88 
The Eon-Combed Eyed Siphonaptera 
segments have each 1 or 2 very long thin apical bristles in the </ (the 
tarsi of our single $ are broken). The third pair of bristles of the fifth 
tarsal segment is placed more towards the centre of the segment than is 
usual, the sole of this segment having a number of small hairs. 
Modified segments. . The eighth sternite, which is large, bears 
on each side close to the ventral apical corner three long bristles, besides 
a number of other bristles placed on the lateral surface. The clasper is 
very large, narrowing into a large curved manubrium. The dorsal 
apical corner of the clasper is somewhat prolonged upwards, while the 
ventral margin bears a long slender process furnished with three long 
bristles at the apex. Along the posterior edge of the clasper there 
is a row of long bristles. The external horizontal portion of the ninth 
sternite is also large, the lower apical angle being acuminate. This 
segment bears three patches of bristles.—- $. The seventh sternite is 
broadly emarginate, there being no lobe above this shallow sinus, while 
there is a broad lobe beneath it. The sixth sternite also bears a small 
sinus. The eighth tergite has a few bristles above the stigma, a row of 
about 6 long ones running from the stigma downwards, and an apical row 
of about 8, besides some short bristles situated near the longer apical 
ones. The stylet is cylindrical. 
Length. £ 2T mm., $ 4 mm. 1 
We have 2 ,/</ anc ^ 1 ? from Challapata, Bolivia, off Octodontomys 
(= Neoctodon) simonsi, 11th October, 1901 ; and another from Potosi, 
Bolivia, off Akodon albiventer, 26th September, 1901; P. 0. Simons. 
(3) Parapsyllus cocyti Rothsch. (1904). 
(PI. II, fig. 2; VI, fig. 5.) 
Pulex cocyti Rothschild (1904 a, p. 617, n. 12, t. 9, fig. 26, t. 10, fig. 31, Chile, off 
Burrowing Rat). 
Rhopalopsyllus cocyti Baker (1905 a, pp. 130, 143). 
Head. The rostrum reaches to the apex of the forecoxa, the labial 
palpus consisting of five segments. There are a number of small hairs 
beneath the eye, one of them being situated at the tip of the genal 
process. The frontal tubercle is placed near to the frontal oral angle. 
There is no incrassation from the antennal groove upwards in 
either sex. 
Thorax. The tergites bear each two rows of bristles, the anterior 
row not extending so fin- down as the posterior one. The mesonotum, 
1 In this specimen the segments are extended. 
