286 - Transactions.—Zoology. 
junction of anterior and outer borders ; lip truncated, rather longer than 
broad, dark red brown. 
Sternum oval, pale and brown. 
Abdomen a long oval, pointed posteriorly, down the centre runs a reddish 
toothed band containing a sooty longitudinal mark vandyked or formed by 
confluent lozenges, on either side of the reddish band a sooty stripe bordered 
by pale yellowish white hairs. Under surface pale yellowish, with three 
longitudinal dark lines. 
Ricearton bush ; on shrubs. 
7, SALTICUS ALBOBARBATUS, n.s. Fig, 8. 
Length of mature male, -25 inch. 
Cephalo-thorax oblong, sloping forwards anteriorly, sloping away abruptly 
posteriorly ; sides very slightly convex, glossy black, slightly iridescent, and 
sparsely clothed with coarsish black hairs. 
Eyes, three rows; anterior middle pair far the largest, eyes of second row 
very small midway between anterior and posterior rows. Beneath the 
anterior row of eyes is a remarkable beard-like growth of pure white hair, 
converging from the sides towards the middle line, and contrasting strongly 
with the glossy black which is the prevailing colour of the spider ; this 
beard nearly conceals the falces. 
Abdomen ovoid, rather pointed posteriorly. Colour glossy black. 
Legs, 4, 3, 1, 2; not very robust ; black, becoming brownish towards 
distal segments. A black scopula terminates the tarsi; all the legs are 
sparsely clothed with black and whitish hairs, 
Having only dried male specimens I am unable to give further particulars 
with accuracy. 
Habitat, shingle slides. Castle Hill ; collected by J. D. Enys, Esq. 
Art. XXXII—WNotes on the Stridulating Organs of the Cicada. 
By Lr. Powert, M.D 
(With Illustrations.) 
[Read before the Philosophical Institute of Canterbury, lst May, 1872.] 
Ar page 351 of “The Descent of Man” (1871) I find the following state- 
ment:—“The Cicadide usually sing during the day, whilst the Fulgoride 
appear to be night-songsters. The sound, according to Landois, who has 
recently studied the subject, is produced by the vibration of the lips of the 
spiracles which are set into motion by a current of air emitted from the 
trachee. It is increased by a wonderfully complex resounding apparatus, 
