HELMINTH PARASITES OF BIRDS — DENTON AND BYRD 167 



posteromedial to seminal receptacle. Laurer's canal not observed. 

 Vitellaria consisting of 7 to 14 large oval to rounded, discrete follicles 

 on each side of body, tending to meet ventrally at anterior limits and 

 occupying zone immediately posterior to Mehlis' gland. Uterus much 

 convoluted, filling most of body posterior to vitellaria, then passing 

 forward ventrally to vitellaria and ovary (in two specimens the uterus 

 passes dorsally to the ovary) by undulating course, dorsally between 

 ovary and posterior testis, dorsally to both testes and acetabulum to 

 genital pore. Mature ova dark brown, fully embryonated when ovi- 

 posited, 44/A to 67 fj. long by 23/x to 33/x, wide. 



Additional host. — Pipilo erythrophthahnus (Linnaeus). 



Habitat. — Liver and bile ducts. 



Localities. — Virginia: Mountain Lake; North Carolina: High- 

 lands. 



Material. — Two specimens have been deposited in the helmintho- 

 logical collection of the U. S. National Museum, No. 37115. 



Remarks. — Brachylecithwrn rarmn is described here from 25 mature 

 specimens from the liver of the red-eyed towhee, Pipilo erythroph- 

 thalmus., from Mountain Lake, Va., and Highlands, N. C. The 

 material in the present collection agrees very closely with that de- 

 scribed by Travassos (1917, 1944) except for the size of the pharynx, 

 which is slightly larger in our material. 



BRACHYLECITHUM TUBERCULATUM, new species 



Figure 35, f-h 



Diagnosis. — Body of mature specimen elongated-cylindrical, with 

 rounded anterior and tapering posterior ends, 1.93 to 3.43 mm. long 

 by 0.17 to 0.20 mm. wide in region of testes. Cuticle aspinose, with 

 numerous close-set conical tuberculations irregularly distributed over 

 body except in region of oral sucker Oral sucker subterminal, weakly 

 muscular, elongated-oval in shape, 0.11 to 0.18 mm. long by 0.10 to 0.13 

 mm. wide, with oral opening directed ventrally. Acetabulum weakly 

 muscular, 012 to 0.15 mm. in diameter, with shallow saucerlike lumen 

 (fig. 35, g) in living and contracted specimens, or with center pro- 

 truded (fig. 35, A), obliterating lumen in most fixed specimens, located 

 in anterior fifth of body. Ratio of width of oral sucl^ier to acetabulum 

 1 : 1.18 to 1 : 1.37. Prepharynx absent. Pharynx muscular, longer 

 than wide, 0.03 to 0.05 mm. long by 0.03 to 0.04 mm. wide. Esophagus 

 very thin-walled, slender, straight to slightly wavy, bifurcating from 

 one-half to two-thirds distance from oral sucker to acetabulum. Ceca 

 narrow, very thin- walled (visible only in sectioned specimens) , slightly 

 undulating, passing dorsally to acetabulum, dorsally to margins of 

 testes and dorsally to vitellaria, terminating unevenly j ust posterior to 



