ART. 18 TWO NEW LUNGWORMS FROM RUMINANTS DIKMANS 6 



PROTOSTRONGYLUS MACROTIS, new species 

 Plate 2 



Specific diagnosis. — Protostrongylus : Male: 26 mm. long and 165^ 

 wide. Immediately anterior to the bursa the body narrows to about 

 95/x to 100/i. The esophagus is 440ja long and 7T/a wide at its base. 

 The spicules are 200//, long. The spicule sheath extends from the 

 proximal end of the spicule to within about 10/i. to 15/a from the 

 distal end. The telamon is usually situated immediately behind the 

 terminal portion of the spicules and is difficult to study. In its 

 general pattern it resembles similar structures figured for other 

 members of this genus. It terminates in two sharply curved, acute 

 points. There is no gubernaculum. The bursa when spread out is 

 180/A to lOOja wide and about 160/^ long. The ventro-ventral ray 

 is 25/x to 27/x long, the ventro-lateral 3T/a, the externo-lateral 35|u,, 

 the medio-lateral 46/a, the postero-lateral 44/x, and the externo-dorsal 

 38.5/:a to 42ja. Chitinous arcs are present. 



Female: 45 mm. to 47 mm. long by 190ya to 200/a wide in the region 

 of the vulva. The two uteri unite to form a vagina, which is 575/x 

 to 600/x long. The distance from the vulva to the anus is 250 to 

 260yLi, and from anus to the tip of the tail 110/:* to 120/x. The tail 

 ends in a bluntly rounded point. The eggs in the terminal portion 

 of the uteri are from 57/i. to 65/i long by 38.5/a wide. 



Host. — Mule deer {Odoco Ileus, heniionus hemionvs). 



Location. — Bronchi. 



Locality. — Yellowstone Park, Wyo. 



Type specimen.— \J.S.'^.'M. Helm. Coll. No. 30406. 



A NOTE ON THE LUNGWORMS OF SHEEP IN THE UNITED STATES 



Curtice, in 1890, records the occurrence of two lungworms in sheep 

 in the United States. He named one " the hair lungworm, Stroa- 

 gylus ovis pulmonaUs Diesing " and the other " the thread lung- 

 worm, Strongylus fila.ria Rud." Hall considered Strongylus ovis 

 pulmonalis as identical with Synthetocaulus mfescems and placed 

 Curtice's name for the hair lungworm in synonymy. K. cursory 

 examination of some of the material in the United States National 

 Museum collection labeled Synthetocwulus t^fescens has shown that 

 part of the material so labeled is in reality Muellerius capUlaris 

 Cameron, 1927. Examination of material macroscopically similar 

 to that described by Curtice, obtained from a sheep at Washing- 

 ton, D. C, also demonstrated that the worms present were Muellerius 

 capillaris. Nematodes found in the bronchi of the same animal 



