L. Harrison 
307 
lateral margins being at all prominent. The form of the apparatus is 
indicated in Fig. 9. The genital plate of the ?, as shown in Fig. 8, is 
shaped like an arrow-head with broken tip, each barb being set with a 
row of about twelve stout spines. 
The chaetotaxy of the head agrees very remarkably with that of 
Ornithobius fuscus. There are a number of short hairs on the forehead, 
two more on each side in the d than in the $; a short hair in the eye; 
five on the temple, of which the second is a little, and the fourth con¬ 
siderably, longer than the rest; and one short prickle on the hind 
margin close to the angle. The prothorax carries a pair of hairs on 
the posterior margin, close to the stigmata. The metathorax has two 
lateral hairs in front of the posterior angle, and three, set in a single 
large pustule, inside the hind margin close to the angle. In the S 
abdomen, each segment save the last has a short backwardly directed 
spinous hair at the posterior angle; the anterior segments have, in 
addition, one or two softer hairs; the sixth segment has two pustulated 
hairs partly inserted into the subsidiary transverse band; the seventh 
segment has four pustulated hairs on either side; the eighth segment 
a long and a short hair on either side; the ninth segment, three short 
hairs. Ventrally, there is a group of about eight hairs in the middle of 
the first sternum, a median pair on the second to the fifth, flanked by 
minute prickles, two pairs of prickles only on the sixth, and a group of 
about a dozen short hairs on the latter half of the eighth. The genital 
opening is ventral, the posterior margin of the sternum being notched 
in the middle, and bearing an evenly spaced fringe of about a dozen 
short hairs. In the $ the anterior segments are much as in the d- The 
seventh has two long hairs on the lateral border, in front of the angle, 
and three pustulated hairs on either side on the hind margin. The 
eighth has a long hair and a prickle at a third of its length laterally, 
and three pairs projecting from the ventral surface. The ninth has a 
short lateral prickle. 
Measurements in millimetres. 
i 9 
Length ilreadth Length Breadth 
Head . 0-91 0-58 0-87 0-59 
Protliorax. 0-35 0-42 0-35 0-42 
Metathorax . 0-35 0'67 0-40 0-71 
Abdomen . 1-97 0-64 2-42 0-71 
Total length and 
greatest breadth 3-58 0-67 4-04 0-71 
26-2 
