APPENDIX. 301 



3. M. concava. Fuscous with elevated lines on the tho- 

 rax, and an oblique white band behind. 



Inhabits North-west Territory. 



Body with dilated punctures j head inequal, varied with 

 whitish and fuscous ; tip a little more prominent in the 

 middle ; thorax unarmed, rounded before, with a carina 

 originating at the head and continued to the tip ; elevated 

 lines like nervures, which are reticulate on the anterior 

 part and near the back, but on the sides they are distinctly 

 four or five in number ; back over the origin of the wings 

 a little concave ; anterior or front of the thorax pale ; ca- 

 Tina on its concave portion white, and a white oblique band 

 from behind the middle of the back to the exterior edse 

 nearer the tip ; tip obtuse, hardly surpassing the hemely- 

 tra ; hemelytra dull amber, dusky at tip j nervures brown ; 

 a fuscous, coriaceous, punctured basal margin extending 

 more than half the length of the wing ; a fuscous, punctur- 

 ed scale adjusted in an emargination of the edge of the 

 thorax ; beneath piceous-black ; knees, tibia, and tarsi, 

 yellowish. 



Length one-fifth of an inch. 



Var. «. Thorax ferruginous or whitish, black or fuscous 

 before and behind. 



This species is also an inhabitant of Missouri and Ar- 

 kansa. 



4. M. binotata. Thorax with a compressed horn ex- 

 tending above the head, and two spots on the back. 



Inhabits United States. 



Body fuscous, punctured ; head longer than broad, 

 rounded at tip, minutely punctured ; thorax with a pro- 

 jecting horn before, which rises high above the line of the 

 back, compressed, carinated above, each side, and beneath, 

 •and incurved towards the tip ; between the lateral and in- 



VoL, II. 39 



