MONOGRAPH OF THE GENUS SAPERDA 



59 



distinct and not even closely related. It is longer in proportion 

 to its width than t r i d e n t a t a . The sides are parallel, while 

 in tridentata the humeral angle is quite pronounced. The 

 first crossbar is oblique, there are no spots on each side of it, and 

 the spot is also lacking behind the apical crossbar ; it also wants 

 the subniarginal carina present in tridentata, which has the 

 first crossbar at right angles. The pygidium of the female is 

 broader at the top, and the sides make a wider angle than that 

 of tridentata. 



Distribution. This species has been received from Montreal 

 Can.; and Mr Fred Blanchard has taken a specimen at Tyngs- 



Fig. 5 Last dorsal segment and apex of elj'tra of S. tridentata (a) and S. i m i t a n s (/') 



boro Mass. Mr Roland Haywood has taken it near Boston ; 

 specimens have been seen from Virginia, Michigan, Pennsylvania 

 and Wisconsin ; and we have bred it from New York city and vicinity. 



Saperda lateralis Fabr. 

 Red-edged Saperda 



This species is about the same size as S. tridentata Oliv. 

 and like it occurs in elm. Its principal food plant is hickory, 

 on which it is partial to injuries near the roots and to the base of 

 sprouts on recently cleared lands. It is rarely abundant enough, 

 however, to cause serious injury. 



Life history. Comparatively little has been published con- 

 cerning the life history of this species. The beetles may be 

 taken in June in northern localities, and, like most other Saperdas, 



