1 88 SOUTH- AFEIC AN BUTTERFLIES. 



Genus ATELLA. 

 Atella, E. Doiibl., Gen. Diiirn. Lep., i. p. 165 (1848). 



Imago. — Head very broad, wider than thorax, tufted with hair 

 superiorly ; eyes smooth, very prominent ; pal^oi wide apart, projecting 

 considerably in front of head, — the second joint long and swollen, 

 thicker anteriorly, grooved centrally and longitudinally beneath, closely 

 hairy above but scantily so beneath, — terminal joint very small and 

 slender, acutely pointed, clothed with scales ; antenncc of moderate 

 length, with rather a gradually-formed, jflattened, not broad, spoon- 

 shaped club. 



Thorax moderately robust, rather short, hairy (especially on breast). 

 Fore-wings prominent apically ; costa well arched ; hind-margin rather 

 hollowed in middle ; inner margin slightly hollowed beyond middle ; 

 costal nervure short, ending about middle ; first subcostal nervule 

 given off at or just before extremity of discoidal cell, second at a little 

 or considerable distance beyond it ; discoidal cell short, closed by 

 attenuated lower disco-cellular nervule joining median nervure about 

 origin of its second nervule ; upper disco-cellular nervule extremely 

 short, straight, — middle one of moderate length, much curved inwardly. 

 Hind-ioings very slightly or more distinctly prominent in the lower 

 anal-angular portion ; costa slightly arched ; hind-margin moderately 

 dentated. — the dentation at end of third median nervule more pro- 

 nounced than the others, and sometimes prolonged into a short tail ; 

 inner-margins almost touching as far as end of internal nervure — 

 forming a very wide, shallow, imperfect groove — but thence divergent ; 

 costal nervure extending to apex ; first subcostal nervule arising not 

 far from base, and very oblique upper disco- cellular nervule only a 

 little distance farther ; lower disco-cellular short, very thin, almost 

 atrophied, slightly curved ; discoidal cell short, narrow ; internal nei*- 

 vure extending to considerably beyond middle. Fore-legs of ^ very 

 slender ; tibia and femur of about equal length, the former and tarsus 

 densely fringed with hair : of $ longer and thicker, not or very slightly 

 hairy ; tarsus indistinctly articulated, and slightly spined beneath. 

 Middle and hind legs moderately stout, scaly ; femora smooth ; tibiee 

 and tarsi very spinose beneath, less so above ; tibial spurs long, very 

 slender. 



Abdomen short, slender, slightly arched. 



Larva. — Armed with rather long spines set with bristly hairs ; 

 head without spines or horns. 



Pupa. — Moderately stout, not much curved abdominally, and rather 

 rounded anteriorly ; dorsal region with six or seven pairs of pointed 

 tubercles or short thin spines. 



The differences which distinguish this genus from Argyn7iis — the 



