NO. 1105. PROCEEDINGS OF THE NATIONAL MUSEUM. 219 



Hooks on stickers arranged in several transverse rows ; hooks of infundibulum very 



small (4 /<) arranged in a single row ; known only in birds Ophryocotyle. 1 



Hooks on suckers arranged in one median set and two lateral sets ; hooks on rostellum 

 provided with long dorsal root and arranged in a single row ; known only in birds. 



Ecliinocotyle* 

 Subfamily f 



34. Anterior extremity of strobila expanded in form of a hammer Fimbriaria.* 



A n terior segments become calci/orm and function as pseudoscolex Idiogenes. 4 



Davainea. 



35. Found in birds ; see Stiles, 1896, 5 p. 45. 



Found in mammals r 36 



36. Genital pores unilateral ; a single egg in each egg capsule 37 



Genital pores generally alternate; strobila attains 85 mm. or more in length by 



3 mm. in breadth; suckers not invaginated; eggs grouped 3 to 15 in each egg 

 capsule. Host: Eastern Jackass hare (Lepus melanotis) and Cottontail rabbit 

 (L. sylvaticus) I), salmoni (p. 198). 



37. Suckers (always?) invaginated; strobila attains 105mm. long by 3 mm. broad. 



Host : Arizona cottontail (L. arizonm) D. retractilis (p. 195). 



Suckers not invaginated 38 



38. Rostellum armed with double row of about 90 hooks, IS /.i long ; strolnln attains 250 



to 300 mm. long, composed of 500 to 600 segments. Host : Man (Homo sapiens). 



D. madagascariensis (p. 194). 



Rostellum large, armed with (?) a single row of numerous minute hooklets ; suckers 

 armed with 8 to 10 rows of hooks. Host: Common Indian Pangolin (Manis peu- 

 tadactyla) D. contorta (p. 195). 



COMPENDIUM OF THE PARASITES ARRANGED ACCORDING TO THEIR 



HOSTS. 



In the following list are given the hosts of the parasites discussed in 

 this paper, so far as they are known to me. I have personally exam- 

 ined the species starred (*) for the hosts under which they are given. 

 For the name of the collector in each case see text. The numbers given 

 with the names of the hosts are those of von Linstow's Compendium 

 and Nachtrag. The geographical distribution refers to the host. One 



'1870, Ophryocotyle, FRIIS, Videnskab. Meddel. fra den Naturhist. Foren. Kjoben- 



havn [aar 1869], 1870, pp. 121-124, pi. I. Type, Ophryocotyle proteus, Friis, 



1870. 



R. Blaiichard gives the date as 1869, Braun gives it 1870. Original not at my dis- 

 posal. For species see Stiles, 1896, Bull. 12, Bureau of Animal Industry, p. 56. 

 2 1891, Echinocotyle, R. BLANCHARD, Bull. Soc. zool. France, IV, p. 423. Type, E. 



rosseteri, R. Blan chard, 1891. 

 3 1802, Fimbriaria, FROLICH, Der Naturforscher, XXIX, pp. 13-14. Type, Tanta 



malleus, Goeze, 1782. 

 1850, Ithynchotwnia, DIESING (as section or subgenus of Tojnia}, Systema Helmiii- 



thum, I, p. 521. Type, Twnia malleus, Goeze, 1782. 

 1892, Epision, LINTON, Proc. U. S. Nat. Mus., XV, p. 100. Type, Epision plicatus, 



Linton, 1892. 

 4 1868, Idiogenes, KRABBE, Videns. Meddel. fra d. Naturhist. Foren. Kjobeuhavn (for 



Aaret 1867), 1868, pp. 122-126. Type, Idiogenes otidis, KRABBE, 1868. 

 6 Stiles, 1896, Report upon the Present Knowledge of the Tapeworms of Poultry, 



Bull. 12, Bureau of Animal Industry, U. S. Department of Agriculture. 





