(;27 



T. sphenocephala Rud.. islii and crassula Ku«l.. 1819, are evi- 

 dently the earliest specific names to which we can refer with 

 certainty, although the earlier names may be looked upon as 

 probable but unidentifiable synonyims. Axicording' to page- 

 priority T. sphenocephala should stand, but as that is an un- 

 certain earlier synonym, and as Railliet has already used 

 crassula, I retain the latter name tor the present. 



There are certain other species which must be con 

 sidered in connection with this genus, but most ol 

 which are but little known at present. The followinj; 

 characters are taken from Krabbe (1800) and P.hiii 

 chard (1S91, pp. 434-438): 



A. Avian parasites: 



Davainea struthionis (Parona. 1SS5)— Syn. 1810. Taenia 

 struthio cameli Rudolphi, nomen nudum; 1819. T. struthionis 

 Rudolphi, nomen nudum; 1819, T. struthionis Rudolphi, nomen 

 nudum; 1885, T. struthionis Parona; 1893, T. (Davainea) 

 struthionis von Linstow.) Parona's description of this para- 

 site from ostriches is not accessible to me. 



Davainea insignis (Steudener, 1877) R. Bl., 1891 (Syn. 1877. 

 Taenia insignis Studener). lOOmm to ISOnim long; rostellum 

 armed with double crown of minute hooks; suckers also armed 

 with gyriniform hooks, smaller than those of the rostellum, 

 points directed inward; host: Carpophaga oceanica. (Original 

 not at my disposal, I quote from R. Blanchard, 1891. pp. 434- 

 435.) 



Davainea australis (Krabbe, 1869) R. Bl.. 1891 (Syn. 1869. 

 Taenia australis Krabbe). Strobila 400mm long, 1.2mm broad; 

 rostellum with a double row of 340-360 hooks 12 /t to 1A f long: 

 suckers with hooks, 5 /^ to 11 // long; genital pores unilateral; 

 host: Dromaius Novae-Hollandiae. 



Davainea urogalli (Modeer, 1790) R. Bl., 1891. (Syn. after 

 Krabbe 1869, p. 344; 1S46, Taenia tumens Mehlis; 1850, T mi- 

 crops). Strobila 300mm long; rostellum with double crown of 

 ca. 100 hooks 10-11 /i long; genital pores unilateral; hosts: 

 Tetrao urogallus; Tetrao tetrix; Cacabls saxatllis; Centrocerus 

 urophasianus; Tetraogallus hlmalayanus. 



Davainea frontina (Dujardin, 1845) R. Bl., 1891. (Syn. after 

 Krabbe, 1869: 1810, Taenia crateriformis Rudolphi, pars; 1845. 

 T. frontina Dujardin.) Strobila 100mm long by imm broad; 

 head 380 /i broad, rostellum 126 /i surrounded by a double crown 

 of about 300 hooks S /i long: suckers 140 ft in diameter, armed 



