HELMINTH PARASITES OF BIRDS — DENTON AND BYRD 185 



vesicles in the posterior half of body ; vesicles containing highly re- 

 fractile granules. 



Additional hosts. — Oassidix mexicanus prosopidicola Lowery and 

 Piranga olivacea (Gmelin). 



Habitat.— Gall bladder. 



Localities.— T-EXAS, Eagle Lake ; Virginia, Mountain Lake. 



Material. — A specimen from the mesquite grackle has been deposited 

 in the United States National Museum, Helm. Coll. No. 36746. 



Remarks. — The above description of Lubens lubens is based on four 

 mature specimens from the gall bladders of two of nine mesquite 

 grackles, Cassidixmexicanus frosopidicola., collected at Eagle Lake, 

 Tex. The infected birds contained one and three worms, respectively, 

 and each was infected with another species of dicrocoeliid trematode. 

 These specimens fit perfectly into the present concept of L. lubens.^ 

 which was recently expanded by Travassos (1944) to include four 

 former species and specimens from 27 different hosts. This species 

 has not heretofore been reported from North America or any place 

 outside of Brazil. 



In addition to the worms from the mesquite grackles, a single mature 

 specimen of this species was found in the gall bladder of a scarlet 

 tanager, Piranga olivacea^ collected at Mountain Lake, Va. This 

 specimen (fig. 38, /), although it is sexually mature and has the 

 uterus distended with eggs, measures only 2.45 mm. long by 1.51 mm. 

 wide. The oral sucker measures 0.27 mm. long by 0.39 mm. wide. 

 The acetabulum 0.29 mm. long by 0.39 mm. wide. Ratio of oral 

 sucker to acetabulum 1 : 1. The testes measure 0.21 mm. and 0.24 mm. 

 in greatest diameter. The ovary is 0.18 mm. long by 0.27 mm. wide. 

 The vitellaria extend 0.95 mm. along the sides of the body. The cirrus 

 pouch measures 0.16 mm. long by 0.08 mm. wide. The ova are 40/* to 

 43/x long by 23/x to 24/* wide. 



Genus CONSPICUUM Bhalerao, 1936 



CONSPICUUM ICTERIDORUM, new species 



Figure 39, a, h 



Diagnosis. — Body fairly thick and muscular, elongated oval, taper^ 

 ing to posterior end, 2.20 to 5.97 mm. long by 0.70 to 1.97 mm. wide, 

 widest in region between testes and ovary. Cuticle thick, without 

 spines, smooth or with fine transverse wrinkles when slightly con- 

 tracted. An undetermined number of small retractile sensory papillae 

 visible on lateral margins of anterior half of body; papillae much 

 more numerous on the inconspicuous dorsal liplike projection and 

 along lateral margins of oral sucker. Oral sucker strongly musctilar, 

 subterminal, 0.20 to 0.58 mm. in diameter. Acetabulum large and 

 muscular, with deep cup -shaped lumen, situated at junction of ante- 



