u 



1887.] NATURAL SCIENCES OF PHILADELPHIA. 21 



Obtained in Chester Co., Pa., December, 1886, by Dr. B. H. 

 Warren. 



Three specimens, females, two inches in length, from the orbit 

 of the Hen-hawk, Buteo borealis, in the collection of the Army 

 Medical Museum, appear to belong to this species. 

 Ascarls tulura. 



Body cylindrical, most narrowed and tapering anteriorly, of a 

 pinkish color; mouth trilobed, the lobes together nearly as wide 

 as the head. Female: caudal extremity nearly as thick as the 

 middle of the body, straight; tail short, obtusely conical, as 

 broad at base as the length. Male: caudal 

 extremity tapering, slightly incurved, with a 

 row on each side of minute papillse (20 or 

 more?); tail short, conical, ending in a 

 spheroidal knob. 



One female; length 125 mm.; width of Fig. z.-Caudai extremity 

 cephalic extremity a short distance from ^ female; 3. Of male- 



-111 f>i Highly magnified. 



the end, O'o/o; at middle 01 body, 1'25; 



near the tail, 1 mm. wide; tail, 0'25 long. One male; length 90 



mm.; width at middle, 0"75; tail, 0*25 long; rounded end, 0'125 



thick. 



From the ventriculus of the Ked-shouldered Hawk, Buteo 

 lineatus. 



This worm apjDroximates the Ascaris depressa Rud., observed 

 in many rapacious birds, but appears to be a different species. 

 Diesing^ describes the tail of the male of the former as shortly 

 mucronate and papillose beneath, and Schneider ^ figures it 

 according to that description. 



Specimens obtained in Chester Co., Pa., December, 1886, by 

 Dr. B. H. Warren. 



Ascaris sulcata Rudolphi. 



Body anteriorly attenuated; posteriorly more or less closely 

 spiral; head with prominent lips. Female: tail conical, recurved 

 from the anus, ending in a minute mucro. Male: tail conical, 

 shortly mucronate, bialate, with a row on each side of four or 

 five nipple-like papillte. 



Female, up to 25 mm. long by 0"5 wide at middle; tail, 0"25 

 long. Male, 15 mm. long by 0'3 wide at middle, 



^ Syst. Helm., 156. ^ Monog. Nemat., 41. 



