102 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



in the U. S. National Museum are from the following localities: 

 Kansas (Topeka), Iowa (Lake Okoboji), North Dakota (Devils Lake). 



Meligethes pinguis Horn 



No additional example of this species has been recorded beyond the 

 unique type from southern Newfoundland in the LeConte collection. 

 It was considered by Horn to be allied to the Palaearctic M. (Acantho- 

 gethes) brevis Sturm, though Parsons found it "well within the range 

 of variation" of his own series of M. {A.) fuscus Olivier. 



Key to the Nearctic species of Meligethes 



1. Tarsal claws toothed at base; anterior margin of clypeus somewhat deeply 



emarginate pinguis Horn 



Tarsal claws simple; anterior margin of clypeus truncate or only feebly emargi- 

 nate 2 



2. Elytra metallic greenish or bluish green 3 



Upper surface entirely black or nearly so, not metallic 4 



3. Form less convex ; punctures of elytra as large as eye-facets, separated by 1 to 



V/i diameters; color darker, including legs, and less shining. 



rufimanus LeConte 

 Form distinctly more convex; punctures of elytra slightly larger than eye- 

 facets, separated by 2)i diameters; color lighter, including legs, more 

 shining simplipes Easton 



4. Length 3-4 mm.; explanate side margin of pronotum exhibiting a reddish 



translucency; surface of elytra finely transrugose; outer edge of front tibiae 



evenly, finely crenulate; legs pale reddish yellow atratus Olivier 



Length 1.5-2.8 mm.; pronotum unicolorous; elytra not transrugose; outer edge 

 of front tibiae with small irregular denticulations, or strongly serrate . . 5 



5. Anterior tibiae strongly serrate; upper surface between the punctures smooth; 



legs black; size larger, length, 2-2.8 mm saevus LeConte 



Anterior tibiae finely, slightly irregularly denticulate; size smaller, length, 

 1.5-2.3 ram 6 



6. Upper surface between the punctures smooth; legs pale pitchy yellow; male 



with a polished transverse depression at the apex of the last ventral segment. 



nigrescens Stephens 



Upper surface between the punctures finely microscopically reticulate; legs 



black when mature; last ventral segment of abdomen without male secondary 



sexual characters canadensis, new species 



