DESCRIPTION. 



Body black: head dull ferruginous, with a 

 polished, impressed, black line at the base of the 

 antennae: antennse with a white annulation, be- 

 ginning at the seventh joint, and extending to 

 the seventeenth: thorax with the disk between 

 the anterior pair of wings, and the scutel, dull 

 ferruginous : tihise dull rufous, excepting at tip : 

 wings dusky violaceous. 



OBSERVATIONS. 



It occurs frequently in Pennsylvania, and as 1 

 have found it both in Missouri and the North- 

 western Territory, it appears to be a pretty 

 general inhabitant of the United States. 



The lower left figure. 



PLATE XXII, 



