82 
its prothorax at the widest considerably behind the middle, 
while the head of znquzsztor is not longitudinally concave, and its 
prothorax is at the widest across the apex. 
N.W. Australia. 
O. (?) linearis, sp. nov. Elongata, angusta; pubescens; piceo- 
fusca, labro mandibulis basin versus clypeo (antice) anten- 
narum articulo basali (subtus) prothoracis vittis 2 elytrorum 
marginibus vittisque discoidalibus nonnullis et pedibus (his 
fusco-adumbratis) testaceis ; capite valde elongato, sparsius 
fortius ineequaliter punctulato ; palpis maxillaribus elongatis, 
articulo ultimo elongato-cultriformi quam precedens sat 
longiori ; mandibulis ad apicem simplicibus minus acutis ; 
antennis gracilibus (exempli typici articulo ultimo carenti) ; 
oculis permagnis fortiter longitudinalibus (superne visis), 
fortiter granulatis; prothorace vix subcordiformi, fere ut 
caput sed paullo magis crebre punctulato, indeterminate 
inequali (in medio longitudinaliter plus minusve subcarinato 
et latera versus subimpresso), quam latiori dimidio longiori, 
latitudine majori paullo ante medium sita; elytris crebre 
subtilius aspere punctulatis, lineis subelevatis haud 
instructis. Long., 3—441.; lat., +—1, 1. 
This is a very interesting little insect, and combines resem- 
blance to one and another of the preceding five species in a dis- 
tinctly perplexing fashion. In shape, colour, and markings it is 
extremely like ornatipennis, but has, inter alia, the head very 
much more elongate, the maxillary palpi very much more elon- 
gate, the eyes quite differently shaped, the prothorax very much 
more elongate and differently shaped, and the elytral markings 
different in detail. In ornatipennis the well-defined apparently 
constant lines are three in number (including the suture and 
lateral margins) while in linearis there is an additional one 
similar to the other three, and placed a short distance from the 
lateral margin, and another (which, however, only reaches to 
about the middle of the elytra) placed at a short distance from 
the suture. The prothorax, to a casual glance, might appear as 
if it ought to be called subcylindric, but on careful inspection it 
is found to be of essentially similar form to those of its allies, 
the difference being only of degree, owing to the less develop- 
ment of the rotundity of outline in the front part of the sides. 
Its eyes are altogether like those of O. caviceps, from which, 
inter alia, it differs by the even longer and more rostriform front 
part of its head, its very differently shaped and proportioned 
prothorax, its very different markings, and much narrower build. 
W. Australia (Coolgardie, &c.). 
a 
