NO. 8558 MALLOPHAGA—ELBEL 47 
sexes of B. productus. Each lateral margin of abdominal tergites 
IJI-VI between the spiracle and postspiracular seta has fewer short 
setae in males and more in females of B. africanus than in correspond- 
ing sexes of B. productus. Abdominal sternite I has approximately 
twice the number of setae in both sexes of B. africanus as in corre- 
sponding sexes of B. productus; abdominal sternite IT has slightly 
fewer setae in males and slightly more setae in females of B. africanus 
than of B. productus. The male abdominal sternite VIII has a central 
T-shaped plate in B. africanus which is absent in B. productus. The 
male genitalia has the internal branch connecting the parameres 
posterior to the endomeres rounded medially in B. africanus but 
pointed in B. productus. The female anal fringe has more than 58 
setae in B. africanus but fewer than 58 setae in B. productus. 
Comparison on different hosts: No morphological differences were 
found between specimens of Bucerophagus africanus found on the two 
hosts, Bucorvus abyssinicus and B. leadbeateri, so standard measure- 
ments were tested against the null hypothesis that there were no 
differences in measurements (tables 8-11). 
Terminology and formulae were the same as those used for Bucer- 
ophagus productus except as follows: 
X;=mean measurement of B. africanus specimens on host 1, Bucorvus abyssinicus 
X,;—=mean measurement of B. africanus specimens on host 2, Bucorvus leadbeateri 
s?=variance of measurements of B. africanus specimens on host 1, Bucorvus 
abyssinicus 
s3=variance of measurements of B. africanus specimens on host 2, Bucorvus 
leadbeateri 
Since it is not possible by measurements alone to decide from 
which host specimens came, populations from two hosts are con- 
sidered conspecific. 
Material examined: 13 males and 13 females from fresh and dried 
material collected in the Ethiopian region; from the type host: 1 female 
from Mafa, South-West Africa, February 1923, BMNH; 9 males and 
7 females from Cameroons Zoo, Africa, November 1936, BMNH 8127; 
1 female from CNHM< skins from Kari Pan, Makari, Bechuanaland, 
Africa, August 1930, collected by Vernay, Lang, and Roberts, REE; 
from Bucorvus abyssinicus (Boddaert, 1783): 1 male and 1 female from 
Koubadge, French Cameroons, Africa, July 1947, collected by V. 
Aellen, BMNH 1954-487; 2 males and 2 females from USNM skins 
from Sirre, Ethiopia, Africa, Feb. 13, 1912, collected by Childs Frick, 
REE; 1 male and 1 female from Nyala, Sudan, Africa, Feb. 12, 1949, 
KCE. 
Drawings were made of a male and a female from the type host 
collected in the Cameroons Zoo. Specimens in BMNH. 
