64 
The Noil-Combed Eyed Siphonciptera 
not produced rectangularly. The eighth abdominal sternite of the £ 
bears 2 ventral bristles on each side, placed far apart from each other. 
The two movable processes of the clasper of the J 1 are larger than in 
L. gerbilli. 
Dr J. Wagner received one pair of this insect from Sultan Bent, 
River Mourgab, Transcaspia, off a small species of owl. 
5. Group of species. 
Episternum of metathorax separated from the sternum. Hindfemur not angulate 
beneath, its greatest width further back than in all the other forms of Loemopsylla. 
Bristles of body and legs stout and black. Frontal portion of head with 6 long 
bristles ; occiput with about 8 ou each side, arranged in two 'oblique rows, besides 
the subapical row. Stigmata of abdomen longer than the groove for insertion of 
the first bristle of the tergite ; in $ at least 2 bristles beneath the stigmata, in 5 4 
or more. Midcoxa very strongly rounded behind, the hind edge being almost 
semicircular. To this group only species No. 24 belongs. 
(24) Loemopsylla chephrenis Rothsch. (1903). 
(PI. II, figs. 5 and 7.) 
Pulex clieplirenis Rothschild (1903, p. 86, n. 5, t. 1, fig. 7, t. 2, figs. 14 and 18, Cairo, 
off Acomys cahirinus and Dipus jaculus) ; Baker (1905 a, p. 141). 
Pulex alternans Waklgren (1904, p. 1, figs. 1 and 2, Cairo, off Acomys cahirinus ); 
Baker (1905 a, p. 140). 
The most distinct looking species in the genus on account of the very 
dark coloured bristles. 
Head.. The frons (PI. II, fig. 5) is moi’e strongly and abruptly 
rounded, especially in the $, than in the other species of Loemopsylla. 
There are 6 long strong bristles on the frontal portion of the head. One of 
these bristles is placed in front of the eye, but at a distance from it, one 
above the insertion of the palpus, a third at the oral edge, a fourth 
beneath the eye and two more are situated on the genal process. On 
the occiput there is a subapical row of 7 strong bristles and two oblique 
lateral rows, the anterior one consisting of 3 bristles and the second one 
of 4. The d has 5 to 8 small hairs above the antennal groove. The eye 
is small. The posterior apical angle of the first antennal segment of the 
$ is hardly produced at all. The second segment, in both sexes, bears 
a transverse row of 3 hairs, the third hair being long, while the 
others are much shorter than in the other species of Loemopsylla, there 
being also 2 short thin hairs at the hind edge of the segment. In the 
$ this segment differs from that of other species in the apical, 
