148 
RECORDS OF TIIE AUSTRALIAN MUSEUM. 
the Macleay Museum, and I therefore have much pleasure in 
associating his name with it, specifically. 
Genus Percosoma, Schaum. 
Percosoma mastersi, sp. nov. 
(Fig- 1)- 
Measurements: — Head(to tips of mandibles) 5 mm. long, 35 mm. 
6'9 mm. wide; elytra 11*7 mm. 
Black, shining, narrow, elong- 
ate. Head rather large, smooth ; 
transverse impression behind the 
eyes strongest laterally, faint 
behind vertex ; vertex rather flat, 
frontal impressions well defined, 
short, anterior angle with a row 
of six punctures ; jaws not long, 
hooked at apex ; eyes prominent, 
inclosed behind, projecting before 
post-ocular prominences — t h es e 
not strong. Antennce subfiliform, 
clothed with pale, yellowish 
bristles ; basal joint has a deep 
round puncture above. Pro- 
thorax slightly convex, cordate, 
truncate in front and behind, 
median line lightly marked ; sides 
slightly rounded on anterior half, 
gently narrowed but not sinuate 
towards base ; lateral border narrow, extending from anterior to 
posterior angles — the latter somewhat obtuse. Elytra convex, 
oval, narrow, striate (the stria? — seven upon each elytron — very 
distinct), intermediate spaces flat ; shoulders rounded ; base 
declivous to peduncle, apex broadly rounded ; lateral border 
narrow ; within the outer margin of each elytron, there is a row 
of small punctures, widely separated from each other individually; 
of these four are seated well forward, one at the centre, and the 
remainder (four) towards the apex, the last three rather closer 
together. Ventral surface lightly rugose laterally. Anterior legs — 
thighs canaliculate below, dilatate at middle ; outer angle of tibia 
finely serrated. 
Obs. — Judging from the fact that the anterior thighs are similar 
to those of the female of P. montana as described by Sloane;* the 
species diagnosed above is doubtless a female also. 
wide ; pro-thorax, 6 mm. long, 
long, 7*3 mm. wide. 
Fig. 1. 
* Loc . cit ., p.^GO. 
