1951] 
Hungerford — African Hydrometra 
67 
near the costal margin and the other a broader median band 
which arises from it near its base. Both bands are broken 
by the dark veins that cross them. There is a streak of white 
on the hemelytra paralleling the sides of the scutellum. 
Underside of body somewhat frosted, the sides of the abdo- 
men with a nearly black subconnexival band broken at the 
segmental junction by frosted spots. 
Structural characteristics: 
Head: Length 93 units; the ratio of the anteocular part 
of the head to the postocular part is given by the formula 
AO : PO : : 57 : 27. The dorsal interocular groove less than 
the diameter of the eye. The clypeus is quadrate, medi- 
anly depressed and slightly emarginate in front, its median 
length about three fifths its width, the rostrum surpassing 
two thirds of the postocular distance. The antennal seg- 
ments : 1 : 2 : 3 : 4 : : 18 : 34 : 77 : X.f 
Pronotum: Length 46 units* ; the pitting very faint, 
almost indiscernible, only the curved row of pits behind the 
anterior acetabulum plainly marked. 
Coxae: The distance between the first and second coxae 
is to that between the second and third as 34 : 62. The 
anterior acetabulum has a faint pit on each side of the cleft. 
The middle acetabulum with two faint pits on each side of 
the cleft; the posterior acetabulum is unpitted on the sides 
but faintly pitted above. 
Femora: The anterior femora surpass the base of the 
antennal tubercles. The hind femora reach the tip of the 
abdomen. 
Abdomen: The last abdominal segment and the first 
genital of the male without hair tufts or spines. The first 
genital segment ventro-laterally depressed, leaving a broad 
midventral longitudinal keel with some hairs on either side. 
Seen from above, the first genital segment is broadest about 
the middle; the terminal dorsal process is stout, slightly 
upturned and less than one third the length of the segment. 
Comparative notes: This species is near H. smithi H & E., 
described from Sierra Leone, but both the shape of the ter- 
t last segment missing. 
* unit = .033 mm. 
