CLASSIFICATION" OF THE A.SOAL APHID M, 



265 



Species. 



The two species are sufficiently recognizable from Westwood's 

 description and figures. 



1. O. tessell ata, Westwood. (Ascal. (Ogcog.) tessellatus, West. 

 Cab. Oriental Ent. pi. xxxiv. 1 .) 



Hab. India. 



2. O. segmentator, Westwood. (Ascal. (Ogcog.) segmentator, West, 

 op. cit. pi. xxxiv. fig. 2.) 



Hab. India. 



Grenus Acheron, Lefebvre. 

 (Hybris, part.. Hag.) 



Wings elongate, dilated in the middle, especially in the 2 > * ne 

 extreme base of the inner margin of the anterior pair with an 

 oblique excision, followed by a slight dilatation, but not appen- 

 diculate : network rather dense ; branch of the lower cubitus 

 confluent with the postcosta in all the wings. Pterostigma 

 large, the apical side extended and very oblique. 



Antennae shorter than the anterior wings, with a slight bend in 

 the basal portion in the cf , and the apex bent downwards ; 

 denticulate internally at the base ; club broadly pyriform. 



Eyes with the upper division rather larger than the lower. 



Thorax scarcely villose. 



Abdomen very long in the 6 , much longer than the wings ; 



shorter in the $ , slender and laterally compressed in both 



sexes ; appendices absent. 

 Legs with the spurs of the posterior tibiae scarcely longer than 



the first tarsal joint. 

 Hab. North India and China. 



The <$ is readily distinguished by the great length of the ab- 

 domen, absence of appendices, and the denticulate base of the 

 antennae; the $ is much allied to that of Hybris, and is not 

 readily separable therefrom ; the broader wings, and longly ex- 

 tended pterostigma of the anterior pair, and the somewhat di- 

 lated base of the costal area in the posterior pair, are the most 

 evident characters. 



Species. 



1. A. longus, Walker. (Ascal. longus, Walk. Cat. Brit. Mus. Neurop. 



p. 435, <J. — A. trux, Walk. op. cit. p. 432, <3 . — A. loquax, Walk. 



op. cit. p. 434, $>.— A. anticus, Walk. I.e. $>.) 

 Walker's several species appear to me to be all forms or sexes 



