Description of Cheiropachus Quadrum. 25 



organs of oviposition are visible, having the appearance of an eighth 

 joint (M. and N. e). All the dorsal segments turn downwards at an angle 

 (M. and N. d.) and become partially (or, as it may perhaps better be 

 termed, sub-) ventral, since there are five distinct, true, ventral segments, 

 the four basal ones being short, and reaching to about half the length of 

 the second dorsal segment (Fig. M. and N. hhbb.) and the fifth long, 

 reaching to the end of the fourth dorsal segment (Id. c), and it is beneath 

 the tip of this fifth ventral segment that the ovipositor appears to take its 

 rise, at a considerable angle, which passes within or beneath the deflexed 

 margins of the fifth, sixth and seventh dorsal segments. Fig. 0. repre- 

 sents a section of the abdomen at the fourth dorsal segment, shewing its 

 triangular form, the manner of the connexion between the dorsal and 

 ventral segments, and the position of the ovipositor. 



Species I. Ch. quadrum. (Dipl. quadrum, Fab.) 



Tab. II. Fig. 2, $ . 



C/eom/mw5 ?nacM%ewn25, Curtis, Brit. Ent. No. 194, $, 



$ . For the description of this sex see Curtis, I09. cit. The colour of 

 the thorax varies from bright green to a dark, obscure, blackish green, 



$ . Head and thorax deeply punctured, dull cupreous, slightly tinged 

 with green ; antennae dark brown, first and second joints ochraceous. 

 Abdomen perfectly smooth and shining, dark cyaneous black, tinged 

 with dark green ; its basal segment elevated at the sides and brighter 

 green, the apex slightly pubescent. Wings iridescent, the superior 

 with two dark brown spots on each, one (the smallest) near the centre, 

 the other near the tip, passing through the furcate nerve. The spots 

 in the wings of the females are not quite so large as in those of the 

 males, they also vary a little in size in individuals of the same sex. 

 Legs ochreous, the four posterior thighs shaded pitchy. The size of 

 both sexes of this species varies considerably ; I have specimens of 

 each scarcely more than ^ of that of others of the same sex ; I have 

 also a male even larger than the largest females. 



Specimens of both sexes are in the cabinets of Mr. Stephens and my- 

 self, and specimens, of the males in those of Messrs. Cooper, Curtis, 

 and Ingpen. My specimens were taken by myself, several years ago. 



