art.17. MONOPHLEBINAE AND MARGARODINAE—MORRISON. 43 
but still retains the pore collar, and the eighth pair is much re- 
duced, only a slender, delicate simple tube remaining in the single 
species in which these can be studied, suggesting the possibility that 
this pair may be wholly suppressed in some of the other members of 
the genus. In the larva the spiracles are very minute, simple open- 
ings, which have only been located with extreme difficulty, and only 
seven pairs of such openings have been found thus far. The derm 
of the adult female bears the large multilocular disk pores already 
mentioned, these being fairly uniform in size but with centers vary- 
ing from circular to elongate oval or triangular, and fairly large 
and stout hairs of variable length, which are more abdundant in par- 
ticular areas, as near the anterior apex of the body. There are, 
besides, some unusual setae, invaginated for perhaps half their length, 
fairly abundant at the inner end of the invaginated sac. The anal 
tube is simple, slender, and delicate. If the figures given by Signoret 
for the larva of C. westwoodi and by Fuller for C. bufo are entirely 
accurate, it is possible that good morphological characters for the 
separation of specimens of this stage of the known species may be 
found in the number and proportional length of the marginal ab- 
dominal setae, as these in the larva of australis, the only larva avail- 
able, are long on all the abdominal segments, while as figured in 
westwoodi and bufo only those at the apex of the abdomen are long. 
A tentative key to the species included in this genus, based largely 
on the information given in Mr. Fuller’s paper and quite possibly of 
little value if put into actual use with specimens collected in the field, 
has been drawn up and has been supplemented with certain illustra- 
tions from Maskell’s specimens. Mr. Froggatt has recently (1921) 
stated that C. bufo Fuller is the old final form of one of the other 
West Australian species, and, as it has not been possible to place it 
accurately in the key, it has been omitted. 
TENTATIVE KEY TO SPECIES OF CALLIPAPPUS. 
a’. External opening of abdominal pouch located ventrally near posterior apex of 
bony: (Muller) seiacctaee tice Se). sss Laps. Sep steels ee westwoodi Guerin Meneville. 
a?, External opening of abdominal pouch apical, not ventral. 
b!. Body more or less completely clothed (depending on condition) with brick 
to orange red, hair-like filaments...............-..-.rubiginosus (Maskell). 
b?. Body without such filaments, bare or with whitish waxy or glassy secretion. 
c!. External opening of abdominal pouch a linear transverse slit 
farinosus Fuller. 
c?, External opening of abdominal pouch circular to triangular or roughly 
8-shaped. 
d', Opening roughly 8-shaped; derm coarsely and uniformly punctured 
australis (Maskell). 
d?, Opening circular to inverted triangular; derm finely punctured 
immanis (Maskell). 
