3 2 



APPENDIX. 



Canarian Group, of which perhaps it may be but a geographical 

 modification. It seems to differ from that insect, principally, in its 

 frontal costae being less decidedly evanescent behind, or more sharply 

 produced to the anterior margin of the prothorax; in the latter 

 being a little more thickly punctured, less convex on the disk, and 

 less deeply branded at the base; and in its elytral striae being 

 rather more lightly impressed. 



Fam. PTINID^E. 



Genus CASOPUS. 

 Wollaston, Trans. Ent. Soc. Lond. i. 194 (1862). 



Casopus pedatus, n. sp. 



C. dilaticolli similis, sed paulo major ; prothorace antice minus 

 denter dilatato ; elytris rnagis inflatis, antice et postice obtusi- 

 oribus, pilis erectis plerumque subdensius obsitis, distinctius sub- 

 striato-punctatis, costis 4 basalibus magis elevatis ; tarsorum 

 posticorum masculorum articulo basali magis inflate (sc. maximo). 

 Long. corp. lin. l|-2^. 



Habitat Gomeram, a DD. Crotch sat copiose repertus. 



Two examples of this Casopus were taken by Dr. Crotch in Gomera 

 during the spring of 1862 ; and although I drew attention in my 

 Canarian Catalogue to a few of the points in which they differed 

 from the ordinary Teneriffan ones, nevertheless on account of their 

 being females I had no opportunity of perceiving the much greater 

 development of the basal articulation of the two hinder feet of the 

 male which indeed is almost as conspicuously enlarged as is the case 

 even in the C. subcalvus from Hierro. Hence I thought it sufficient 

 just to mention that the characters which separated the Gomeran 

 insect from the C. dilaticolli^ were so few and unimportant (even 

 though at once appreciable) that I considered it would be unsafe to 

 record it as more than a " var. y " of that species. But more ex- 

 tensive material having since been obtained by Dr. Crotch and his 

 brother, during their late sojourn in Gomera, I am now able to 

 perceive not only that the features which had been already alluded 

 to are more pronounced and constant than I had anticipated, but 

 likewise that the first joint of the posterior tarsi of their male sex 

 is so very much more inflated that I think we must of necessity 

 regard this Gomeran Casopus as truly and specifically distinct from 

 its Teneriffan ally. 



