260 CALIFORNIA ACADEMY OF SCIENCES. [104] 



equal in diameter and closely connate or anchylosed; in 

 most cases the suture is completely obliterated so that they 

 appear to form but a single joint; the last joint is very long 

 and slender, affixed very obliquely and is generally slightly 

 longer than the first two together. The posterior tarsi are 

 of rather peculiar structure; the first joint is fully as long 

 as, sometimes distinctly longer than the next two together, 

 the latter being equal in length and each distinctly shorter 

 than the fourth; the fifth is generally longer than the first. 



If the words "elytfis brevissimis" are to be accepted in 

 their ordinary meaning, the genus of the Atlantic Islands 

 must be remarkably different in appearance, since the elytra 

 in Colusa are unusually long, wide and well developed. In 

 the description of the single species of Echidnoglossa, Wol- 

 laston states that it is alutaceous, scarcely punctulate, and 

 sparsely pubescent. In Colusa the integuments are not 

 alutaceous but polished, rather densely pubescent and 

 deeply punctate, the elytra very coarsely and conspicuously 

 so. 



The two genera are, nevertheless, allied by a very striking- 

 character which I have repeatedly verified in Colusa — the 

 pentamerous tarsi — and Colusa is evidently the American 

 representative of the eastern Echidnoglossa. I believe that 

 enough has been said, however, to show that they should 

 not be united without a much more careful comparison than 

 has yet been accorded them. 



II. 



The species described by me under the names Ilyobates 

 (Bull. Cal. Acad. Sci. I, p. 307) belong in reality to Bolito- 

 chara. By an unfortunate oversight the number of joints 

 in the tarsi was recorded erroneously; both these genera 

 possess the strongly elevated mesosternal carina. I am in- 

 debted for this rectification to M. A. Fauvel. 



