NOTES AND DESCRIPTIONS OF SOME PARASITIC HELMINTHS 465 
SYSTEMATIC POSITION 
The species described above is a typical member of the genus Dicrocoelium 
Dujardin, 1845, the number of species of which is large. They are distributed 
in a cosmopolitan manner in reptiles, birds, and mammals, usually occupying 
the bile and pancreatic ducts. The course that the intestinal caeca pursue, ex- 
ternal to the line of vitelline glands is rather unusual, but the present species 
shares this character, at least, with D. hospes Looss,! 1907, found in Egyptian 
cattle, and with D. macrostomum Odhner,? 1911, of Nwumida ptilorhyncha 
from the White Nile. The present species resembles D. macrostomum to a re- 
markable extent, the two forms being almost identical with regard to the size 
and disposition of the organs. The only differences that can be detected from 
Odhner’s description of the species concerns the inconspicuousness or absence 
of a receptaculum seminis (not mentioned in D. macrostomum) and a slightly 
greater length of the intestinal caeca relative to the total length of the body. The 
former difference may be apparent rather than real, depending upon the physio- 
logical condition of the genitalia at the time of examination, and the latter dif- 
ference is so small as to be of doubtful significance. It seems, however, rather 
unlikely that the present material coming from a monkey is identical with the 
flukes from a bird derived from a totally different locality. For this reason, it is 
proposed to credit the two points of morphological difference, noted above, with 
specific value. The name, D. colobusicola, is provisionally proposed for the 
material under consideration, pending the opportunity for making a comparative 
examination with D. macrostomum. 
Family TRICHOSTRONGYLIDAE 
LEIPERIATUS, new genus 
Generic diagnosis. Trichostrongylidae: Dorsal lobe of bursa reduced. Two 
spicules, with relatively massive proportions, ridged, proximal, and with flexible, 
filiform terminal appendages. 
Type species. Leiperiatus hopkeni (Leiper, 1910), new combination. 
LEIPERIATUS HOPKENI (Leiper, 1910), new combination 
Synonym. Nematodirus hopkeni Leiper, 1910. 
Specific diagnosis. Leiperiatus: In the preserved state the worms are of 
a greenish-yellow color. The cuticle is finely striated transversely, and there 
is also a series of a dozen or more longitudinal lines extending the entire length of 
the body. The cuticle of the head is not inflated. The head is about 244 wide 
at the extremity. The mouth cavity is surrounded by four papillae, two sub- 
dorsal and two subventral, and a pair of amphids, laterally. The amphids, 
1 Looss, A.: Notizen zur Helminthologie Aegyptiens. VII. Ueber einige neue Trematoden der 
gyptischen Fauna. Centralbl. f. Bakteriol., etc. (1907). Orig., Jena, Abt. 1, vol. XLIII (pt. 5), pp. 478- 
490. 
2 Odhner, T.: Results of the Swedish Zoological Expedition to Egypt and the White Nile, 1901, 
under the direction of L. A. Jagerskidld. Upsala. (1911). No. 23a. Part 4. Fascioliden. Pp. 1-166. 
