BY E. W. FERGUSON. 



16^ 



minent and subconical on declivity; fourth with a few tubercles, 

 similar to those on second, or without tubercles; fifth and sixth 

 interstices each with a continuous row similar to third. Sides 

 with vertical, little prominent ruga;. Beneath, with a median 

 ridge clothed by the median vitta, fifth segment deeply longi- 

 tudinally grooved on either side of vitta; apical segments with 

 fine, somewhat asperate, setigeixDus granules. Anterior femora 

 ridged beneath. 



9. Similar to (J; prothorax less dilatate; convex beneath, with 

 feebler vitta. 



Dimensions: ^, 26 x 8*5 mm. ; 9, 25 x 8 mm. Another ^ 

 measures 21 x 6*5 mm. 



ffab. — 8outl# Australia : Eucla, NuUabor Plains, Eyre's Sand- 

 patch. 



The above description was drawn up from two specimens which 

 were compared, for me, with the type, in the British Museum, 

 by Mr. K. G. Blair. In his letter, Mr. Blair writes, "type has 

 more swollen thorax of 5, but granules of elytra like those of 6." 

 In a long series of this species which I have examined, great 

 differences were noticeable in the number of the elytral tubercles; 

 there was also some difference in the size of the tubercles; 

 and, in one or two, the elytra were not subparallel, but narrowed 

 towards the apex. 



The following tabulation will indicate the great differences in 

 the number of the tubercles. 



Specimen. 



Number of tubercles 011 interstices. 



(J .Eyre's 8andpatch 

 (? .No locality 

 6 .Nullabor Plains 

 (S .Eyre's Sandpatch 

 i .NuUabor Plains 

 9 .Eyre's Sandpatch 



9. Eucla 



9.Eucla{?) 



2. 



7-9 



6 



2 



6 



5 



4 



7-8 

 3-5 



6. 



15 



14-12 



13-12 



10 



12-13 



12 



14 



9* 



•Tubercles only traceable in apical half. 

 In cases where the number of tubercles on the two sides varies, 

 the number on the right side is given first. 



