24 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Both sexes are smaller than corresponding sexes of Chapinia 
traylori in all measurements except length and width of head (tables 
D2). 
ies Venter of third femora and posterolateral margins of abdom- 
inal sternites 1V-VI each with large thick brushes of normal seta. 
Each lateral margin of abdominal tergites II-VI with a short setae 
between the spiracle and postspiracular seta. Abdominal sternite IT 
with 42—54 total setae and one median row of setae on posterior margin. 
Terminal abdominal segments as shown in figure 10. Genitalia as 
shown in figure 9, endomeres with small inner plate and paired outer 
rims. 
Female: Resembles the male except that abdominal sternite II 
has 76-86 total setae. Terminal abdominal tergite with 16-22 long 
and 10-12 short setae on posterior margin; abdominal sternite VIII 
with 18-30 setae on posterior margin (fig. 35). Anal fringe with 
44-54 setae (fig. 36). 
Discussion: Although larger in size, Chapinia acutovulvata resembles 
most closely C. clayae. The venter of the third femora and postero- 
lateral margins of abdominal sternites IV-VI each have large thick 
brushes of normal setae in C. acutovulvata but small scattered brushes 
of normal setae in C. clayae. Abdominal sternite II of both sexes 
of C. acutovulvata has fewer total setae than in corresponding sexes of 
C. waniti but has more total setae than in corresponding sexes of 
C. malayensis. The male genitalia have endomeres possessing on 
each outer rim a triangular internal knob that is longer than wide in 
C. acutovulvata but wider than long in C. clayae. ‘These internal knobs 
are absent in other Chapinia. The female terminal abdominal ter- 
gite has on the posterior margin at least 26 setae in C. acutovulvata, 
of which approximately two-thirds are long and one-third are short, 
but at most 24 setae in C. clayae and C. malayensis, of which approx- 
imately one-half are long and one-half are short in C. clayae, but 
approximately two-thirds are long and one-third are short in C. 
malayensis. In addition this margin has on each side of midline at 
least six long setae in C. acutovulvata but at most five long setae in 
C. clayae. ‘The female abdominal sternite VIII has on the posterior 
margin fewer than 32 setae in C. acutovulvata but more than 34 setae 
in C. malayensis. Each lateral projection of the ventral sclerite 
between female vulva and anus has fewer than eight thick, posteriorly 
directed setae in C. acutovulvata, but more than eight in C. waniti 
(fig. 72 sp.). The female anal fringe has 44-54 setae in C. acuto- 
vulvata, at most 44 setae in C. clayae, and at least 56 setae in C. wanite. 
Material examined: 33 males and 35 females from fresh and dried 
material collected in the Oriental region; from the type host: 2 
females, Piaget, BMNH 1953-21; 2 males and 2 females from Nepal, 
