APPENDIX. 355 



Inhabits Missouri and Prairie du Chien. 



9 Body black ; front witli a whitish spot surrounding 

 the base of each antennae ; antennse black-brown, three 

 basal joints and labrum ferruginous ; thorax with two ab- 

 breviated, whitish, longitudinal lines before the middle, a 

 pale yellowish line on the collar, another over the wings, 

 passing round behind above the scutel, a double line be- 

 neath the scutel, and an oblique sagittate spot each side 

 on the metathorax, also pale yellowish ; wings a little fuli- 

 ginous ; /ee^ rufous ; thighs blackish in the middle; ter- 

 gum velvet-black ; first segment with an angulated lunula 

 on each side, and a subterminal band on each of the three 

 following segments, of which the first is very slightly in- 

 terrupted ; terminal segment with a slight, oblique, cine- 

 reous spot each side. 



% Anterior half of the thorax with much of the pale 

 yellowish colour ; bands of the tergum larger than those 

 of the female and one more in number, feet nearly all 

 blackish. 



Length half an inch. 



Smaller than E. A-fasciatus, nobis, but much larger than 

 E. mercatus, Fabr. 



2. E. scutellaris. Thorax surrounded by ferruginous ; 

 posterior spines dilated. 



Inhabits Middle States. 



9 Body deep black, densely punctured ; front with a 

 white spot surrounding the base of each antennas ; anten- 

 nae black-brown, three basal joints and mandibles rufous ; 

 thorax with the collar, obsolete line over the wings, dilated 

 posterior teeth and scutel, ferruginous ; wings dusky on 

 the terminal margin ; feet rufous ; tergum black-brown ; 

 two distant bands on the first segment, of which the first 

 is obsolete, and the other is interrupted in the middle, se- 



