64 Coleopterological Notices, III. 



though the mere fact that one form is winpfed and the other wing- 

 less ought to be sufficient ground for specific isolation, especially as 

 it is highly probable that the more or less extended time necessary 

 to bring the winged continental form to the wingless insular condi- 

 tion, will generally be sufficient to develop other specific difTereuces 

 At all events the wingless island form must always be considered 

 an incipient species or variety, for this kind of isolation has been one 

 of the most potent factors in the differentiation of species as we now 

 understand them. 



COI^IBIOSOIWA Cas. 



The following species bears but little external resemblance to 

 elongata, but as the prothorax is strongly fimbriate, the body appa- 

 rently apterous, and the anterior tibisB slender, it must either be 

 placed here or in a new genus : — 



C lacilliata n. sp. — Moderately slender, obloiig-suboval, densely punc- 

 tate anteriorly but rather shining ; body black throughout, the legs rufous, 

 the antennae dark piceo-rufous ; pubescence rather dense, moderately long, 

 nearly as in Blapstinus, very coarse, rigid, semi-erect and black, not very 

 conspicuous. Head short and broad, broadly, feebly sinuate at ajjex, rather 

 coarsely, very densely and deeply punctate ; eyes moderately large, the upper 

 lobe elliptical ; antennre long, about as long as the head and prothorax, stout, 

 clothed throughout with long stiff black setse, the outer joints gradually, feebly 

 incrassate and distinctly transverse, the eleventh narrower than the tenth, 

 the third long, equalling the next two combined. Prothorax about one-third 

 wider than long, the apex as wide as the base, transversely truncate, the base 

 broadly arcuate, not appreciably sinuate toward the basal angles which are 

 obtuse but not rounded ; apical slightly obtuse, not rounded ; sides broadly, 

 almost evenly arcuate ; disk widest near the middle, evenly convex, rather 

 coarsely, very deeply and extremely densely punctate throughout, the side 

 margins with a dense fringe of long erect stiff setse. Scutellum triangular, 

 entering the disk of the elytra, densely punctate. Elijtra about two and one- 

 half times as long as the prothorax, and, in the middle, nearly oue-fourth 

 wider than the latter, fully three-fourths longer than wide, obtusely para- 

 bolic at apex ; sides parallel, very feebly arcuate ; humeri slightly exposed at 

 base ; disk with rather coarse, feebly impressed series of somewhat coarse, 

 deep, moderately close-set punctures, the intervals feebly convex, shining, 

 extremely minutely, rather sparsely and confusedly punctate. Abdomen rather 

 finely, but deeply and densely punctate, broadly, deeply impressed in the 

 middle in the male. Legs rather slender, the hind tarsi with the basal joint 

 subequal to the next two and very much shorter than the last. Length 4.G-5.0 

 mm.; width 1.8-2.1 mm. 



