LONG S SECOND EXPEDITION. 201 



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; carina on its concave portion white, and a 

 white oblique band from behind the middle of the back to the 

 exterior edge nearer the tip ; tip obtuse, hardly surpassing the 

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

 a fuscous, coriaceous, punctured basal margin extending more 

 than half the length of the wing ; a fuscous, punctured scale ad- 

 justed in an emargination of the edge of the thorax ; beneath pice- 

 ous-black ; knees, tibia, and tarsi, yellowish. 

 Length one-fifth of an inch. 



Var. a. Thorax ferruginous or whitish, black or fuscous before 

 and behind. 



This species is also an inhabitant of Missouri and Arkansa. 

 4. M. binotata. — Thorax with a compressed horn extending 

 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 projecting 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 [302] inferior carinae are three elevated 

 lines converging towards the eye ; superior carina of the horn 

 continued upon the back to the tip ; lateral carina of the horn 

 continued upon the side to the middle of the thoracic edge ; 

 carina of the back slightly undulated, with two yellowish spots, 

 of which one is on the middle and the other near the tip smaller 

 and placed nearer to the anterior one than its own length ; tip 

 acute ; anterior and intermediate tibiae dilated, foliaceous ; pos- 

 terior tibia with two serrated lines behind ; hemelytra opaque, 

 much longer than the abdomen ; wings hardly longer than the 

 abdomen. 



Length including the horn seven-twentieths; exclusive of the 

 horn more than one-fifth of an inch. 



The eyes are very nearly equidistant between the tip of the 

 horn and of the hemelytra. It very closely resembles the Ian- 

 ceolata Fabr. an inhabitant of South America, of which it may 

 possibly prove to be a variety. 



