204 RESEARCHIiS IN HELMINTHOLOGV AND PARASITOLOGY. 



Mail}' specimens from two birds. The worms have a yellow color ; 

 those from one bird of a bright lemon yellow, and on pressure 

 exuding a bright deep yellow oil. 



Head with proboscis, 0.7 mm. long ; breadth 0.425 ; length of 

 proboscis 0.2 to 0.3 long, 0.075 wide at middle, and 0.125 at termi- 

 inal disk. Width at commencement of body, 2.2 to 0.225 ; anterior 

 subcampanulate segments o. 1 75 long and 0.3 wide ; others o. 15 long 

 and 0.45 wide ; posterior larger segments 0.375 to 0.625 long and 

 1.25 to 1.5 wide. In a specimen 15 lines long after some of the sub- 

 campanulate segments o. 15 long and 0.45 wide followed others much 

 elongated 0.625 long by 0.15 wide in front and 0.25 wide behind. 

 In the same specimen the posterior broadest segments were 0.625 

 long bj^ 1.5 wide ; and the last few segments were 0.75 long by 

 0.875 wide. In the largest segments the genital apertures could be 

 distinguished in one margin, but neither ova nor penis could be 

 detected. 



Tcenia vexata. — Head armed, transversely quadrate oval, with 

 spherical bothria, variablj' prominent or retracted, summit convex 

 or depressed with a broad immer.sed corona of minute hooks. Neck 

 short or sometimes longer and proportionatelj- narrower ; segments 



^3 



16 



15 17 



Figs. 15, 16, 17. — Tcrnia vexata; 15, anterior part of body; 16, 17, setfineiits 

 from more posterior part of body. 40 diameters. 



of body varying from linear to crateriform and campanulate ; the 

 last segment half oval ; genital apertures marginal, mostly not readily 

 detected. Length from 9 lines and i inch to 2'^ inches. Head 

 0.375 mm. broad ; neck 0.3 broad; widest part of body i to 1.25 

 ram. broad. 



Intestine of pileated woodpecker, Hyloionnis pileatiis. — From six 

 birds. In different specimens the measurements were as follows : 

 Head, 0.325 to 0.5 mm. wide; neck, 0.125 to 0.3 wide; anterior 

 segments linear, 0.0725 long by 0.25 wide ; succeeding, reversed 

 cup-like and variable in proportion of breadth and length according 

 to degree of contraction, 0.175 long by 0.3 wide, or 0.2 long by 



