ART. 17. MONOPHLEBINAE AND MARGARODINAE—MORRISON. 27 
loose cluster of disk pores just beyond its opening; with three pairs of 
much smaller, simple, abdominal spiracles located at the posterior 
apex of the body; derm pores all of the multilocular disk type but 
varying in size and appearance as shown in figure, and including, in 
the region of the genital opening, the larger multilocular pores with 
thin wall, as figured for the genotype; body with a number of rela- 
tively very large, stout, blackish setae, with stout heavily chitinized 
bases, scattered along the margin all the way round and among these 
and over the rest of the body, but never clustered or crowded, much 
smaller, relatively inconspicuous, pale setae, varying considerably in 
size, and on the average a little less abundant than the pores; anal 
opening a simple, circular, lightly chitinized ring with a short, lightly 
chitinized, internal tube; ventral cicatrices three in number, located 
posteriorly, the median a little the largest, all three elongate with 
the ends rounded. 
Larva.—Short oval, somewhat tapering behind, length 678u, width 
41lu; antennae 6-segmented, the sixth the longest and somewhat 
swollen; legs long and slender, the claws slightly curved, with a faint 
denticle near apex and with a pair of thread-like, faintly knobbed 
digitules slightly surpassing the tip of the claw; beak short conical, 
appearing indistinctly 2-segmented; number and position of spiracles 
as in adult; dorsal derm pores similar in appearance to most abun- 
dant adult sort, but smaller, ventral pores, as shown in figure, cir- 
cular with elongate center with two loculi, one on either side of 
its middle; dorsal body setae relatively very large and stout, in six 
(abdomen) or eight (thorax) longitudinal rows, all with bluntly 
rounded apices, and all but those along margin strongly curved and 
twisted close to the base; with several much smaller setae around 
the anal opening; ventral setae small, slender, inconspicuous; anal 
tube with a circle of pores around the mouth and with the collar of 
wax pores usually present at the inner end in larvae of this group 
faintly indicated; ventral cicatrices not observed; apical setae in two 
pairs, broken, but probably about as long as the body. 
Holotype and paratypes.—Cat. No. 25272, U.S.N.M. 
This species has been described from one adult female and one 
larva mounted on slides, and from two or three unmounted females, 
collected on Acacia hueglii, Swan River, West Australia, by George 
Compere (No. 950). 
In view of the lack of information regarding the normal habit 
characteristics of the adult female of this second species and certain 
structural divergences in the larvae, there is some question as to the 
correctness of the generic association indicated. With the limited 
material available for comparison, no definite key for separating the 
adults can be given; however, in australis the pores in the marginal 
band appear to be about twice as numerous for the same area as in 
