RE-INSTATEMENT OF CHLOROPERLA VENOSA. 



75 



C. grammatica. 



Distance between the hind pair 

 of ocelli considerably less than 

 double the distance between 

 these ocelli and the eyes. 



Head ochreous yellow ; mark- 

 ing between ocelli horseshoe- 

 shaped ; as a rule, clearly defined 

 in the dry insect. 



Pronotum ochreous yellow, only 

 the warty portions of the side 

 fields brownish. 



Mesonotum chestnut-brown ; the 

 praescutum, the two lobes of 

 the scutum and the anterior 

 narrow part of the scutellum 

 lying between the lobes of the 

 scutum yellowish ; the three 

 latter parts, being outlined in 

 brown, form a somewhat 

 broadly cordate marking (from 

 examples in formalin). 



Neuration yellowish green, not 

 very prominent ; in fore wings, 

 costa, outer part of radius, of 

 sector radii, and of median, 

 also outer cross-veins and a 

 part of the anterior cubitus, 

 brownish. 



Setae, as a rule, not distinctly 

 annulated. 



Appendage of eighth ventral seg- 

 ment of male broader than 



long. 



Subgenital 

 rounded. 



plate of female 



G. venosa. 



Distance between the hind pair 

 of ocelli double or rather more 

 than double the distance be- 

 tween these ocelli and the eyes. 



Head with the dark markings 

 more extended and more 

 suffused, the yellow between 

 the ocelli often reduced to a 

 mere spot. 



Only middle field and outer mar- 

 gins of pronotum yellowish, 

 the remainder usually dark in 

 dried specimens. 



Middle of prasscuturn yellow, the 

 pale colour being continued 

 usually as a rather narrow line 

 on the anterior part of the 

 scutellum, the lobes of the 

 scutum remaining nearly alto- 

 gether brown (from examples 

 in formalin taken in Norway). 



Wings more hyaline ; neuration 

 of fore wings rather strong and 

 nearly all brown, excepting the 

 veins at the base, the radius 

 which is pale to the sector, and 

 the subcosta which is yellow 

 throughout. 



Setae rather distinctly annulated. 



Appendage longer than broad ; 

 chitinized portion coloured in 

 a way that gives the appendage 

 the appearance of being con- 

 tracted about the middle. 



Subgenital plate of female tri- 

 angular. 



C. grammatica is a widely spread species and usually common 

 at clear rivers and streams. 



Of C. venosa I have seen only the specimens sent by Prof. 

 Carr, which bear the following data : — 



Stoke Bardolph, May 11th, 1911, F. M. R. One male, one 

 female. 



River Trent, Nottingham, May 10th, 1912, H. Mottram. 

 One female. 



Nottingham, May 14th, 1912, H. Mottram. One male. 



g 2 



