(95 ) 



sclerite can be best studied when viewed from below {i.e. when tlie insect is lying 

 on its back), and the drawing represents its appearance from this position (text- 

 figs. and ^). The apical edge of the eighth sternite is turned inwards, the reflexed 

 portion being undulate and incrassate. The effect of this modification is to provide 

 a groove between the two sclerites of the eighth segment in which the penis is 

 situated when at rest, the groove in question being transversely ribbed and wrinkled. 

 In Cacodiiiiis n'!lo.sitx Stal. this groove is continued to segment 5, owing to the 

 great length of the penis. The eighth sternite bears numerous bristles of type 1. 

 On the inner surface (i.e. the turned-in edge), as well as on the outer surface, 

 there are a large number of thin bristles of this type ; they are more numerous 

 on the right (when viewed from below) than on the left side, and are sparsest at 

 the ])oint where the outline of the penis is visible through the sclerite. 



The outline of both the sclerites of the eighth segment varies somewhat both 

 in CI. columbarius (text-figs. 5 and 6) and Cl.foedits Stal. (text-figs. 7 and 8). 

 It will be noticed, however, from the figures, that the left side of the eighth 



Clinororis cohimharitis ^ , 



tergite is more angnlate in coliimhariuH than mfoediis, and that the penis oi foerhi.^ 

 is very distinctly recurved at the apex, which is not the case in cobimhariiig. 



The apex of the seventh sternite iu tiie male is more concave than that of 

 the preceding sternites, to allow a freer movement of the sexually modified eighth 

 sternite, which it but sliglitly overlaps. 



In the female, as already mentioned, sexual modification has extended to the 

 seventh as well as to the eighth sternite, though the seventh and eighth tergites 

 are apparently normal. The structure of the seventh sternite is very remarkable, 

 and ajiparently similar in all the Cimicidae (= Clinocoridae). When viewed from 

 below, in a normal condition, it is shaped like the roof of a house. It consists of 

 six pieces (text-fig. '.)). 



The two lateral sclerites bear the stigmata ; they are triangular in shape {i.e. 

 narrowed ajiically). These two sclerites are well chitinised except at tiieir edges, 

 which are transparent, and are united with the tergite. The bristles on these 

 portions are of types 2, 3, and 4. 



