Iv. Jordan and N. C. Rothschild 
33 
prominent in cheopis than in the other forms mentioned (PL I). The 
hindfemur in Loemopsylla always bears a row of hairs on the inner 
side. The tibiae are never hairy all over the outer surface. The relative 
length of the bristles of the tibiae and of the tarsal bristles, especially 
of those placed at the apex of the second hindtarsal segment, afford 
reliable distinctions, at all events between some of the species (PI. Ill, 
figs. 7 and 8). The fifth tarsal segment bears 4 bristles on each side, 
besides a thin hair situated between the third and fourth bristles and 
placed a little more dorsad than these. Ventrally at the apex there are 
either 1, 2 or 3 short spine-like bristles, the number being sometimes 
not quite constant in the various individuals of a species (PI. Ill, figs. 7, 
8). The fore-, mid- and hindtarsi also differ as a rule in this respect. 
24 species of Loemopsylla are known. The number will doubtless 
be greatly inci’eased when the Siphonaptera of Asia and tropical Africa 
are better known. We are not acquainted with two of the species, 
described by Enderlein and Wagner respectively. They are placed in 
the present article where we think they belong according to the 
descriptions given by the authors, which are quite insufficient. 
Key to the species of Loemopsylla. 
a. Frontal portion of head with 1 or 2 long bristles ...b 
Frontal portion of head with 6 long bristles.Species No. 24 
b. Episternum and sternum of metathorax not separated from each other by a 
suture ; hindfemur with or without tooth ventrally at the w'idest point.c 
Episternum and sternum of metathorax separated from each other by a suture ; 
hindfemur with tooth ventrally at the widest point.g 
Episternum and sternum of metathorax separated from each other by a suture ; 
hindfemur without a tooth ventrally at the widest point .o 
c. Hindfemur with a tooth ventrally at the widest point ...d 
Hindfemur without this tooth .Species No. 5 
d. Fourth segment of hindtarsus short, triangular in outline .e 
Fourth segment of hindtarsus elongate .f 
e. Middle tergites of abdomen with a row of 8 or more bristles on the two sides 
together .Species No. 1 
Middle tergites of abdomen with a row of 6 or less bristles on the two sides 
together .Species No. 2 
f. Rostrum reaching to the trochanter.Species No. 3 
Rostrum not reaching to the trochanter .Species No. 4 
g. Subapical bristle of the seventh abdominal tergite in <$ on a conical process 
which projects beyond the apex of the segment; seventh sternite of 5 with about 
15 bristles in front of the postmedian row on the two sides together ...Species No. 13 
Subapical bristle of £ on a process, hindfemur in both sexes with 3 bristles on 
the outer side .Species No. 14 
Parasitology i 3 
