172 bulletin: museum of comparative zoology. 



dd. First nineteen pairs of legs with two tarsal spines; 

 twentieth legs with no tarsal spine; dorsal plates 

 without such conspicuous keels or ridges. 



0. goeldi Brolemann. 



cc. Legs of only the first two to the first six pairs with two 



tarsal spines or all with but a single tarsal spine. 



d. Last dorsal plate in the male ending in a process as 



long as the plate proper, in the female caudally acutely 



angular or at least rectangular; ventral plates wholly 



without furrows or pits 0. caudatus Brolemann. 



dd. Last dorsal plate in both sexes simply bowed out 



caudad, not acutely angular; ventral plates with 



distinct depressions or pits. 



e. Ventral plates from the second to the twentieth 



with distinct sulci reaching to beginning of caudal 



third or fourth of length; first six pairs of legs with 



two tarsal spines; only the first two articles of 



antennae glabrous 0. amazonae, sp. nov. 



ee. Sulci of ventral plates indicated only as short 

 traces at the anterior border; only the first two 

 pairs of legs with two tarsal spines; first three 

 articles of antennae glabrous. 



0. tibialis Brolemann. 



Otostigmus limbatus Meinert. 



Vid. Medd. nat. foren. Kj0behavn, 1884, p. 120; Karsch, Berl. ent. zeitschr., 

 1888, 32, p. 31; Silvestri, Ann. Mus. civ. stor. nat. Geneva, 1895, ser. 2, 

 14, p. 766; Boll. Mus. zool. anat. comp. R. univ. Torino, 1895, 10, p. 23; 

 Brolemann, Rev. Muscu Paulista, 1901, 5, p. 37; Kraepelin, Revis. Scolop., 

 1903, p. 130; Cat. Myr. Bre.sil, 1909, p. 13. 



Localities. — "Brazil" (sec. Meinert; spec. Mus. Copenhagen); 

 State of Sao Paulo: Alto da Serra, Santos. 



This species is also known from Paraguay, from where two of 

 Meinert 's typical specimens came, and from Argentina (Buenos Aires). 



Otostigmus amazonae, sp. nov. 



Bluish green to olive-brown; with a fine median longitudinal pale 

 line. Head distinctly darker, deeper green. Antennae bluish green 



