K. Jordan and N. 0. Rothschild 
71 
Carlos Berg; and several pairs from Minas Geraes (A. Kennedy), no 
host being given. 
The large development of the fifth tarsal segment is suggestive of 
the genus Malacopsylla Weyenb. 
We also have a </ and a $ from Sapucay, Paraguay, off Didelphys 
spec., collected by W. Foster, the differing from the above described 
in the clasper bearing but 3 bristles at the tip. 
(2) Rhopalopsyllus lutzi Baker (1901). 
Pulex lutzi Baker (1904, pp. 378, 380, Sao Paulo, off Orison vittata). 
Rhopalopsyllus lutzi Baker (1905 a, pp. 128, 130). 
We have not seen Dr Baker’s specimens, and therefore must rely on 
the description he gives. Unfortunately the description appears to be 
very faulty, some of the statements at least being certainly incorrect. 
In 1904 the palpus is said to be “apparently six-jointed,” while it is 
stated to be four-jointed in 1905. 
The metanotum is desci’ibed as having only two rows of bristles like 
the pro- and mesonotum, a statement which requires verification. Only 
the first and second abdominal tergites have the second row of smaller 
bristles, the remainder having each but a single row of about 13 bristles. 
The frontal portion of the head bears two rows of bristles, the anterior 
row consisting of 4 smaller bristles, the second row of 3 much larger 
ones. The clasper appears to be similar to that of R. cleophontis, being 
“ armed at the tip with 3 stout close set spines.” The stylet of the $ 
is cylindrical. The hindtibia has about 8 stout bristles on the outer 
side. 
Length. 5'5 mm., $ 6 mm. 
Both sexes from Sao Paulo, off Grison vittatus, in the United States 
National Museum. 
We believe this insect to be a near ally of R. cleophontis. 
(3) Rhopalopsyllus australis Rothsch. (1904). 
(PI. Ill, fig. 11; VI, figs. 10, 11.) 
Pulex australis Rothschild (1904 a, p. 613, n. 8, t. 9, fig. 29, t. 10, figs. 34, 36, partim, 
Tabasco, Mexico, off Dicotyles lahiatus). 
Rhopalopsyllus australis Baker (1905, pp. 130, 143). 
Head. The first segment of the maxillary palpus is as long as the 
third, the second being a very little shorter than the fourth. The 
