NO. 1864, 



TWO NEW PARASITIC NEMATODES— BAN80M. 



365 



Female. — Unknown. 



Host. — Goat (Capra Mrcus). 



Location. — Alimentary tract. 



Locality collected. — Pesene, South Africa. 



Type-specimens.— Bureau of Animal Industry Helminthological col- 

 lection, Cat. No. 15980, U.S.N.M., collected August 9, 1908, by C. W. 

 Howard. 



About a dozen specimens of males of this species were present 

 among some nematodes labeled as collected from a goat which had 

 been sent by Mr. Howard to the Bureau of Animal Industry, United 

 States Department of Agricultiu-e, for identification. A careful 

 search was made for females, but 

 none could be found. The other 

 nematodes were Trichostrongy- 

 lus instahilis, Oesophagostomum 

 columhianum, Hsemonchus con- 

 tortus, Strongyloides papillosus, 

 Gaigeria pacJiyscelis , and Buno- 

 stomum, trigonocephalum. 



The other known species of 

 Tricliostrongylus occurring in 

 ruminants are T. colubriformis , 

 T. instahilis (possibly identical 

 wdth the preceding) , T. vitrinus, 

 T. proholurus, T. extenuatus, 

 and T. capricola. T. falculatus 

 is readily distinguished from all 

 of these except T. extenuatus by 

 the small size of the spicules, T. 

 falculatus and T. extenuatus be- 

 ing the only species having spi- 

 cules less than 125 /« in length. 

 Apart from differences which 

 they present in the shape of the 

 spicules, these two species are 

 distinctly different however in 

 that the spicules of T. falculatus are equal in size; whereas the spi- 

 cules of T. extenuatus are unequal, the left spicule being considerably 

 longer than the right. The shape of the gubernaculum of T. falcu- 

 latus is another feature marking this species, as none of the other 

 species has a gubernaculum bent in the same manner. 



TRICHOSTRONGYLUS CALCARATUS, new species. 



Specif c diagnosis. — Tricliostrongylus: Male, 4.7 to 6.6 mm. long. 

 Maximum thickness 100 to 130 ji (at base of bursa). Lateral lobes of 



/??. 



//?./ 



lOOjUL. 



Fig. 3.— TRICHOSTRONGYLUS CALCARATUS. BUESA 

 OF MALE VIEWTD FROM LEFT SIDE. d. T., DORSAL 



ray; e. d., externo-dorsal ray; e. I., externo- 



LATERAL RAY; gub., PORTION OF GUBERNACULUM; 

 I. Sp., PORTION OF LEFT SPICL'LE; I. V., LATEEO- 

 VENTRAL ray; TO. Z., medio-lateraleay; p. I., POS- 

 TERO-LATERAL RAY; V. V., VENTRO-VENTRAL RAY. 



