LACHNOPTERA. 161 



Genus VIII. LACHNOPTERA. 



Argynnis God 1 . §c. 

 Issoeia Hiibn. 



Head of moderate width, hairy. 



Eyes oval, not very prominent. 



Maxillce slightly longer than the thorax. 



Labial Palpi slightly divergent, ascending, rising considerably above the forehead, scaly; the 

 second joint furnished with a dorsal tuft, and externally with numerous erect setae. Basal joint 

 curved, short, rather less than one fourth the length of the second ; second joint gradually 

 enlarging for about two thirds of its length, then tapering almost to a point at the apex, which 

 is truncate ; third joint slender, acicular, about one eighth the length of the second. 



Antennm of moderate length, rather abruptly clavate ; the club obtuse, its articulations not more 

 distinct than those of the other portion. 

 Thorax oval, moderately stout, hairy. 



Anterior Wings nearly triangular; the anterior margin slightly rounded ; outer margin sinuate, 

 emarginate, about two thirds the length of the anterior ; inner margin, in the males at least, 

 rounded, equal in length to the outer. Costal nervure terminating beyond the middle of the 

 costa. Subcostal nervure emitting its first nervule a very short space before the end of the cell ; 

 its second a short distance beyond the cell ; third subcostal much more remote from the second 

 than from the fourth, not extending to the apex ; fourth about equally distant from the third 

 and from the apex, shortly before which it terminates. Upper disco-cellular nervule almost 

 wanting ; middle disco-cellular curved inwards ; lower nearly three times as long as the middle 

 disco-cellular, very slightly curved, anastomosing with the median nervure before the origin of 

 its second nervule. Internal nervule wanting. 



Posterior Wings somewhat quadrangular ; the anterior margin nearly straight ; outer margin 

 sinuate, produced into an angle at the termination of the third median nervule, the distance 

 between this angle and the apex about equal to the length of the anterior margin ; inner longer 

 than the anterior mai'gin, emarginate before the anal angle ; the abdominal fold ample. 

 Trecostal nervure simple, curved outwards. Cell open. Discoidal nervure appearing to be a 

 third subcostal nervule, bent soon after its origin. Third median nervule much curved. 



Anterior Legs of the male clothed with long delicate hairs. Tibia shorter than the femur. Tarsus 



May, 1848. X X 



