70 RHOPALOCERA AFRICA. AUSTRALIS. 



bright-yellow colour. I do not know what led Mr. Doubleday to consider 

 this species as identical with the Fabriciau Papilio Castalia, of which lat- 

 ter I translate the description in "Entomologia Systematica." 



" Wings entire, rounded, white, unspotted above ; beneath, 

 yellowish at base." — Ent. Syst., Ill, 1, p. 188, n. 580. 



" Rare ; November and April." — D'Urban. 



Knysna. — Coll. mihi ( ? ). 



Butterwortli, KafFraria (J. H. Bowker, 1861).— Coll. S. A. 

 Mus. ( ? ). 



Graham's Town. King William's Town.— Coll. W. S. M. 

 D'Urban. 



" Bay of Port Natal."— Boisd. 



Senegal. Sierra Leone. Ashanti. Mauritius. — Coll. 

 Brit. Mus. ( ? s). 



Genus C O L I A S . 

 Colias, Fab. 

 Eurymus, Swains. 

 Pieris, Latreille. 



Imago. — Head of moderate size ; eyes naked, moderately 

 prominent ; palpi compressed, slender, slightly divergent at 

 tips, clothed beneath with fine hair (more hairy than in 

 Callidryas) ; antenna rather short, stout, with a gradually- 

 formed, truncate club, but more distinctly knobbed than in 

 Callidryas, Thorax densely clothed with silky hair. Fore- 

 wings somewhat elongate, truncate ; costa nearly straight 

 after the first upward curve from base ; apex rather pointed, 

 but not sharply so ; hind-margin very slightly convex ; anal 

 angle rather acute ; inner-margin almost straight. Hind- 

 wings subovate, rather truncate, more rounded than in 

 Callidryas ; hind-margin very slightly dentate. Abdomen of 

 moderate length, slender. 



Larva. — Similar to that of Callidryas ; usually green, 

 with pale lines along the sides. 



Pupa. — " Keeled, or ridged, above ; without lateral angles, 

 not curved, terminating anteriorly in a point." — Chenu, Enc. 

 d'Hist. Nat. — Papillons, p. 58. 



This Genus is not a large one, but consists of several very 

 closely allied species, in some instances very difficult to dis- 

 tinguish. I have only found a single species in the Colony, 

 and until recently was not aware that any other species in- 

 habited the South of Africa. Mr. Layard, however, informs 

 me that specimens of Colias Hyale, Linn., in the South 

 African Museum, were most certainly taken in South Africa ; 

 and further, that he himself took this species close to Cape 

 Town in 1855, soon after his arrival in the Colony. That 



