimorphism of the hind end of the 
abdomen, is without the spines upon the second femora, is slightly 
larger, and generally stouter in all measurements. 
Measurements in millimetres. 
3 
Length 
Breadth 
Length 
Breadth 
Head 
0-252 
0-420 
0-252 
0-438 
Prothorax 
0168 
0-353 
0-185 
0-370 
Mesothorax 
0-067 
0-269 
0-069 
0-070 
Metathorax 
0-185 
0-336 
0-204 
0-375 
Abdomen 
0-857 
0-638 
0-950 
0-706 
Total length and 
1-529 
0-638 
1-660 
0-706 
greatest breadth 
This small form we obtained in enormous numbers upon a long-nosed 
bandicoot, Perameles nasuta, caught at Woolloomooloo, Sydney, w 7 hich 
must have been the last survivor of its tribe in this now busy shipping 
centre. There must have been many thousands of this parasite upon 
it. We have named the species from the very active way in which it 
oscillates its antennae, and brings them into view, when alive. It 
belongs to a group which also includes B. tarsata Piaget, and B. uncinata 
next described, and which is distinguished from the notafusca group by 
the shape of the temporal lobes, which are not produced backwards 
behind the occiput. It is easily separated from the other two species 
of the group by the fact that the eye is not bounded posteriorly by a 
cleft. 
Boopia uncinata n. sp. Fig. 8. 
Description of $. Head short in proportion to its length, projecting 
strongly in front of eye; the latter prominent, with large pigment spot 
