478 REPORT OF THE HARVARD AFRICAN EXPEDITION 
is probably bifid, although this point could not be determined definitely in 
our specimens. 
Host. Damaliscus corrigum jimela (‘‘topi’’). 
Locality. Near Lake Edward, Congo. 
Location. On liver and mesentery. 
After comparing our specimens with a scolex of Taenia pisiformis from the 
dog, it is our opinion that the eysticercus encountered in topi conforms well 
enough with this species to be tentatively taken as its larval form. Taenia 
pisiformis is recorded from both the lion and leopard, both of which abound 
and doubtlessly prey upon the topi in the locality from which our material 
was secured. 
Trichuris trichiura (Linn., 1771) Stiles, 1901 
From the caecum of a red Colobus shot in Ituri Forest, Belgian Congo, 
three adult females of a species of T'richuris were obtained. The specific dis- 
tinctions of members of the genus is made on the basis of length of the spicules 
and the spinose character of its sheath. According to the recent study of 
Schwartz! (1926) no constant differences in the above-mentioned characters 
are to be observed in material derived from man, the chimpanzee, species of 
Cercopithecus and swine, although definite variations may be displayed in in- 
dividual worms. Schwartz concludes that until biological differences in their 
infectivity are established by cross-infection experiments, the identity of worms 
from these different hosts must be recognized. It is consequently very prob- 
able that the parasite collected from the monkey in this instance is J’richuris 
trichiura (Linn., 1771, Stiles, 1901) the type host of which is man. 
Enterobius sp. 
A probable member of the genus Hnterobius is represented in the form of 
eight darkly colored female worms collected from the same host and in the 
same location as the T’richuris just mentioned. The females are smaller (3.6 mm.) 
than those of Hnterobius bipapillatus as described by Gedoelst? (1916) from 
the intestine of a monkey (sp. non det.) of the Congo, and the eggs aver- 
aging 56u by 26u are also under the dimensions given for HL. bipapzillatus, but 
otherwise the structure of the female appears to coincide very well with this 
species. However, in the absence of males from our material, a specific de- 
termination is not possible. The fact that the genus Hnterobius, of which thus 
far there are at least four species reported, is represented solely from primates, 
does not afford any further clue to the species involved in the Colobus monkey. 
Streptopharagus pigmentatus v. Linstow 
The material consists of two tubes, one containing seven adults, 62 and 
1%, and the other 29? and 62’, from the small intestine of two specimens of Cerco- 
pithecus diana diana shot on the Du River, Liberia. 
The genus Streptopharagus Blanc, 1912, to which the parasites belong was 
‘ Schwartz, B.: Specific identity of whipworms from swine. Washington (1926), Jour. Agric. 
Research, XX XIII, 311-316. 
2 Gedoelst, L.: Notes sur la faune parasitaire du Congo belge. Rev. Zool. Africaine (Bruxelles. ) 
(1016), ¥, tase. L, 1-00. ; 
