53 



elytra. I cannot help so far participating in tbe views expressed 

 by the Hon. W. Macleay (Trans. Eut. Soc, N.S.W., 1869, II., 

 pp. 58, &c.) touching the accuracy of Count Castelnau's obser- 

 vations as to feel some misgivings in distinguishing this species 

 from his E. Icevis, but nevertheless it is certain that if the 

 description of Tl. Icsvis is accurate, the present insect is not 

 identical with it, and if it is inaccurate a new description is re- 

 quired even at the risk of supplying a name that will not stand. 

 It will be observed also that the location of this species in 

 Eutoma is inconsistent with the thoracic characters attributed to 

 that genus, but nevertheless it is certain that E. Adelaidce can- 

 not be generically separated from the species previously attri- 

 buted to Eutoma. I should, perhaps, add that the serial mar- 

 ginal punctures of the elytra are placed in E. Adelaiclcd as 

 follows on each elytron : — Two on the external portion of the 

 anterior margin, six on the anterior third part of the lateral 

 margin, two close to the apex, and three at wide intervals on 

 the intermediate portion; exterior ridge of anterior tibiae with 

 two teeth above the large apical ones, neither of which is visible 

 when the tibia is viewed from perpendicula-rly above it ; the lower 

 one is small, and placed on the hinder declivity of the upper 

 large tooth ; the upper one is scarcely discernible except by 

 its seta ; the inferior ridge bears three small teeth. 



Eecently added to the South Australian Museum ; taken at 

 Ashton, near Adelaide, by Mr. Co]oeland. 



A recent study of the anterior tibia of a number of the 

 species forming this genus has satisfied me that some of the 

 expressions ordinarily used in describing the denticulation of 

 that limb are wanting in accuracy, and that a thorough in- 

 vestigation of the matter might be of great assistance in deter- 

 mining the limits of closely allied species, or even in the 

 arrangement of genera. Unfortunately the material at my 

 command is not sufficient for such a purpose, but I am per- 

 suaded it would be well worthy the attention of some specialist 

 in the genus who was in a position to examine a long series of 

 species. If the p^nterior tibia of a Carenum be carefully 

 examined it will be found that the central apical portion of the 

 under surface consists of a flattened or concave space which 

 terminates in a point of various shapes, the said pointed por- 

 tion forming the lower portion of the cavity into which the 

 tarsus is inserted. I shall call this the "apical plate" of the 

 tibia. The inner edge of this plate if followed is seen to con- 

 sist of a smooth ridge {i.e., smooth in all the species I have 

 examined), which passes up the tibia, encircles the upper in- 

 ternal spine of the tibia, and then turns downwards towards 



