364 HETEROPTEROUS HEMIPTERA. 



The femorata Beauv., is less dilated, polished, the head larger, 

 and less profoundly inserted into the thorax, the thorax is also 

 not marginally depressed and its angles are not obtusely rounded 

 as in this species. It was taken by Wm. Bennett and presented 

 to me by Mr. Maclure. 



2. N. stygica. — Black, front quadrilineate. 



Inhabits Georgia. 



Body oval, brown-black, rather rough : head crenate on the 

 front so as to form four denticulations : eyes rounded, rather 

 prominent : thorax not emarginate before, with a slightly de- 

 pressed margin behind ; anterior thighs dilated triangular : heme- 

 lytra with oblique lines ; they appear united at the suture. 



Length three-tenths of an inch. 



I have but one mutilated specimen which was sent to me by 

 Mr. Oemler. If I am not deceived by this specimen, the species 

 is apterous and the hemelytra are united by a rectilinear suture, 

 which will require the formation of a separate genus which may 

 be named Nerthra. [809] 



BELOSTOMA Latr. 



1. B. fluminea. — Fuscous; head before the eyes attenuated; 

 feet spotted. 



Inhabits United States. 



Body rather long ovate, grayish or fuscous : head rapidly 

 tapering from the anterior canthus of the eyes to the tip, form- 

 ing in that part an equilateral triangle, of which the tip is ob- 

 tuse, but less than one-fourth the breadth of the space between 

 the eyes : the anterior lobe or nasus hardly reaches the line 

 between the anterior canthus of the eyes : thorax a little emar- 

 ginate before, and less obviously so on each side ; posterior to the 

 transverse suture and a narrow lateral margin, paler : tibiae and 

 and tarsi each with three black spots or interrupted annulations. 



Length from seven-tenths to four-fifths of an inch. 



This species is no doubt related to B. mstica Fabr., but he 

 describes the thorax of that species as being white before. 

 Like that species, the female carries her eggs upon her back. 

 S toll's figure of the rustica represents it of a short ovate form. 

 It has not an extensive range. I purchased a specimen taken 

 New Haven, one was sent to me from Georgia by Mr. Oemler of 



