Mr. T. V. Wollaston on Additions to Madeiran Coleoptera. 109 



that we may look hereafter for occasional additions from the 

 ranks of the ordinary European Coleoptera (such as the smaller 

 Staphylinidte, and other more or less mundane forms) of easy 

 diffusion. But, be this as it may, there seems good reason to 

 believe that no considerable number of truly indigenous species 

 can have now escaped our combined observations ; and that 

 consequently, if we choose (allowing a small margin for future 

 introductions) to estimate the Madeiran Coleoptera at, ore ro- 

 tundo, somewhere between 650 and 700 species, we shall proba- 

 bly advance a tolerably correct opinion as to the actual extent of 

 that department of the fauna. 



Before concluding this short paper, I may just call attention 

 to the few following facts : — 



1. My friend Dr. Schaum, of Berlin, thinks that the common 

 Madeiran Parnus may possibly be distinct from the universal 

 P. prolifericornis, as being " a trifle smaller and shorter, with 

 its pubescence a little more brown, and its elytra more sparingly 

 and coarsely punctured •" but, after comparing it very carefully 

 with British specimens of that species, I must confess that I 

 cannot detect any appreciable difference between the two, unless 

 it be that the Madeiran one is perhaps, on the average, not quite 

 so large. 



2. Acratrichis pumila (Ins. Mad. 109). — The Rev. A. Matthews 

 informs me that this insect cannot properly be referred to the 

 T. pumila of Erichson, but that it is more akin to the European 

 T. brevipennis, from which it nevertheless differs in being rather 

 larger, more shining, and more coarsely punctured. In the 

 dilated joints of its anterior tai'si it approaches both of those 

 species; but, apart from other characters, the shape of the joints 

 is, according to Mr. Matthews, quite different. I would propose 

 for it, therefore (having already described it), the specific name of 

 insularis. 



3. Microchondrus (i.e. Symbiotes) domuum (Ins. Mad. 197). — 

 This is clearly identical, as Mr. Janson has pointed out to me, 

 with the Symbiotes pygmceus, Hampe. 



4. The six Ptini (Nos. 200-206) which I indicated in the 

 1 Ins. Mad./ in 1854, under the subgeneric title of Sphcericus, 

 and subsequently (in 1857), in my 'British Museum Catalogue/ 

 under that of Trig ono genius, Solier (as being the older name), 

 must be regarded as generically distinct from the Ptini proper, 

 and be quoted as Spharici, since M. Jacq.-Duval has lately in- 

 formed us (vide 'Genera des Col. d'Europe/ iii. p. 211) that he 

 has examined the true Trigonogenii, from Chili, and finds them 

 structurally different from the Madeiran and Mediterranean in- 

 sects. M. Duval, indeed, proposed last year (Glanures Ent. 137) 



