282 H. C. FALL. 



1 Elytra iinifornily green, or piceous, with distinct greenish or bronze lustre, 



the lateral margin often narrowly pale 10. 



10. Prothorax with disk in great part impunctate; elytra piceous; deeply but 

 not conspicuously bronzed ; clypeal suture broadly deeply impressed. 



sulcata. 



Prothorax with disk in great part punctate 11- 



1. Outer spur of hind tibia in the male but little wider than the inner ; elytra 

 in the male piceous; more or less bronzed or dark green. 

 Clypeal suture feeble or indistinct; the elytra in the female often of a 

 brighter green than in the male, but otherwise usually rufous or tes- 

 taceous throughout vali«la. 



Outer spur of hind tibia in the male more conspicuously wider than the 

 inner ; elytra brilliant green in both sexes vicina. 



1. D. elongata Fab. 



This is by far the commonest species in New England, whence it 

 ranges north into Canada, south through New Jersey and Pennsyl- 

 vania, and as far west as Kansas, though its occurrence there is 

 very exceptional. I have seen a specimen labelled "Tex" in Mr. 

 Fuch's collection — possibly an error. The beetles have been re- 

 corded as occurring on different species of Salix (Kirby), on various 

 oaks (Bethuue), on leaves of oak in May in Southern Michigan 

 (Townsend), and on birch in June (Packard). I have taken it 

 abundantly on pines in July in New Hampshire and Massachusetts. 



2. D. canadensis Horn. 



This species is quite unknown to me, nor do I know if there are 

 any in collections besides the type. , 



3. D. snbvittata Lee. 



This species has about the same range as elongata, but is certainly 

 more common farther north. I do not know that it has been taken 

 in southern New England, nor does Smith include it in the New 

 Jersey list. It occurs in northern New Hampshire and is common 

 about Montreal and thence west to the Great Lakes. It is not rare 

 at Duluth, Minn. (Daggett), and I have seen specimens from 

 •Northern Illinois, and one from Eastern Nebraska. Hamilton 

 records it as common, especially on hazel, near Pittsburg. 



It seems not to have been noticed that the inner spur of the hind 

 tibia in the male is a little wider and obtusely rounded (subspatu- 

 late) at tip. A similar disparity exists in males of fuscula and 

 diluta, and though subject to some individual variation, is obvious 

 enough when a sufficient series is examined. 



