232 



To see the W-shaped excavation of the prosternum clearly 

 iii is necessary to remove the head ; from most directions it is 

 difficult to see the line dividing the front face of the clypeus 

 from the labrum. The clothing is remarkable, especially on 

 the elytra, where the setae or scales on perfect specimens seem 

 to be in geminate rows, with the white ones stouter than the 

 black ones, and either lanceolate in shape, or elongate-elliptic; 

 on the upper-surface even where dense the derm may usually 

 be seen from an oblique direction, but on the hind-parts and 

 the under-surface the scales are so dense and flat that most of 

 the derm is hidden. 



Maechidinus marginalis, ii. sp., or var. 



Ten specimens differ from latericollis in having the pro- 

 thorax wider, its clothing longer and more upright, the pale 

 setae continued across both base and apex (on all the specimens 

 of latericollis the pale clothing is confined to the sides), 

 clothing of head longer and almost entirely pale, under-surface 

 with clothing more setose in character, even on the abdomen 

 (where the scales are all distinctly longer than wide, and many 

 are longitudinally ribbed) and the hairs on the legs longer and 

 denser. Length, 8-9 mm. 



Hah. — Western Australia: King George Sound 

 (Macleay Museum). Type, I. 10796. 



There are ten specimens of the present form before me, 

 all from King George Sound ; and six of latericollis, all from 

 Beverley, so that the differences noted are unlikely to be 

 sexual; the curious front tibiae and lateral notches of 

 prothorax are exactly alike on the two forms, but the distinctly 

 wider prothorax of the present form is unlikely to be of varietal 

 importance only. A specimen of this form was standing in the 

 Blackburn collection at the end of Auto mollis, but it was 

 damaged and the head was so mouldy that the antennae were 

 concealed, hence he probably regarded them as broken off, 

 and so refrained from describing it. 



Cryptodus. 



It is difficult and in many instances impossible, unless 

 they are dissected out, to count the joints of the antennae of 

 species of this genus, owing to the greatly dilated basal joint 

 concealing some of the following ones, and to the brevity of 

 the joint preceding the club, the latter I have presumed in 

 every instance to be three- jointed. Probably Fairmaire 

 dissected them out to make certain of them, as I have had to 

 do in many instances, thus making certain that his counts of 

 the antennae of variolosus and piceus as being nine-jointed 



