176 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



mesially to join, forming yolk reservoir. Uterus convoluted, filling 

 most of body posterior to vitellaria then passing between and ventrally 

 to vitellaria, to either right or left of ovary, usually between ovary 

 and posterior testis, between testes and dorsal to acetabulum to genital 

 pore. Mature ova few in number, dark brown in color, 34/x to 40/x 

 long by 19fjL to 26/x wide. 



Host. — Pipilo erythrophthalmus (Linnaeus). 



Habitat. — Liver. 



Locality. — North Carolina: Highlands. 



Type specimen.— V.S.l^.M. Helm. Coll. No. 37119. 



Remarks. — Brachylecithum delicatum is described from 12 young, 

 although sexually mature, specimens found in association with other 

 species of Brachylecithum, in the liver of a red-eyed towhee, Pipilo 

 erythrophthahnus^ from Highlands, N. C. The species is very simi- 

 lar to B. seiuricum but differs from that in having a somewhat shorter 

 esophagus, in having the genital pore more posterior, ventrally to the 

 intestinal bifurcation, in the nature and arrangement of the vitellaria, 

 and in the smaller ova. The slightly larger pharynx, somewhat 

 longer ceca, smaller cirrus sac, and the different configuration of the 

 uterus in B. delicatum, are minor differences that may have specific 

 values. 



BRACHYLECITHUM MOOREI, new species 

 FiGUBE 37, OT 



Diagnosis. — Body elongated, dorsoventrally flattened, 3.38 to 4.31 

 mm. long by 0.27 to 0.52 nxm. wide in region of vitellaria, with weakly 

 developed musculature, almost parallel sides which taper slightly 

 toward both extremities. Cuticle thin, without spines or other ob- 

 vious markings. Oral sucker weakly muscular, elongated-oval, 0,18 

 to 0.26 mm. long by 0.17 to 0.23 mm. wide, subterminal to a short 

 liplike projection. Acetabulum 0.17 to 0.28 mm. in diameter, weakly 

 muscular, somewhat protrusible, with center protruded far enough to 

 obliterate lumen, in anterior fourth of body. Eatio of width of oral 

 sucker to acetabulum 1 : 1.12 to 1.21. Pharynx globular, muscular, 

 0.05 to 0.07 mm. in diameter. Esophagus narrow, very thin-walled, 

 straight to slightly wavy, 0.14 to 0.23 mm. long, bifurcating midway 

 between suckers. Ceca narrow, slightly undulating, passing laterally 

 to genital organs alid dorsally to vitellaria, terminating from one- 

 third to one-half of distance from vitellaria to posterior end of body. 

 Excretory pore terminal. Genital pore median, ventral to intestinal 

 bifurcation. Testes large, oval, approximately equal in size, 0.20 to 

 0.35 mm. in diameter, tandem in position, with zones contiguous but 

 not overlapping in relaxed specimens. Zone of anterior testis sep- 

 arated from zone of acetabulum by one to three loops of uterus. Cir- 



