AMERICAN COLEOPTERA. 189 



In the Bullet. Ent. Soc. Fr. 1881, No. 17, p. U8, M. Abeille de 

 Perrin presents a good argument for the union of Trechus and Anoph- 

 thalmus. The series of species in our fauna is too small for me to 

 express any opinion, but from the ability shown by M. Abeille in more 

 difficult observations I have no doubt he is entirely correct. 



While I would be willing to accept the idea above indicated I am 

 not prepared to coincide with those who would unite Anillus with 

 Bembidium on the ground that these bear the same relation to each 

 other that Trechus and Anophthalmus do. Through the kindness of 

 Dr. Dohrn I have been enabled to study iScotodipnua ( Microtyphlus), 

 and as it did not appear to present anything of special moment for 

 a general essay, its closer examination w;is deferred until the present 

 time. The upper surface presents no peculiarities of moment except 

 that I do not find the elytra truncate as stated by Linder, (Ann. Ent. 

 Soc. Fr. 1863, p. 483, pi. ix, fig. 7). The u.sual setae of the Bembidiini 

 are present and that on the mandible well marked. On examining the 

 under side, which I had omitted to do at first, I was surprised to find 

 the' posterior cozee rather wideli/ separated. In Anillus the same 

 character exists, while in Anophthalmus the posterior coxae are con- 

 tiguous as in ordinary Trechus. This structure is certainly a valid 

 generic difference and whatever course is taken with Anophthalmus 

 the other two genera must remain. Notwithstanding the small size 

 of Scotodipnus I have observed the internal elytral plica of the Bem- 

 bidiini, feeble of course, but quite as distinct as in some Tachtjs. 



In my "Synopsis of the Silphidae," i^ Trans. Am. Ent. Soc. 1880), 

 I have directed attention to the fact that all tlie eyeless genera have the 

 posterior coxae separated, but I am not able to explain the correlation 

 of these distant members of the body. 



Corrections. 

 Page 103, line 14 from bottom, for "exceptions" read "exception." 

 Page 110, line 4 from bottom, omit the words "if not all." 

 Page 130, on the first line of larger type, after "represented" add 



" in our fauna." 



Page 142, in the first synoptic table, for " Perigoni" read " Perigonae." 

 Page 144, line 10 from top, for ".striated" read "situated." 

 Page 161, line 18 from bottom, for "narrower" read "narrow." 

 Page 165, line 16 from top, for " six" read " five, ' and add Zabrini 



after A po to mini, (in next line). 



Page 176. line 9 from top, for "position" read "po.sitions." 



(4;^) 



