HELMINTH PARASITES OF BIRDS — DENTON AND BYRD 177 



rus sac elongated-oval, 0.20 to 0.31 mm. long by 0.09 to 0,14 mm. wide, 

 containing convoluted seminal vesicle, ejaculatory duct and eversible 

 cirrus. Cirrus sac situated so that caudal extremity reaches to or 

 slightly beyond anterior margin of acetabulum. Ovary round to 

 transversely oval in shape, smaller than testes, 0.13 to 0.19 mm. in 

 transverse diameter, on either right or left side of body, separated 

 from posterior testis by one to three loops of uterus. Seminal re- 

 ceptacle small, globular, contiguous to caudal margin of ovary. Meh- 

 lis' gland diffuse, medially to seminal receptacle. Laurer's canal not 

 observed. Vitellaria consisting of 6 to 14 large follicles on each side 

 of body, with more follicles on side of body opposite ovary, located 

 just posterior to seminal receptacle. Uterus greatly convoluted, fill- 

 ing most of body posterior to ovary, ascending to genital pore by one 

 of three courses : (1) Passing to either right or left of ovary, between 

 ovary and posterior testis, between testes, then anteriorly by a wavy 

 course; (2) passing to either right or left of both ovary and posterior 

 testis, between testes, then anteriorly by wavy course; or (3) passing 

 to either right or left of all three gonads, then anteriorly by wavy 

 course. Mature ova dark brown, 36/* to 44/* long by 23]u, to 29/x wide. 



Host. — Bilbo virginianus (Gmelin). 



Habitat. — Liver. 



Locality. — United States (probably Texas). 



Type specimen.— {J.^.l^.M.. Helm. Coll. No. 37120. Additional 

 specimen No. 37121. 



Remarhs. — Brachylecithum moorei is described from about 50 speci- 

 mens taken from the liver of a great horned owl. Bubo virginianus. 

 The host died while in the Zoological Gardens, Houston, Tex. 

 Although the bird probably came from the vicinity of Houston, the 

 exact locality from which it was taken could not be determined. It 

 appears to be more closely related to B. americanuTn Denton, 1945, 

 than to the other members of the genus. From this species it is dis- 

 tinguished by the longer ceca, oval instead of lobed testes, and a larger 

 cirrus sac. 



BRACHYLECITHUM AMERICANUM Denton, 1945 



FiQUKE 38, a 



Brachylecithum americanuyn Denton, Journ. Parasitol., vol, 31, pp. 131-140, 

 figs, 1-8, 1 pi,, 1945. 



As recently as September 1948, 18 specimens of a form identifiable 

 as Brachylecithum americanum Denton, 1945, were removed from the 

 liver of an immature red-shouldered hawk, Buteo lineatits (Gmelin), 

 from Athens, Ga. This material agrees remarkably well with that 

 from crows, Gorvus brachyrhynchos Brehm, from the same locality in 



