HETEROPTEROTJS HEMIPTERA. 365 



Savannah and it is found in Pennsylvania and in Indiana and 

 Louisiana. 



Var. a. immaculata. Much smaller ; lateral margin of the 

 thorax depressed and slightly reflected ; feet immaculate. 



Length half an inch. 



Most probably a distinct species, but I have seen but one spe- 

 cimen. 



As the large North American species does not appear to have 

 been noticed, I will add a description of it. 



[Previously described as B. Boscii Serv. Enc. Meth. 10, 273 : 

 Zaitha Boscii Amy ot and Serv. 430: Perihostoma auruntiacum 

 Leidy, Journ. Acad. Nat. Sc. Phil. 2d ser. 1, 62. It really 

 belongs to the latter genus, and not to Zaitha. — Uhler.] 



2. B. grisea. — Oblong-oval; head before the eyes very short, 

 not attenuated ; beneath with three blackish vittge. 



Inhabits United States. 



Body oblong-suboval, slightly wider behind the middle, gray- 

 ish-brown varied with fuscous or blackish, particularly on each 

 side of the disks of the thorax and scutel : head between the 

 eyes hardly tapering from the base to the tip : from the anterior 

 canthus of the eyes to the tip, shorter than broad, not narrowed : 

 [810] thorax, lateral edge rectilinear: pectus and postpectus 

 yellow, with three broad black vittae, which become more dilated, 

 brown and less obvious on the abdomen : feet obsolctcly suban- 

 nulate. 



Length two inches and one-fifth; greatest breadth less than 

 nine-tenths of an inch. 



Occurs in various parts of the Union. I received a specimen 

 many years since from Dr. F. V. Melsheimer labelled Nepa grisea^ 

 which name I retain. It differs from the preceding in magni- 

 tude, in the form of the anterior part of the head, &c. It is 

 much like the B. grandis Linn., but is hardly halt' as large, and 

 if Stoll's figure of that insect has any pretensions to accuracy, 

 it is in other respects quite distinct. In that figure the greatest 

 breadth is at the base of the elytra, &c. 



It inhabits from Canada to Florida. 



[Subsequently described as B. anmdipes II. Schaffer, 8, tab 

 258, fig. 803 and 804 : also as B. americamvm Leidy, Journ 



