20 PROCEEDINGS OF THE NATIONAL MUSEUM, VOL, 62. 
adults, one much larger than the other, bearing the Maskell No. 284. 
Only the two slides have been available for microscopic study. 
Adult female.—External appearances described by Maskell; ap- 
parently naked; shape as mounted on slide elongate ovate, distinctly 
broadened behind, length 10 mm., maximum width 6.5 mm., derm 
clearing completely on treating with potassium hydroxide; antennae 
9-segmented, small, the basal segment greatly enlarged, the inter- 
mediate segments transverse, the apical elongate, almost lanceolate, 
the whole antenna tapering strongly from base to apex; legs very 
large and stout as compared with the antennae, with rows of slender 
spines on tarsus, tibia, and femur, claw entire, but the inner face 
often roughened, with two claw digitules of uncertain character (all 
broken); beak small, short, stout, incompletely 2-segmented; with 
two pairs of thoracic and seven pairs of abdominal spiracles similar in 
general to those of Monophlebulus, the abdominal located ventrally 
near margin, each with a collar of pores three wide around its open- 
ing; derm with pores of three sorts, small trilocular, scattered over 
most of the upper surface of the body, somewhat larger multilocular 
disk, with triangular, circular or short oval centers, found particularly 
dorsally around anal ring opening, and considerably larger multi- 
locular disk with elongate oval centers, occurring over most of the 
ventral abdominal area, and most numerous around the genital open- 
ing; derm spines very short, stout and blunt dorsally, longer but 
still stout with rounded apices toward the margin ventrally, abundant 
but not closely crowded, most numerous in a poorly defined band 
running around the body ventrally just inside the abdominal spira- 
cles; derm setae (as distinguished from spines by possession of basal 
collar) of two sorts, one short, stout, tapering but with bluntly rounded 
tips, the other, the normal slender, acutely pointed sort, usually much 
longer than the first, and found mostly around the anal opening and 
along the body margin; anal tube short, but of indeterminate length, 
with an external band of irregular wax pores, and on the dorsum 
immediately around the opening, a band of small setae, each pointing 
out, and, well outside of this, a single circle of very much larger, 
long, stiff setae; ventral cicatrices eleven in number, arranged in a 
semicircle about opposite the anal opening, the anterior four on each 
side circular to oval, the posterior three elongate, the size decreasing 
more or less continuously from the middle to apex of each horn. 
Larva.—Elongate, somewhat wider about the middle, outline 
irregular, length 9284, maximum width 400y, anterior apex tapering 
somewhat; eyespots prominent, conical, antennae 5-segmented, the 
third and fifth longest, the third sometimes with a suggestion of a 
further diversion; legs long; terminal portions slender; claw with 
three more or less pronounced denticles on apical half; beak very 
short and stout, segmentation not discernible; spiracles not discern- 
ible; derm dorsally with a few trilocular disk pores in longitudinal 
