BY E. AV. FERGUSOX. 705 



before middle, ocular lobes prominent; subapical constriction 

 fairly definite, median line hardly impressed; set with small, 

 separate, distinct though slightly depressed tubercles, somewhat 

 irregular in size and distribution. Elytra (10 x 6'5 mm.) gently 

 and evenly widened from base to behind middle, thence more 

 rapidly rounded off to apex: base, humeri, seriate punctures as 

 in S. vittatus; interstices tuberculate, on second and third small, 

 subconical, projecting backwards, degree of conicity increasing 

 from before backwards, on second tubercles extending half-way 

 down declivity, on third forming a row of separate tubercles from 

 base to apex; fifth and sixth interstices each with a continuous 

 row of smaller tubercles, having somewhat a serrate appearance; 

 tubercle-index 3-4, 9-iO, 0, 16, 11. Beneath, as in S. vittatus. 

 Dimensions : ^, 16*5 x 65 mm. 



Apart from size, and variation in the number of the elytral 

 tubercles, the main differences seem to be — (a) a slight difference 

 in shape, (6) prothoracic tubercles more rounded than elongate, 

 (c) slightly smaller elytral tubercles. None of these dififerences 

 seem to me as of specific value. 



The confusion one feels, when comparing the types, is not 

 allayed but rather intensified by the examination of a series of 

 specimens. Among a number of Amycterides sent for examin- 

 ation from the South Australian Museum, are. several specimens 

 I would refer to this species. Among them, I note the following 

 forms. 



1. Specimens agreeing with type of S. vittatus; males without 

 exact locality-label. 



2. Specimens labelled Grange, S. Aust., in shape and general 

 appearance agreeing with S. conspersus, but with decidedly larger 

 elytral tubercles, and less distinct prothoracic ones. 



3. Specimens from Androssan, S. Aust. An extensive series 

 of both sexes. The males are close to S. vittatus (typical) but 

 smaller, with the tubercles on the third interstice more separate. 

 The females are larger, and correspond to >S'. vittatus 9, but show 

 considerable variation, inter se, in the elytral tubercles. The 

 colour of the setae, though generally dark, is, in one or two speci- 

 mens, light brown or yellow, showing an approach to*S'. con/usus. 



