HELMINTH PARASITES OF BIRDS — DENTON AND BYRD 191 



capillary tubules. Of the anterior pair of capillary tubules, one 

 extends straight anteriorly along the oral sucker and the other turns 

 ventrally at right angles along the posterior wall of the sucker. 

 The middle pair of capillaries arises at approximately the posterior 

 level of the cirrus sac; one passes ventrally in an anteromedial di- 

 rection, the other dorsally and medially toward the posterior end of 

 the cirrus sac. The posterior pair of capillaries arises just a short 

 distance anterior to the junction of the anterior and posterior main 

 tubules ; one passes anteromedially toward the anterior margin of the 

 acetabulum while the other one passes medially toward the center of 

 the acetabulum. The origin and number of capillaries arising from 

 the posterior main collecting tubules could not be determined. How- 

 ever, it seems logical that three pairs of capillaries also arise from 

 each of the posterior main collecting tubules, as described for other 

 species of Dicrocoeliinae, and that the complete system is very similar 

 to that described for Conspicuum icteridorum. 



Zonorchis alveyi was described originally from specimens from the 

 gall bladder of the slate-colored junco, J%inco htjemalis (Linnaeus), 

 from the vicinities of Lafayette and Greencastle, Ind. The present 

 paper reports specimens from the gall bladder of the red-eyed towhee, 

 Pipilo erythrophthalmus (Linnaeus), from Mountain Lake, Va., 

 Highlands, N. C, and Athens, Ga. ; from the white-throated sparrow, 

 Zonotrichia alMcollis (Gmelin), from Houston, Tex.; from a white- 

 crowned sparrow, Zonotrichia leucophrys (Forster), from Athens, 

 Ga.; and from the swamp sparrow, Melospiza georgiana (Latham), 

 and a song sparrow, Melospiza nielodia (Wilson), from Augusta, Ga. 

 Individual birds harbored one to eight worms, four being the average 

 per bird. The red-eyed towhee has been found infected more often 

 than the other hosts and harbored the largest number of worms. Two 

 specimens. No. 36738 from the red-eyed towhee and No. 36739 from the 

 white-throated sparrow, have been deposited in the helminthological 

 collection of the United States National Museum. 



We do not agree with Martin and Gee (1949) in assigning this form 

 to the genus Eurytremu. The shape of the body, the location of the 

 genital pore (ventral to the pharynx), the nature and extent of the 

 vitellaria, together with the fact that the acetabulum is larger than 

 the oral sucker (about 1.4:1), definitely indicate affinities with mem- 

 bers of the genus Zonorchis Travassos, 1944. The proper designa- 

 tion of the species, then, is Zonorchis alveyi (Martin and Gee, 1949), 

 new combination. In describing Z. alveyi {=^ Eurytrema alveyi) the 

 authors compared it only with Concinnum ludovicianae (Petri, 1942) 

 Travassos, 1944, a form to which it has only a superficial resemblance. 

 From other species of the genus Zonorchis, with which it appears to be 

 more closely related than to species of the genus Concinnu?n, Z. alveyi 



