194 RESEARCHES IX HELMIXTHOLOGY AND PARASITOLOGY. 



Large peual spiculuni, 2.5 to 3 mm. long ; shorter one 0.18 to 0.22 

 mm. ; caudal bursa, 0.28 long; width of aUe, 0.036 mm. (Drawing.) 



From the subcutaneous connective tissue of the neck and mandi- 

 ble of the Short-eared Owl, Asia occipitrinus {Strix brachyohis). 



This appears to be a much smaller and different species from the 

 filaria attenuata Rud., found in the same bird and others of the 

 order in Europe. Dujardiu (Helminthes, 51) gives as the size of 

 the latter 250 to 308 mm. for the female, and 136 to 148 mm. for 

 the male, with i mm. for the longer penal speculum. Schneider 

 gives (Monog. Nemat., 89) for F. atteuuata, from Fa/co peregriujts, 

 330 mm. for the female, and 115 mm. for the male, the caudal bursa 

 of which he represents as circular. He remarks that the Filaria 

 of Strix and of Ceais glandarius, referred by Rudolphi to F. atten- 

 uata, is a different species, but does not describe it, for want of per- 

 fect specimens. Obtained in Chester county, Pennsylvania, Decem- 

 ber. 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. 



Ascaris tulura. — Bod^^ 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 con- 

 ical ; as broad at base as the length. Male : caudal extremity ta- 

 pering, slightly incurved, with a row on each side of minute papillae 

 (20 or more?) ; tail short, conical, ending in a spheroidal knob. 

 (Drawing.) 



One female ; length 125 mm. ; width of cephalic extremity a short 

 distance from the end, 0.375 ; at middle of bod)^ 1.25 ; near the 

 tail, I 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 Red-shouldered Hawk, Biitco li?ieatus. 



This worm approximates the Ascaris dcpressa Rud., observed in 

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

 (Syst. Helm., 156) describes the tail of the male of the former as 

 shortly mucronate and papillose beneath, and Schneider (Monog. 

 Nemat., 41) 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 clo.sely spiral ; head with prominent lips. Female : 

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



