Atlantic Coleoptera. 231 
(Sp. 279) Acrotrichis Montandonii. 
From the synonymy of this Madeiran Acrotrichis the 
first two lines must be erased, for Mr. Matthews (who 
originally identified it with the European A. Montandonii) 
now informs me that he is inclined to accept the opinion 
of Motschoulsky—who has recently cited (I will not say 
described”) it, under the name of “nigricornis,” as 
distinct from that species. Until Mr. Matthews’ Mono- 
graph shall have made its appearance I will not presume 
to say what its exact differential characters may be, or 
how it is undoubtedly separable from the A. Montandonii ; 
but, acting on the step taken by Motschoulsky (and 
subsequently endorsed by Mr. Matthews), I will merely 
call attention as follows to the change in the synonymy, 
—adding also that I find an example in my possession 
which was captured by myself on one of the other 
islands of the Madeiran archipelago, namely the Deserta 
Grande. 
Acrotrichis nigricornis. 
Acrotrichis pumila, Woll. [nec Erich.], Ins. Mad. 109 
(1854); Id., Cat. Mad. Col. 35 (1857). Acrotrichis in- 
sularis, Id. [nee Mann.], Ann. Nat. Hist. viii. 109 (1861). 
Acrotrichis Montandonti, Id. [nec Allib.], Col. Atl. 99 
(1865). <Acrotrichis nigricornis, Mots., Bull. Mose. 174 
(1869) [sec. Matthews]. 
Hab.—Maderenses (Mad., Des.) ; hine inde in sub- 
inferioribus intermedusque, inter quisquilias. 
I should add, perhaps, that Motschoulsky’s “ descrip- 
tion”? of it is as follows: ‘‘ Taille, forme et couleurs de 
la depressa, Gillm., mais plus convexe, plus Iuisante, 
corselet large postérieurement, avec ses angles p. un peu 
aigus et saillants, antennes enticrement foncées méme 
leurs prémiers articles, pas plus longues que le corselet, 
élytres paralléles.” 
(Sp. 280) Acrotrichis Guerinii. 
This Acrotrichis was defined by myself in 1857, as the 
““obsceena”’—a title, however, which I was compelled 
subsequently to sink into a synonym on account of the 
species having been identified by Mr. Matthews with the 
R 2 
