372 PROCEEDINGS OF THE ACADEMY OF 



mens the inflexed margins are slightly tinged with dark reddish brown, as 

 mentioned in the remarks of Mannerheim under the second reference. Two 

 specimens {(^ 9 ) from Labrador, are much smaller, only 5-25 mm. long, but 

 do not seem to differ in any other respect; var. b, of the last reference, is 

 probably a distinct species, but I have seen no specimen to correspond with it. 

 at. A race of this species is represented by four specimens from Lake Supe- 

 rior, which resemble in appearance the t3'pical G. ptcipes, but differ only by 

 the apical crescentic oval curve of the elytral being composed of larger punc- 

 tures. This differs from the others of the same group (except pernilidtis) 

 by the more elongate form, more highly polished surface, and more brilliantly 

 bronzed suture, margin and punctures; G. pernitidus is more highly 

 polished, but has the elytral rows composed of less approximate punctures ; 

 G. b or e a 1 i s is larger and stouter than the two species in question, though 

 otherwise resembling them very closely. 



15. G. opacus Sahlberg, Ins. Fenn., 47; Schiodte, Naturhist. Bidrag. 

 Gronland, p. 54 ; G. leneus Aub^, Hydroc. 690, (fide Redtenbacher). Mr. 

 Drewsen, of Copenhagen, has kindly sent me three specimens of this species, 

 with a very complete series of the other Coleoptera of Greenland. G. ecneus 

 Kirby, Fauna. Bor. Am. iv, 80, must according to the size given (2 4-5th lin.) 

 be a much larger species, which is unknown to me, unless it be G. borealis. 



16. G. b o r e a 1 i s ^wi^, Hydroc. 692. New York to Lake Superior; the 

 distinguishing characters of this have been sufficiently pointed out in the re- 

 marks upon other species. 



17. G. p e r n i t i d u s. The type of this species is a single 9 from Georgia; 

 with it I have associated two other females sent me by Dr. Harris, as No. 242, 

 analis? Say; one of the specimens agrees perfectly with the type, while in 

 the other the punctures of the rows of the elytra are much less approximate, 

 the inner rows less strongly marked, and the last ventral segment nearly 

 black, instead of ferruginous, as in the type ; it is probably a distinct species, 

 and is perhaps a small specimen of G. Sayi Aube, 698, which is otherwise 

 unknown to me. 



Dr. Zimmermann determined this as G. borealis, but the size given in the 

 description of Mr. Aube (7 mm.) represents a larger speices, and I have 

 accordingly referred it to the preceding. 



18. G. lugens Zimni. MS. New England and Lake Superior; easily 

 known by the larger and stouter form, similar to G. borealis, but not at all 

 bronzed above. 



19. G. a n a 1 i s Sat/, Trans. Am. Phil. Soc, ii, 108 ; ed. Lee. ii, 520 ; ibid, 

 iv, 448, ed. Leo. ii, 562 ; Aub^, Hydroc. 697. Louisiana to Lake Superior, 

 easily distinguished by the upper surface uniformly bronzed ; the under sur- 

 face black bronzed, with the last ventral segment and feet ferruginous ; the 

 form is narrower than in the other species of this group, except G. opacus, 

 which is, however, less oval and more narrowed behind. 



20. G. p e c t o r al i s. Lake Superior and Hudson Bay Territory, (Fort 

 Liard). 



21. G. gibber Zimm., MS. I have seen but the single specimen of this 

 peculiar species found in North Carolina by Dr. Zimmermann, from whose 

 MS. I have translated the description; this unique specimen was kindly 

 given to me by Dr. Samuel Lewis. 



Bibliography and remarks. 



22. G. m in u t u s Fabr., Syst. El. i, 276 ; Kirliy, Fauna Bor. Am. iv, 81 ; 

 Aub^, Hydroc. 683. Lake Superior, abundant. I have omitted much of the 

 European synonymy of this species, as not applicable to our fauna; it is, 

 however, necessary to observe that the fine carina of the scutellum which 

 distinguishes this and the next, so far as I know, from all others of the genus 



[Dec. 



