180 bulletin: museum of comparative zoology. 



Otostigmus tibialis Brolemann. 



Rev. Mus. Paulista, 1901, 5, p. 39, fig. 4, 5. 



Otostigmus caudatus tibialis Kraepelin, Revis. Scolop., 1903, p. 132, fig. 73, 74. 



Otostig?7}us caiidatus Brolemann, Cat. Myr. Bresil, 1909, p. 13. 



Localities. — State of Sao Paulo: Sao Paulo, Piquete. Alto da Serra, 

 Santos; State of Parana. 



Trematophycus Peters. 



Reise Mozambique, 1862, 5, p. 519. 



Branchiostoma Newport {norn. preocc.) Trans. Linn. soc. London, 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; KraepeUn 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. 



Kep to Species. 



a. At least some of the dorsal plates with the paired submedian 

 sulci crossing entire lengtlx.of plate. 



b. Only the twenty-first dorsal plate margined; prefemur of 

 anal leg with one (or two) ventral spines. 



T. nudus (SevrpoTt). 

 bb. Some of the dorsal plates cephalad of the twenty-first also 

 distinctly margined. 



c. Prefemur of the anal legs wholly unarmed; process of 

 coxopleurae short, subtriangular, without lateral spines. 



T. ceteris (Humbert and Saussure). 

 cc. 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 (Xe^"port). 

 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). 



