66 



misfortune to break my dissections of the mouth parts and" 

 was not able to furnish details of them, beyond such as I 

 could gather from inspection of the fragments. A small frag- 

 ment of a maxilla had a small tooth, and so I merely stated 

 of the maxilla that it was "toothed," and on that ground 

 considered it excluded from the Pachypodides and excluded 

 from that aggregate I could only regard it as a Macrophyllid 

 aberrant in facies and in respect of its claws. I have now 

 made a more successful dissection, with the result of con- 

 sidering it an aberrant Pachypodid. The outer lobe of its 

 maxillge is not altogether atrophied, as Lacordaire states those 

 of the Pachypodides to be, but it is extremely feeble — a mere 

 short, straight, ciliated projection, which, however, becomes 

 corneous at the extreme apex, and is there bifid, so as to 

 simulate two minute teeth, which in a fragmentary maxilla 

 I took to be apices of a larger tooth. In all other respects 

 the mouth parts agree well with those of the Pachypodides, 

 the mentum being very small without a visible ligula and 

 the labial palpi having their apical joint cylindric and about 

 three times as long as the preceding joints (which are ex- 

 tremely minute) together. I feel no doubt that this very 

 remarkable insect is a Pachypodid, aberrant to the extent of 

 having the outer lobe of its maxillge a little more developed 

 than is usual in that aggregate. 



This seems to be the first true Pachypodid recorded from 

 Australia, for although Erichson referred to the aggregate a 

 genus which he characterized under the name Prochelyna, 

 Dr. Sharp has pointed out the probability that that genus 

 (of which, however, he had not seen a representative) ought 

 to be placed in his "Systellopides" and in this I have no doubt 

 of his correctness, as I have before me an insect recently taken 

 by my son, Mr. J. S. Blackburn (and also discussed in this 

 paper), which is almost certainly Prochelyna heterodoxa, 

 Burm. (Erichson did not describe a species of the genus), and 

 it is certainly a Systellopid. 



I have already referred to the characters and position 

 of the Pachypodides in this present memoir under the heading 

 "Macrophyllides." This is the last of the subtribes of Melo- 

 lonthides known at present to inhabit Australia. 



RUTELIDES (Second Tribe of Melolonthides). 

 The essential characters distinguishing this Tribe from 

 the other Tribes of Melolonthides are shown in a tabular state- 

 ment in a former paper of this series (Trans. Roy. Soc, 

 S.A., 1905, p. 276). The Rutelides are fairly numerous in 

 Australia, and include many of our largest and most beauti- 

 fully coloured Melolonthid species. I do not, however, pro- 



