20 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
and C. malayensis. Abdominal sternite II has more total setae in 
both sexes of C. waniti, C. acutovulvata, and C. hoplar than in corre- 
sponding sexes of CO. malayensis, C. wenzeli, C. blakei, and C. traylori; 
more total setae in females than in males except in C. lydae; and 
setae are arranged in one median row except for one or two median 
rows in C. waniti, two median rows in C. traylori, and three median 
rows in C. lydae. The male genitalia have endomeres with an inner 
plate and paired outer rims in C. clayae, C. waniti, C. acutovulvata, 
C. malayensis, and C. lydae, the paired outer rims possessing internal 
knobs only in C. clayae and C. acutovulvata and serrulations only in 
C. waniti; the inner plate possessing paired lateral flanges and central 
terminal point only in C. malayensis; only paired outer rims in C. 
hoplai, OC. boonsongi, and C. wenzeli, the posterolateral margin being 
split in C. wenzeli; and only paired plates in C. blake and C. traylori. 
The female terminal abdominal tergite has on the posterior margin 
at most 24 setae except for C. waniti, C. acutovulvata, and C. hoplar 
with at least 24 setae; of these setae approximately two-thirds are 
long and one-third are short in C. wanitv, C. acutovulvata, C. malayensis, 
C. boonsongi, and C. lydae; approximately one-half are long and one- 
half are short in C. clayae, and C. hoplai; these setae are arranged 
with at least five long setae on each side of the midline in C. acutovulvata 
and C. malayensis but at most six setae in all other species of the 
acutovulvata species-group. In the female the ventral sclerite be- 
tween the vulva and anus is curved sharply on the anterior margin 
in C. clayae and C. acutovulvata but is only slightly curved in the other 
species of the group; on each lateral projection of this sclerite there 
are 4-6 thick, posteriorly directed setae except in C. waniti which 
has 10 or 11 and in C. traylori which has 2 or 3 (figs. 43 sp, 44 sp, and 
72 sp). The female abdominal sternite VIII has on the posterior 
margin the most setae in C. malayensis with more than 34 and the 
fewest in CO. blakei with at most 18. The female anal fringe has at 
least 44 setae in C. waniti, C. acutovulvata, C. malayensis, C. hoplar, 
C. boonsongi, and C. lydae but at most 44 setae in C. clayae, C. wenzeli, 
C. blakei, and C. traylori. 
Were the species of the acutovulvata species-group arranged according 
to the phylogeny of their hosts (Peters, 1945), the order would be: 
C. clayae, C. waniti, C. wenzeli, C. blakei, C. lydae, C. boonsongi, 
C. malayensis, C. acutovulvata, C. hoplai, and C. traylori, rather than 
C. clayae, C. waniti, C. acutovulvata, C. malayensis, C. hoplai, C. 
boonsongi, OC. wenzeli, CO. blakei, C. traylori, and C. lydae, which is 
based on morphological similarities of the lice. 
