93 
Length 4 mm.; width of abdomen 2 mm. 
Habitat: Taken from an antelope at Kasongo, January 28th, 1 905. 
All four specimens are females. The same host also harboured a 
number of ticks, (q.v.) 
The absence of ocelli in the female is rather remarkable. There 
is also an almost entire absence of external mouth parts, including the 
labial sheath; the only indication of these organs being a minute 
truncated cone, the exact nature of which could not be determined in 
the limited supply of material. 
FAMILY PULICIDiE 
Dertnatophilus ( Sarcopsylla ) penetrans, Linn. 
(PI. vi, figs. 1, 2) 
Larva long, cylindrical, of fourteen almost equal segments. Head 
slightly longer than the second segment, narrowest in front, but rather 
widely rounded. Antennae short, apparently of three segments, the 
basal and apical segments very short; apex with a central long slender 
spine and two to three minute ones. Surrounding the base of 
the antenna ventrally is a semicircular group of blunt spines, the two 
