100 



variable, it appears never to extend to the portion between the 

 9th stria and the lateral margin ; in some examples it consists 

 merely in the strif^' being darker than the general colour, and in 

 others it sufiuses nearly the whole disc. The sculpture (excluding 

 the punctulate stride of the elytra) is so fine that the insect may 

 almost be called laevigate, but the space between the 9th stria 

 and the lateral margin is a little more distinctly punctulate than 

 the general surface. On the underside tlie puncturation is not 

 much more distinct than on the upper surface except on the sides 

 of the metasternum, where it is moderately defined. 



S. Australia ; Port Lincoln, also near Morgan. 

 P. ohtusus, sp. nov. Latus ; postice quam antice parum fortius 



angustatus ; elytrorum striis minus perspicue punctulatis ; 



cetera ut P. anstralis. Long., 14- 1. ; lat., ^ 1. 

 The difference of this insect from the preceding in respect of 

 shape strikes the eye at once, this being at its widest scarcely in 

 front of the middle, and being not much more narrowed hind- 

 ward than in front, while in australis the greatest width is con- 

 siderably in front of the middle, and the front part of the insect 

 is wide and obtuse, with the hinder part strongly narrowed. In 

 ohtusus none of the striii? are distinctly punctulate, while in 

 australis the external strict are dotted with well-defined isolated 

 punctures, 



S. Australia ; near Port Lincoln. 

 P. rotundus, sp. nov. Rotundus ; brevis ; elytris haud longiori- 



bus quam conjunctim latioribus ; his margine laterali latis- 



simo, striis minus crebre punctulatis ; cetera ut P. australis. 



Long., 1 1. ; lat., | 1. 

 This species is exceedingly close to the preceding two, but its 

 shape is so distinctly different that I cannot regard it otherwise 

 than as a good species. Its outline is nearly a circle, the elytra 

 down the suture being (by measurement) not at all longer than 

 they are together wide at their widest part ; in the preceding two 

 species they are distinctly longer than together wide. The 

 interval between the 9tli stria and the lateral margin is in 

 P. rotundus distinctly wider than in the preceding two species, 

 especially in its hinder part. The puncturation of the stria? is 

 stronger than in P. ohtusus, and the punctures are less closely 

 placed than in P. australis. 



S. Australia ; near Port Lincoln. 



PIIALACRUS. 



p. corruscus, Panz. A Pltalacrus occurring commonly in 

 South Australia, and wiiich I have met with in Victoria also, 

 appears to me incapal)le of separation from this European 

 species. 



