358 
PACIFIC SCIENCE, Vol. XII, October, 1958 
Distribution of Character Variants, Larvae 
1 
2 
3 
4(si) 
5(e d ) 
6(fi) 
7(s 2 ) 
P.b 
P.q 
P.d 
a 
b 
a 
30 
32 
? 
a 
b 
.47-.52(.49) 9 
.35-.48(.42) 10 
? 
.65-.7l(.69) 9 
.64-.71(.66) 10 
? 
.45— .58 (.53) 9 
.38-.55(.51) 10 
.47-.54(.51) 10 
,40-.50(.45) 10 
8(f 2 ) 
9 
10 
11 
12 
13 
14 
P.b 
P-q 
P.d. 
.45— .55 (.5 1) 10 
-35— -49(.43) 10 
a 
a 
a 
2.43 11 
3-38 9 
2.76 1 
1.09 11 
1.23 9 
? 
2.92 11 
3-5 1 9 
2.15 
216-236 11 
188-208 9 
(compressed) 
387-441 M 10 
356-383 m 5 
331-351 ix 
anterolateral lobes of the scutum, extending 
from the anterior end to .21 are well devel- 
oped, bearing 22 to 25 setae on each side, 
most of which are concentrated on the lateral 
arms. Sensilla situated at .39, appearing com- 
pletely smooth even at magnifications of 
1000 X (oil immersion). Beginning at .32 and 
extending anteriorly is a deep furrow which 
widens gradually as it approaches the anterior 
margin of the scutum; at about .05 this fur- 
row widens abruptly and disappears on the 
general surface of the scutum. In the speci- 
men studied, there are three setae at the level 
at which the furrow disappears. Behind the 
constriction at .21, the scutum widens per- 
ceptibly around the area sensilligera and then 
tapers gradually toward the posterior end. At 
.79, the scutum is reduced to the thickness of 
the crista metopica alone. The crista is dis- 
tinctly swollen between .90 and 1.0, with pig- 
mented cuticle completely encircling the de- 
pression in the end of the crista. In the por- 
tion of the scutum between .21 and .79, there 
are 31 elongate peripectinate setae similar in 
form to those on the anterior portion of the 
scutum. In the specimen examined, 16 of 
these are on the left side and 15 on the right 
side. The marked indentation at .27 in the 
specimen from which Figure 20 was drawn 
was absent from the other side of the scutum. 
The elongate peripectinate setae on the sur- 
face of the propodosoma lateral to the scutum 
are borne on subconical papillae as are those 
on the hysterosoma. Ocular plates peduncu- 
late, bicorneate. Anterior margin of hystero- 
soma projecting well beyond the posterior 
margin of the propodosoma so that the pos- 
terior portion of the scutum is hidden in 
dorsal view; setae along anterior margin of 
hysterosoma somewhat more slender and also 
smoother than those covering the rest of the 
body. Otherwise the setae of the hysterosoma 
are all of one type, heavily barbed, peripecti- 
nate, and the alveoli are at the apex of 
truncate conical papillae. 
Setae of coxae I and II fairly stiff, peripecti- 
nate for about three-fourths their length, then 
smooth out to the usually rounded tips. Pars 
medialis coxae of rather unusual form, arising 
from inner angles of coxae I, and forming a 
narrow border about 15 /x wide around the 
convex inner angle of coxae II. The pars of 
right and left side are contiguous medially 
and may even appear to be fused in undis- 
sected specimens (Fig. 19). The pars medialis 
coxae contain 5 to 8 setae each, and because 
of their close approximation, the intercoxal 
area is completely isolated from the mem- 
branous cuticle behind the coxae; it contains 
between 25 and 40 closely packed peripecti- 
nate setae, somewhat shorter and thicker than 
the ones behind coxae II. Supracoxal seta 
slender, smooth; coxal ring of I and II both 
open dorsally. Membranous cuticle between 
coxae II and III apparently devoid of sclerites. 
Coxae III and IV as shown in Figure 24, coxal 
rings complete dorsally. No trace of a 
Lassenia-otgun was seen at coxa III although 
the dense vestiture may have concealed it. 
Genital and paragenital sclerites both well 
developed (Fig. 2); genital sclerites with 48 
to 55 peripectinate setae each, the paragenital 
sclerites with about 56 setae each. Most of 
the setae have four to six whorls of barbs 
