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Filarlid Parasites of Ruminants 
the most part been recorded on single occasions only and the majority are 
very incompletely described, so much so as to be practically unrecognisable. 
T he material at my disposal was found to consist of four species, two of 
these are described as new, the others referred to the species S. labiato-papillosa 
(Aless.) and S. digitata (v. Linst.). Whilst describing the two new forms I have 
considered it advisable to add a brief account of the latter species also, since 
even the commoner parasite of Domestic Cattle is very shortly described in 
the text-books and very few records of the measurements of the various 
organs seem available. I have also added a short diagnosis of the genus 
Setaria. 
Genus Setaria Viborg 1795 (non Oken 1815). 
Hamularia Treutler 1795, Stiles 1907. 
Filaria auct. p.p. 
Generic diagnosis. Filariidae: Body cylindrical, filiform, considerably 
attenuated at the posterior extremity in both sexes. Cuticle finely striated 
transversely. Mouth surrounded by a chitinous peribuccal ring, notched 
laterally and usually also dorso-ventrally so as to give the impression of two 
or four projecting teeth. Four submedian head-papillae always present, a 
pair of lateral papillae probably always occur as well but are frequently diffi¬ 
cult to see. Oesophagus consisting of two parts: a short, narrow anterior 
(“ vestibule” of some authors) and a much longer and thicker posterior region. 
Male smaller than the female, its attenuated caudal extremity ending in 
a close spiral. Preanal and postanal papillae present as well as in the majority 
of species a pair of small lateral appendices close to the posterior extremity. 
Spicules very unequal, the longer consisting of two parts the posterior of which 
is largely membranous, the shorter curved. 
Female with caudal region coiled in a loose spiral and bearing a pair of 
lateral appendices close to the extremity. Vulva near the anterior end of the 
body. Eggs thin-shelled. Ovoviviparous. 
Parasitic in the peritoneal cavities of Mammals. 
Type Species: Setaria equina (Abildgaard 1789), Railliet and Henry, 1911. 
Setaria labiato-papillosa (Aless. 1838). 
This common parasite of Ruminants is represented in my material by 
specimens from Domestic Cattle and the Bush-Buck in British East Africa 
and from the Stag (Cervus hippelaphus) in Mauritius. 
Specific diagnosis. Setaria: Body tapering gradually to the anterior 
extremity. Head rounded, not separated from the remainder of the body. 
Peribuccal ring prominent, much elongated dorso-ventrally and deeply 
notched laterally in such a way as to give the appearance in a side view 
(Text-fig. 1 A) of strong dorsal and ventral teeth separated by a wide depres¬ 
sion from the centre of which arises a semi-circular lip-like elevation. Each 
tooth is in its turn indented so as to form two cusps, visible when the head is 
