18 THE ZOOLOGIST. 
between the mandible and maxilla, it is lodged between the palp 
and the first leg. It has been found in several genera (Hystero- 
crates, Phoneyusa, &c.), ranging all over Central Africa, from Old 
Calabar and the Congo on the west, to Masailand on the east; 
and also in genera met with in Socotra and Madagascar. If a 
leg of the first pair in any of these genera be detached, it may be 
noticed that there is a fringe of hairs bordering the front edge of 
the upper surface of the first and second segments (coxa and 
trochanter). On the coxa immediately beneath this fringe, and 
partially buried in it, there are one or two long stout clavate 
spines, and some smaller ones as well (Fig. 2, A, a). On the 
N 
B ft - S&S 
aH’ Bee 
PU ey LEB 
ty 
My a 
A a ALE 
Se - = Ge me Z 
SERIES = ee 
Su = SSS — 
PRIS ae 
Fic. 2.—Stridulating organ of Phoneyusa sp. 
A. Anterior surface of first and second segments of leg of first pair, with 
club-shaped bristles a on coxa and row of erect spines 6 on trochanter. 
B. Posterior surface of first and second segments of palp, with rows of 
short spines c on maxilla and rigid brush-like bristles J on trochanter. 
trochanter there is beneath the fringe a series of upstanding long 
curved spines (Fig. 2, A, b). When the limb is at rest in its 
normal position the front surface of these two segments are 
closely in contact with the posterior surface of the corresponding 
segments of the palp. It is here therefore that the remainder of 
the organ is found. It consists of a couple of irregular rows of 
spines on the basal segment (Fig. 2, B, c), and of a thick brush 
of very fine but stiff bristles upon the trochanter (Fig. 2, B, d). 
When the Spider is allowed to dry after removal from alcohol a 
