642 
The Philippine Journal of Science 
1921 
two, stout, usually slightly clavate, spiracular spines, none of 
these to be found in some specimens, and all probably easily 
broken off, these spiracular characters so easily disarranged in 
mounting that it is almost impossible to determine the exact 
relations; submentum apparently 1-segmented, broadly rounded 
apically; body margin with two rows of slender setae, those in 
the lower row smaller, set relatively close together, the other row 
with the setae much more widely separated, larger, the bases of 
the hairs in both about the same diameter, none of the larger 
setae quite so long as the spiracular spines; with an occasional 
small dorsal seta; with numerous 8-shaped pores and elongate 
tubular ducts dorsally, these particularly crowded along the 
body margin ; and with two groups of cribriform plates running 
cephalad, one on each side of the middle line, from opposite the 
anal ring region, these groups distinctly separated from each 
other, and each made up of numerous plates, the number of these 
varying considerably, but averaging around seventy to eighty; 
ventrally with a cluster of multilocular disk pores around and im- 
mediately posterior to the anal ring region, with some similar 
transversely scattered ones anterior to this, and with smaller 
quinquelocular pores in the chitinized marginal plate of each spi- 
racle; anal ring about 54 to 64 /x long, nearly circular, broadly 
open behind, with ten large, flattened setae, these as much as 132 
jx long, and with a single row of pores, this anal ring surrounded 
by a heavily chitinized structure, with its upper and anterior half 
arched and its lower half broadened posteriorly on each side into 
a sort of triangular lobe with recurved posterior margin ; with a 
pair of setae in the bottom of the ventral groove thus formed and 
a pair, arranged longitudinally, on the posterior margin of each 
lateral lobe ; in only one specimen, of those examined, with more 
than ten anal ring hairs, in this case with seven on one-half of 
the ring and five on the other, the extra setae apparently resulting 
from the division of the two anterior ones of that side. 
Intermediate-stage female . — Such intermediate-stage speci- 
mens as have been available for examination show only a lesser 
development of the adult structures, except that the cribriform 
plates are wholly wanting. 
Larva . — Only embryonic larvae have been available for ex- 
amination, so only certain structures can be characterized. 
Antennae 6-segmented, legs stout and short, total length about 
that of antennae, the tarsal claw large, all four digitules long, 
slender and slightly knobbed at apices, the tarsal projecting a 
little beyond those of claw, both extending beyond apex of claw ; 
