Mic r gscopicae Essay s . 389 



Fig. 1, Plate XX. is a beautiful infect of the hemiptera clafs-, 

 ©r that kind where the elytra are only in- part cruflaceous, and 

 which do not form a longitudinal future down the back, but fold 

 over about one-third of their length towards the bottom, where 

 it is alfo partly tranfparent. It is of the genus cimex, and called 

 ftriatus by Linnaeus. It cannot boaft a variety of colours, though 

 what it has are bright and. elegantly difpofed : the head, probofcis, 

 and thorax, are black. The thorax is ornamented with, yellow 

 fpots, the middle one large, and occupying almoft one-third of 

 the pofterior part ; the other two are on each fide, and tri- 

 angular. The fcutellum has two yellow oblong fpots, pointed at 

 each end ; the ground of the elytra is a bright yellow, fpotted and 

 ftriped, with black. The nerves are yellow, and, there is a 

 brilliant triangular fpot of orange, which unites the cruflaceous 

 and membranaceous parts ; the latter is brown and clouded. The 

 feet are of a fine red, and the rings of the abdomen are black, 

 edged with white; This pretty infect is to be found in June, 



upon the elm-tree. It is reprefented at A of the natural fize. 



. / ' 



Plate XX. Fig. 2. 



Avery common, though elegant, infed of the coleoptra clafs, 

 is reprefented as feen in the lucernal microfeope, and of it's natu- 

 ral fize at B ; it is called by Linnaeus chryfomela afparagi, from 

 the larva feeding on the leaves of that plant. It's figure is oblong, 

 the antennae black, compofed oftmany joints nearly oval. The 

 head- is a bright but deep blue, th| thorax red and cylindrical, the 

 elytra blue, with a yellow margirj| with three fpots of the fame 

 colour on each, one at the bafijf- of an oblong form, and two 

 united with the margin ; the legs Ire black, but the under fide of 



the^ 



