NO. 3558 MALLOPHAGA—ELBEL 33 
Piaget’s specimens of a headless female and 2 nymphs from Buceros 
cassidiz= Rhyticeros cassidix (Temminck, 1823) were conspecific with 
Rudow’s hirtum from Buceros ruficollis=Rhyticeros plicatus ruficollis 
(Vieillot, 1816). Through the courtesy of Dr. Clay, Piaget’s speci- 
mens have been examined, and they do not appear to be conspecific 
with Chapinia hirta (Rudow, 1866). They are described herewith 
as part of the type material from Rhyticeros cassidiz. 
Both sexes are smaller than corresponding sexes of Chapinia tray- 
lori in all measurements except length of head, but this measurement 
in the male is larger than in males of other Chapinia (tables 1, 2). 
Male: Venter of third femora and posterolateral margins of ab- 
dominal sternites [V-VI each with small scattered brushes of normal 
setae which are not as numerous on abdominal sternite VI. Each 
lateral margin of abdominal tergites II-VI without a short seta 
between the spiracle and postspiracular seta. Abdominal sternite IT 
with 62-64 total setae and three median rows of setae. ‘Terminal 
abdominal segments similar to those of C. boonsongi. Genitalia as 
shown in figure 20, endomeres with inner plate and paired outer rims. 
Female: Resembles the male except that abdominal sternite II has 
54-68 total setae. Terminal abdominal tergite with 14 long and 8 
short setae on posterior margin; abdominal sternite VIII with 20-24 
setae on posterior margin (fig. 46). Anal fringe similar to that of C. 
hirta, with 46-50 setae. 
Discussion: Chapinia lydae superficially resembles C. hirta. Ab- 
dominal sternite IT in both species has approximately the same number 
of total setae in females as in males and three median rows of setae. 
Abdominal sternite II of other members of the acutovulvata species- 
group has more setae in the females than in the males and 1 or 2 median 
rows of setae. The male genitalia in C. lydae are wider than in C. 
hirta, and the parameres are enlarged anteriorly only in C. lydae; the 
endormeres have an inner plate and paired outer rims in C. lydae, but 
endomeres apparently are absent in C. hirta. The female terminal 
abdominal tergite has on the posterior margin in C. lydae 3 or 4 long 
setae on each side of the midline, the two median setae being as widely 
spaced as four times the distance between each of the 3 or 4 long setae, 
but in C. hirta 5 long setae on each side of the midline yield a total of 
10 setae that are evenly spaced. 
Material examined: 3 males and 5 females from dried skins col- 
lected in the Celebes. 
Type material: Holotype male and allotype female from USNM 
skins from Palaleh River, Celebes, Aug. 9, 1914, collected by H. C. 
Raven, LE in USNM. Paratypes: 2 males and 3 females with same 
data; 1 female, Piaget, BMNH, 1928-325. 
Chapinia lydae is named for my wife, Lyda, in appreciation for the 
221-522—67——3 
