140 



=species sent to me by Mr. OllifFe for inspection, in which the yellow 

 elytral margin is absent. This agrees with Boisduval's descrip- 

 tion. Suffrian (Mon. XIII., p. 103) seems to think that the 

 yellow margin was accidentally overlooked by Boisduval, and re- 

 describes the insect as having it. In all other respects the exam- 

 ple I am referring to seems to agree with specimens having the 

 yellow border. 



EDUSA. 



This genus was originally formed by M. Chevrolat, and pub- 

 lished in M. Dejean's Catalogue (1837), but M. Lefevre in 1885 

 proposed to substitute Edusia, on the ground that Edusa was a 

 nom. prseocc, having been used by Albers in 1860 for a genus of 

 Mollusca. It is difficult to understand the reason of this proposal, 

 especially as Edusa was recognised and in use in the Coleoj)tera 

 before 1860 by others than its author, M. Bohemann, for example, 

 having used it in 1858 for species that M. Lefevre now calls 

 Edusia. The species attributed to the genus differ considerably 

 inter se in respect of facies and structure, in consequence of 

 which Dr. Chapuis in 1874 (Gen. Col., vol. X.) proposed to adopt 

 three names — Edusa, Edusina, and EduseUa — as marking three 

 subgenera of Ediisa. I do not think that this subdivision can be 

 maintained, at any rate unless a number of other subgenera be 

 added ; I have a large number of species before me, not half of 

 which will fit exactly into any of those Dr. Chapuis characterised. 

 I shall therefore not attempt to apportion any of the new forms 

 among subgenera beyond remarking that the first six evidently 

 would fall into the subgenus Edusa, and that E. (Hiiea and minor 

 might probably fall in Edusina. E. suturalis, Chap., is the only 

 species I have seen that agrees with the description of EduseUa. 

 The " Groupe Edusites^' of Chapuis is characterised among the 

 Eumolpidoi by the following in combination : — Prosternal epi- 

 sterna convex in front, elytra transversely wrinkled. In this group, 

 Edusa was the only Australian genus known to Dr. Chapuis, and 

 he separated it from those of other countries primarily by its being 

 pubescent. The Rev. H. Clark had, however, characterised 

 two other genera — Thaumastomerus and Ocnus — from N.W. 

 Australia, but in such terms that Dr. Chapuis could not satisfy 

 himself even as to the "groupe" in w^hich they should be placed ; 

 he could see no reason, however, to say that they might not be 

 merely somewhat aberrant species of Edusa. It should not be 

 overlooked, nevertheless, that Dr. Baly has since appeared to re- 

 cognise Ocnus as a good genus, having attributed to it a new 

 species from N.W. Australia. I have not seen any Edusites from 

 N.W. Australia, or any species that seems to me likely to be- 

 long to either of the Rev. H. Clark's genera if they are distinct 

 from Edusa. In 1885 M. Lefevre formed a new^ srenus of 



