180 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
OTOSTIGMUS TIBIALIS Brélemann. 
Rev. Mus. Paulista, 1901, 5, p. 39, fig. 4, 5. 
Otostigmus caudatus tibialis Kraepelin, Revis. Scolop., 1903, p. 132, fig. 73, 74. 
Otostigmus caudatus Brélemann, Cat. Myr. Brésil, 1909, p. 13. 
Localities.— State of Sao Paulo: Sao Paulo, Piquete, Alto da Sérra, 
Santos; State of Parana. 
TREMATOPHYCUS Peters. 
Reise Mozambique, 1862, 5, p. 519. 
Branchiostoma Newport (nom. preocc.) Trans. Linn. soc. Londen, 1844, 19, 
p. 411; Meinert, Proc. Amer. philos. soc., 1886, 23, p. 182. 
Ptychotrema Peters (nom. preocc.), Monatsb. Berl. akad., 1855, p. 82. 
Rhysida Wood, Journ. Acad. nat. sci. Phil., 1862, ser. 2, 5, p. 40; Pocock, Ann. 
mag. nat. hist., 1891, ser. 6, 7, p. 58; Kraepelin Revis. Scolop., 1903, p. 
139; Verhoeff, Bronn’s Thierreich, 1907, 5, p. 57. 
Ethmophora Pocock, Ann. mag. nat. hist., 1891, ser. 6, 7, p. 58. 
Of this genus three species are at present known from Brazil, and a 
fourth is practically certain to occur there and is accordingly intro- 
duced into the following key. 
Key to Spectes. 
a. At least some of the dorsal plates with the paired submedian 
sulci crossing entire length of plate. | 
b. Only the twenty-first dorsal plate margined; prefemur of 
anal leg with one (or two) ventral spines. 
i T. nudus (Newport). 
bb. Some of the dorsal plates cephalad of the twenty-first also 
distinctly margined. 
ce. Prefemur of the anal legs wholly unarmed; process of 
coxopleurae short, subtriangular, without lateral spines. 
T. celeris (Humbert and Saussure). 
ec. Prefemur of anal legs armed with eight to thirteen spines; 
process of anal coxopleurae long, with one or two lateral 
spines in addition to the terminal ones. 
T. longipes (Newport). 
aa. None of the dorsal plates with sulci crossing its entire length, 
these appearing at most as short traces at ends of plates. 
Prefemur of anal legs wholly unspined. 
T. brasiliensis (Kraepelin). 
