1961] 
Causey — Adrityla 
133 
setae are about 0.35 mm.; the relative distances between them are 
as follow: 
med. seta — ext. seta 1 dorsal furrow — int. seta 1 
med. seta — int. seta 3 int. seta — med. seta % 
Mentum undivided. Clypeus, frons, and vertex with the usual 
short, unequal setae. Eyes triangular, from 23 to 25 black ocelli 
arranged compactly, but not touching, in rows of 1, 7, 6, 5, 4 (3), 
2 ( 1 ) , Antennae slender, the length approximately 4.3 mm. in the cf 
and 3.3 in the 9* 
In the male, legpairs 1 and 2 are about two-thirds the length and 
thickness of the following legs ; legpairs 3 through 7 are shorter and 
thicker than the postgonopodal legs and segment 4 bears an incon- 
spicuous rounded protuberance on the mesioproximal surface; the 
ventral surface of the coxa of legpair 7 is conspicuously swollen ; the 
ventral surface of the tarsus of all legs from the third to about the 
middle of the body is pulvillar; legpair 10 (8 1 ) is highly modified by 
the enlargement of the coxa and the coxal sac and by the reduction 
of the telopodite; and legpair 11 (8 2 ) has the coxa slightly swollen 
but lacks a coxal sac or coxal perforation ; the ectoventral surface of 
segment 2 of legpair 1 1 bears a small, rounded, caudally directed lobe. 
The anterior gonopod (Fig. 2) is an unsegmented, rectangular 
piece irregularly serrated on the ventral margin and directed down 
and slightly forward. In the coxosternal region it is contiguous with 
its homologue along a movable suture. The spiracle opens into a 
large depression near the anterior margin of the coxosternum. 
The posterior gonopod (Figs. 3 and 4) consists of the usual three 
segments : 1 ) a coxa with two elongated coxites, the mesial one in- 
conspicuous and narrowly attenuated, and the more lateral one longer, 
stouter, clavate, warty on the apical surface, and covered distad by 
the larger coxite of legpair 10; 2) a slender prefemur (one-third the 
length of the femur) with a setose lobe on the mesiodistal surface; 
and 3) a large oval femur (the ratio of the length to the thickness 
is 1/3) with an irregular pigmented pit on the caudal surface near 
the apex. The sternum is thin in the midline and bent sharply ventrad ; 
laterad it is fused with the coxae and thickened ; the spiracles open 
from large pigmented pits near the ectocephalic angles. 
Feg 10 consists of two regions: 1) an enlarged coxosternum with 
one massive coxite that curves back over leg 1 1 and covers the apical 
region of the larger of the two coxites of the posterior gonopod, and 
2) a minute telopodite of 2 or 3 unequal segments that cannot be 
