226 
SYSTEMATIC ARRANGEMENT. 
B. PETIVERIANA. 
Plate VII. Fig. 2. 
Linn. Fair. — Blatta heteroclita, Pallas , Spec. Zool. — StoWs 
Blattes, PI. 5. d. figs. 21,22. — Cimici affinis niger. — Petiv. 
Gazop. PL 71, fig. 1. 
It is about ten or eleven lines in length, and of a 
dull black colour ; antenneo about half the length of 
the body. The tegmina, when closed, overlap each 
other, and the upper one has four large spots of yel- 
lowish white, three placed longitudinally along the 
exterior border, the fourth smaller, and situate near 
the middle of the inner margin. The other wing 
case has only the three exterior spots, the central 
portion of the inner margin being of a fine reddish- 
yellow. The wings are very short, and seem scar- 
cely fitted for flight. The abdomen above is rather 
wider than long ; the colour black, with a small 
triangular fulvous spot at the side of each segment, 
and two small lateral appendages behind. Under- 
side and legs black. 
This insect, which is a native of the West Indies, 
was first figured by Petiver, one of our oldest Bri- 
tish Naturalists, after whom it has been named. 
Fam. Mantid^x 
This curious and interesting group will be easily 
recognised by the following summary of its most 
characteristic features. The head is long, triangular, 
and vertical, furnished with large eyes, (sometimes 
having a triangular prolongation in front,) and three 
