2 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
located just cephalad of the cephalic end of the lateral ala. 
Excretory pore opens between tubercles of the median ventral rows, 
or on a transverse scute as in other species, just cephalad of the 
junction of the nonmuscular and muscular portions of the esophagus. 
Nonmuscular portion of the esophagus short, about 0.5 mm. in 
female, 0.4 mm.in male. Muscular portion long, 
in female about 4.5 mm., much shorter (2.85 mm.) 
in male. 
Male.—The caudal alae enclose the tip of the tail 
and are asymmetrical (fig. 2), the right wing being 
somewhat longer than the left. ‘There are usually 
six preanal and four postanal papillae on each side, 
though the number varies. ‘The anus is about 
0.250 mm. from the tip of the tail. The caudal 
glands are subterminal. The right spicule (fig. 3) 
is short and stout, slightly curved and twisted, and 
measures 0.120 mm. between ex- 
tremities in a straight line. The 
left spicule is very Jong, much 
thinner. Itis about 10 mm. long. 
At its cephalic end it is infundi- 
buliform, obliquely and irregu- 
larly emarginate. The ‘gorge- 
ret”’ consists of two portions, a 
straight part, lying parallel to 
the short spicule and about 0.055 
mm. long, and an oval part, lying \ 
dorsal of the spicules and di- 3 \y 
rectly back of the genital open- of 
ing, about 0.029 mm. in diame- pg eRe moe 
ter, giving a total length of ND GorceReT or 
MALE (ENLARGED). 
Viet Goneeroneus 0-084 mm* for theorgan. 
SUE Female.—The tail is rather blunt and slightly 
~~ curved, with subterminal caudal glands. The anus 
is about 0.200 mm. from the tip of the tail. The vulva is slightly 
salient, 1.75 mm. from tip of tail. The vagina is long, extending 
cephalad from the vulva to about the middle of the body length. 
The uteri are divergent and extend nearly to the extremities of the 
worm, merging into the oviducts and ovaries at these points. Eggs 
ovoid, embryonated in vagina, averaging 55.5u long by 32u wide. 
