BEMBIDIIN^E 1 1 



breviated, being only about a fourth wider than long; elytral 

 intervals differing in being very convex throughout, especially 

 toward base, the similarly green punctures rather coarser. Length 



(9 ) 6.2 mm.; width 2.5mm. Ohio aeneorubrum n. subsp. 



B General structure and coloration throughout as in confiisnm and 

 the preceding, but shorter and relatively broader, not so convex 

 as the preceding; head and eyes relatively still larger; prothorax 

 but little wider than the head, two-fifths wider than long; elytra 

 relatively much broader, not quite one-half longer than wide and 

 fully one-half wider than the prothorax, differing also in being 

 somewhat broadened basally; punctures and feebly convex inter- 

 vals as in confusiim. Length (9) 6.0 mm.; width 2.6 mm. 



Michigan (Marquette), Sherman marquettense n. subsp. 



Strial punctures very coarse and so closely crowded as to be transverse 

 in form; body deep black, not metallic above, greenish beneath; in- 

 tervals laterally not so wide as the striae sculpturatum Mots. 



4 Elytral striae fine, very finely punctate; body very stout and convex, 

 obscure aeneous above, black beneath, the legs in great part dark 



rufous robusticolle Hayw. 



Elytral striae coarse and strongly punctate; body less stout and not so 



convex; legs testaceous, with blackish femora 5 



5 Prothorax notably short and transverse venator nov. 



Prothorax much less transverse 6 



6 Elytral striae deeply impressed at apex snowi nov. 



Elytral striae shallow at apex 7 



7 Elytra somewhat inflated basally; side margins of the prothorax dis- 

 tinctly reflexed from base to apex coxendix Say 



Elytra parallel; side margins of the prothorax not reflexed apically; size 

 smaller, the outline narrower vigilans nov. 



The tvvo forms noted above under confusum (nitidulum Dej.) dif- 

 fer a good deal in appearance from that species, but in view of the 

 general similarity in structure and coloration, and in the peculiar 

 long truncate and feebly tapering or subparallel tooth of the mentum, 

 had better appear as subspecies, for the present at least. The 

 elytral intervals in confusum are nearly flat, but in the male become 

 somewhat convex, as shown by my series from Indiana and Iowa; 

 the great convexity of the intervals in aneorubrum is a striking 

 feature and, with the longer prothorax, engages the attention at 

 once. The relatively wider head and narrower though transverse 

 prothorax and broad elytra, are distinctive features of marquettense. 



Of coxendix I have representatives from St. Louis and from Keo- 

 kuk, Iowa; its dimensions are 4.8-6.0 by 2.0-2.4 mm - The elytral 

 intervals vary from nearly flat to moderately convex, more strongly 

 laterad in the latter case; it is of a bright bronze above, sometimes 

 with narrow green side margins. 



