BY THE REV. T. BLACKBURN 581 



hindwards more evenly and less strongly than is usual in the other 

 species know^n to me, the more usual structure being that these 

 crests diverge gently hindward for a little distance from the front 

 and then take a curved form so that the lateral edges converge 

 again towards the base. The difference of the sexes in general 

 form is less than usual, the narrower sex having the apical ventral 

 segment with a wide shallow longitudinal impression in its hinder 

 half and the other sex having near the apex of the same segment 

 a round excavation. This is a very dull black insect, with at 

 most some inconspicuous greyish dust-like squamosity. The tarsi 

 are slender and elongate in both sexes. 

 S. Australia ; near Port Lincoln. 



DiALEPTOPUS SEPIDIOIDES, PaSC. 



I possess an example from Western Australia agreeing per- 

 fectly with the description and figure of this insect, and also an 

 example from the same locality which I feel satisfied is the other 

 sex of the same, though the differences that I believe to be sexual 

 are very marked. The species is characterised by its greyish- 

 brown general colour (due to squamosity on a blackish derm) 

 ferruginous colour of tubercles, elytra very much narrower across 

 the humeral processes than the greatest width of the prothorax, 

 anterior projection of prothorax not bilobed, antennal scape very 

 fully as long as apical joint of front tarsi (without the claws), 

 basal two joints of funicle each evidently longer than any of the 

 other joints, and elytra (together) with the apex widely (some- 

 what near semicircularly) emarginate. The sex described by Mr. 

 Pascoe (the male, I suppose) is an exceptionally narrow form, 

 with the elytra (the tubercles disregarded) not wider than the 

 prothorax, the front tarsi much wider and shorter than the other 

 tarsi, and the elytra with strong conical tubercles in two rows, — 

 the inner one of 7 or 8 distinct tubercles (in my example 7 on one 

 elytron, 8 on the other) the outer one of 5, — the last ventral seg- 

 ment reflexed at the apex immediately behind a strong trans- 

 verse furrow and deeply sulcate down the middle, the metasternum 

 and ventral segments strongly nitid. 



