28 SOUTH-AFRICAN BUTTERFLIES. 



Localities of Tcrias rcgidaris. 



1. South Africa. 



B. Cape Colony. 



a. Western Districts. — Forest Hall, near Plettenberg Bay {Miss 



Newdigafe). 

 h. EasternDistricts.— King William's Town ( IF. S. M. U Urhan). 

 E. Natal. 



a. Coast Districts. — D'Urban. Verulam. Mapumulo. 

 h. Upper Districts. — Fort Buckingham, Grey town, and Umvoti 

 District. Pietermaritzhurg. 



II. Other African Regions. 

 B. North Tropical. 



a. Western Coast (/. M. Fash). 



hi. Eastern Interior. — " Atbara" River [Soudan]. — A. G. Butler. 



Genus MYLOTHRIS. 



Mijlotliris (Hiibu., 1816, part.), Butler, Cist. Ent., i. p. 42 (1870). 

 Pieris, Godart [part.], Enc. Meth., ix. p. 10 (181 9); et Auct. 

 Pieris, Trim, [part], Rliop. Afr. Aust, i. p. 26 (1862). 



Imago. — Head small, clothed above and in front with rather long 

 and sparse bristly hair; jx(//n slender, elongate, scaly above, — basal 

 and middle joints with long and bristly hairs beneath, — terminal joint 

 rather longer than middle one, porrect and ascendant, slightly thickened 

 just before tip ; antcnnm of moderate length and thickness, with a 

 short, abruptly-formed, flattened club, rounded at the tip. 



Thorax short and rather slender, clothed densely with hair, which 

 above is long and silky. Wings thin (in some species very delicate) 

 and large. Fore-ivings rather elongate, with the costa very slightly 

 arched ; apex not acute but pronounced ; hind-margin almost straight 

 or slightly convex ; costal nervure ending at about three-fifths of wing 

 from base ; subcostal nervure three-branched, — first and second nervules 

 given off not far apart, near extremity of discoidal cell — the first very 

 short (sometimes in M. Agafhina joining costal nervure, and in one $ 

 specimen almost obsolete), — second long, ending not far before apex ; 

 upper radial united to subcostal nervure at origin of third nervule, 

 lower radial from junction of two disco-cellular nervules ; of the latter 

 the lower is twice as long as the upper, but much less oblique and 

 slightly angulated or merely curved ; discoidal cell large, nearly three- 

 fifths length of wing, broad and truncate at extremity. Hind-iviiigs 

 bluntly obovate ; hind-margin convex, very slightly sinuate ; inner 

 margins convex, meeting below abdomen ; costal nervure very short, 

 terminating considerably before middle ; first subcostal nervule emitted 

 considerably before extremity of cell, much arched, ending at some dis- 

 tance before apex, — second nearly straight, ending at apex ; disco- 

 cellular nervules both oblique, the lower nearly or about twice as long 



