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. | 
QO. goeldi Brélemann. 
ec. 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...... QO. caudatus Brélemann. 
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 fwentictl 
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........ O. 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. 
QO. tibialis Brolemann. 
OTOSTIGMUS LIMBATUS Meinert. 
Vid. Medd. nat. foren. Kj@behavn, 1884, p. 120; Karsch, Berl. ent. zeitschr., 
1888, 32, p. 31; Silvestri, Ann. Mus. civ. stor. nat. Genova, 1895, ser. 2, 
14, p. 766; Boll. Mus. zool. anat. comp. R. univ. Torino, 1895, 10, p. 23; 
Brélemann, Rev. Museu Paulista, 1901, 5, p. 37; Kraepelin, Revis. Scolop., 
1903, p. 180; Cat. Myr. Brésil, 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 
