MALLOPHAGA FROM AFRICAN HOSTS. 147 
Linognathus forficula, sp. n. (Pl. IV, figs. 2, 4). 
Many females from a reed-buck (Cervicapra arundinum), George’s, Marimba 
District, Nyasaland (Dr. E. H. Allon Pash). 
This curious new Linognathus is readily distinguished from any other species, 
so far included in the genus, by the conspicuous forceps-like pair of curved, 
pointed, posteriorly projecting, abdominal processes of the female. It is most 
nearly resembled by L. brevicomis and L. tibialis from antelopes, each of which 
has an emarginated posterior abdominal border, producing two short obtuse 
projecting processes, but these processes are not of the forceps-like character 
which is so pronounced in the new species. 
FemaLe.—Length, 2°34 mm.; width,°74 mm. A striking species with plump 
whitish long abdomen and pale brown short thorax and head. Head with large 
thick-jointed brown antenne inserted in front of the middle, and with anterior 
end of head strongly chitinized. But few short hairs on dorsal surface of head 
and one pair of soft longish ones arising near the postero-lateral margins, which 
margins are bordered with a strongly chitinized dark brown band. Thorax short, 
broad, with diverging lateral margins and bearing one pair of strong longish hairs 
and several minute hairs on the dorsal surface. [intire thorax brownish, because 
of strong broad diagonal bands that practically cover the dorsal surface. Legs 
brown, except at sutures which are whitish. Abdomen a little more than twice 
as long as wide, whitish, except last segment which is brown, with numerous 
rather longish hairs arranged segmentally in short transverse series on the dorsal 
surface, each series only extending across the median half of the segment. Two 
long conspicuous hairs in each postero-lateral angle of the two penultimate 
segments, and many shorter hairs on the lateral margins of the last forcipated 
segment. The forceps is made by a deep emargination of the posterior border 
of the last segment, which emargination, 7c, the inner margin of the forceps, is 
also lined with short hairs. On the ventral aspect of the posterior end of the 
abdomen there is a curious, bluntly two-pointed process (PI. LV, fig. 4). 
MALLOPHAGA, 
Trichochetes climax, Nitzsch. 
Numerous specimens from goats, Ilesha, Southern Nigeria, W. Africa 
(J. J. Simpson). 
Nirmus fuscus, Nitzsch. 
Several specimens from an unknown species of owl, Malachal, Egyptian Sudan 
(H. H. King). 
Nirmus varius, Nitzsch (Plate J, figs. 5, 5a). 
One female from a white-necked raven (Corvultur albicollis), Oshogbo, 
Southern Nigeria (J. J. Simpson), and an immature specimen from a starling, 
Malachal, Egyptian Sudan (/7. H. King). As Piaget has figured only the head 
of this striking form we have given an illustration of the whole insect, showing 
the genital blotch (Pl. V, fig. 5a). 
