26 
8. Mature segments measure: 
2.5 to 3 mm. long, 4.5 to 5 mm. broad ( T. solium ) 9 
4 to 4.5 mm. long, 3.5 to 4.5 mm. broad (T. confusa ) 9 
4 to 6 mm. long, 8 to 10 mm. broad ( T. saginata) 9 
2 min. long by 7 mm. broad ( T . africana ) 9 
unknown ; Asiatic Russia ( T. hominis) 3 
9. Ovary divided into 2 portions, right and left of median line 10 
Ovary divided into 3 portions, 2 being on pore side of the segment 
T. solium { p. 37) 
10. Ovaries in distal half of segment 11 
Ovaries fan-shaped , composed of club-shaped tubes centering toward the shell 
gland , and occupying the 2nd and 3rd transverse fourths of segment; Af rica . 
T. africana (p. 32) 
11. Ovarian lobes: 
round; testicles 0.15 mm. in diameter T. saginata (p. 27) 
reniform; testicles 0.089 to 0.096 mm. in diameter T. confusa (p. 44) 
12. Gravid segments (as passed from anus) : 
longer than broad; uterine branches more or less dichotomous 13 
broader than long; 15 to 24 simple lateral uterine branches; Africa 
T. africana (p. 32) 
13. Gravid segments 27 to 35 mm. long, 3.5 to 5 mm. broad; uterus with 14 
to 18 short, thick, lateral branches each side T. confusa (p. 44) 
Gravid segments less than 26 mm. long 14 
14. Gravid segments: 
12 to 20, rarely to 25, mm. long by 4 to 7 mm. broad; uterus with 15 to 
30 slender uterine branches each side of median stem T. saginata (p. 27) 
10 to 12 mm. long, 5 mm. broad; uterus with 7 to 14 short, thick, 
uterine branches each side of median stem T. solium (p. 37) 
10 to 17 mm. long , 4 to 6 mm. broad; uterus with 8 to 10 uterine branches 
each side of median stem T. pisiformis (p. 41) 
8 to 10 mm. long, 5 to 6 mm. broad; uterus with about 12 uterine branches 
each side of median stem T. teniseformis (p. 43) 
15. Cysticercus, known as: 
Cysticereus bovis, lives in cattle T. saginata (p. 27) 
C. celluloste, lives in swine ■ T. solium (p. 37) 
C. pisiformis, lives in rabbits T. pisiformis (p. 41) 
C. fasciolaris, lives in rats and mice T. teniseformis (p. 43) 
unknown T. confusa (p. 44) 
unknown T. africana (p. 32), T. hominis (p. 36) 
Subgenus T JE NIARHYNCHUS® Weinland, 1858. 
• 
Subgexeric diagnosis. — Tsenia (p. 24): Rostellum rudimentary; hooks small and 
disappearing early. Otherwise like Twnia ( Tsenia ) ; see p. 36. 
Type species. — Tsenia saginata (Goeze, 1782). 
Of the 3 species of this subgenus reported for man, only one (namely, 
T. saginata ) is of ant’ importance to physicians practicing in the United 
States. 
a Synonyms. — Pentastomci Yirey, 1823, not Rudolphi, 1819a; Tseniarhynchus Wein- 
land, 1858. 
