74 ILLINOIS BIOLOGICAL MONOGRAPHS [424 



sides of proglottid slight. Number of testes about 200. 

 With prostate cells on vas deferens. Cirrus pouch 90;u, 

 long. Host, Ptilopus sp., Sumatra. (See Fuhrmann, 1902.) 



M. columbae 



46. Uteri of two sides never united. Testes about 140. No prostate 



cells on vas deferens. Cirrus pouch 300 to 450/u, long. 

 Hosts, Ptilonopus sp., Lorius erythrothorax, Trichoglossus 

 novaehollandiae, Cyclopsittacus suavissimus, and other par- 

 rots, New Guinea and Sumatra. (See Fuhrmann, 1902; 



also, Diamare, 1900 and 1901.) M. carrinoi 



Uteri of two sides becoming connected very early, anteriorly. 

 Number of testes, about 100. Host, Chrysotis amazonica, 

 South America. (See Fuhrmann, 1902.) _„ M. ambigua 



Uteri of two sides becoming connected distally. Hosts, 4 species of 

 Khamphastos. Description poor. (See Fuhrmann, 1904.) 



M . variabilis 



47. With interproglottidal glands, which are linear, and are not 



grouped around blind sacs (very indistinct in M. bene- 

 deni. ) Planissima-group 48 



With interproglottidal glands, which are grouped around blind 

 sacs. Expansa-grouip 49 



No interproglottidal glands. Alba-group 50 



48. Length, 1 to 2 m. Ripe segments 12 to 26 mm. broad, and 1 



to 1.75 mm. long. Interproglottidal glands large, distinct. 

 Hosts, Bos taurus and Ovis aries. (See Stiles & Hassall, 

 and others.) M. planissima 



Length, 4 m. Ripe segments 12 mm. broad by 3 mm. long. 

 Interproglottidal glands indistinct (absent?). Hosts, Bos 

 taurus and Ovis aries. Better study needed. (See Stiles 

 & Hassall, 1893.) M. benedeni 



About 0.66 m. long. Largest segments 8 mm. broad by L5 

 mm. long. Testes in a quadrangle. Interproglottidal 

 glands small. Host, Ovis aries. Better study needed. (See 

 Stiles & Hassall, 1893.) M. neumanni 



49. Length, 4 to 5 m. Testes in mature proglottids usually in a 



quadrangle, rarely in two triangles. Hosts, Bos taurus 

 and Ovis aries. See Stiles and Hassall, 1893 ; Tower, 1900 ; 



present paper, and others.) M. expansa 



Length, about 1 m. Testes less numerous and smaller than 

 in ftl. expansa. Host, Coassus sp., Trinidad, South Amer- 

 ica. Poorly known. (See Stiles and Hassall, 1893.) 



M. oblongiceps 





