AKT. 20 NEW SPECIES OF TRICHOSTKONGYLID WORM SCHWARTZ 3 



the genus : Cooperia alata Railliet and Henry, 1909; Cooperia macieli 

 (Travassos, 1915) ; Cooperia elegans Travassos, 1921; Cooperia falsa 

 Travassos, 1921} Cooperia harked (Stodter, 1901) ; Cooperia hisonis 

 Cram, 1925; and CoopeAa fuellehorni Hung, 192G. 



So far as concerns Cooperia alata Railliet and Hcnrj^, 1909, from 

 the mtestine of a macacus monkey, the specific description, Avhich is 

 based on a male, is very brief and is unaccompanied by illustrations. 

 Railliet and Henry say that the cuticle of the body has about 16 

 longitudinal lines, and this morphological feature is characteristic 

 of the genus Cooperia. However, they also say that C. alata pos- 

 sesses a gubernaculum, and this structure is not known to be present 

 in the four species referred to this genus by Ransom in 1907 nor in 

 any other species that definitely belongs to it. 



C oopena macieli (Travassos, 1915) is described from the stomach 

 of Damjpus novemcinctus { = Tatus novemeinctus) and is well ilhis- 

 trated in Travassos's paper on the family Trichostrongylidae pub- 

 lished in 1921. Although the latero-ventral ray is larger than the 

 ventro-ventral ray as shown in his illustrations and described in his 

 text, whereas in other species of the genus the ventro-ventral ray 

 is much more slender than the latero-ventral ray, the species in 

 question has the primary characters of the genus Cooperia. 



Cooperia elegans Travassos, 1921, from the small intestine of 

 Saiinins sciurea, and Coopei^ falsa Travassos, 1921, from the 

 stomach of Cahassus unicinctus are described briefly without illus- 

 trations, and the descriptions contain no characters on the basis of 

 which the worms can be assigned with certainty to the genus 

 Cooperia. For the present, at least, these two species must be 

 regarded as having doubtful generic affinities, and until more de- 

 tailed descriptions with figures are published the writer considers 

 that there is a lack of evidence on which to definitely assign these 

 species to the genus Cooperia. 



Cooperia harkeri Stodter, 1901, from cattle, is placed in this genus 

 by Fiebiger (1923). Harker's (1893) figure shows that tl e species 

 in question does not belong to the genus Cooperia. In tlie opinion 

 of Ransom (1911), this species is identical with Ostertagia ostertagi. 



Cooperia fuellehorni Hung, 1926, from Kohus ellipsij^rymnus is 

 very closeW related to Cooperia cu/ticei, as noted by Hung, bis differ- 

 entiating characters not being sufficient, in the opinion of *^he writer, 

 to wai-rant the erection of new species, and in this paper C. fi<eUehorni 

 is regarded as a synonym of C. ourticei. 



The following key will serve to differentiate the known species of 

 the genus Cooperia and to indicate the position of Cooperia. nodulosa 

 in the genus : 



