514 REVISION OF THE AUSTRALIAN SPECIES OF BOLBOCERAS, 



seen another example (also from New South Wales) in Mr. Jung's 

 collection. I can find no character likely to be sexual except that 

 of the f rons in one of my specimens being less concave and much 

 more closely punctured than in the other examples. I have 

 described the sculpture of the head of this species at full length; 

 but as the general character of the sculpture of the head is very 

 uniform throughout the Third Group it seems to me unnecessary 

 to repeat the full description, and I purpose therefore, in dealing 

 with the following species, to confine myself to stating those 

 characters in respect of which their heads are sculptured 

 difi'erently from the above description. Except in respect of the 

 supposed sexual difference noted above, the specimens before me 

 show very little variation inter se; there is, however, a certain 

 amount of variation in the shape of the concavity on the pro- 

 notum, which, in some examples, is nearly circular, and in others 

 more or less oval. 

 N. S. Wales. 



B. GAYNDAHENSE, Macl. 



I possess two specimens which I attribute to this species, and 

 have seen another in Mr. Griffith's collection. Some years ago I 

 compared one of my own specimens with the type and con- 

 sidered it identical, but I hesitate to attach any certainty to the 

 determination, as at the time I made it I had not studied the 

 genus sufficiently to justify ray feeling sure that I may not have 

 overlooked some character that called for attention. Every 

 worker on the Coleoptera is, of course, aware that the results 

 of a comparison among closely allied species is unreliable 

 unless the person who makes it has the particular characters that 

 require attention accurately in his mind. Nevertheless, in this 

 case, I believe my determination was right, as (in addition to the 

 apparent identity) the circumstances of capture pointed to the 

 probability of my specimen being cjayndahense. It agrees with 

 Macleay's description (such as it is), but that alone would certainly 

 not be conclusive. The species is the largest known to me of 

 Group iii. (long. 51 1.), and is distinguishable from all the others 

 known to me of the same group by the 9th stria of the elytra 



