Explanation of Plates. 557 



life and the. first part of pupal were passed in a damp jar 

 (March 30 to April 5). The imago is nevertheless a 

 characteristic example of the dry phase. 

 Fig. 3. Precu antilope 9 , form simia, Salisbury, 5000 feet, captured 

 Feb. 23, 1902, ai'ter it had laid eleven eggs. Parent of 

 butterflies represented in Figs 3i and 'i1>. The under- 

 side is shown on Plate XIII, fig. 4. 

 3a. Precis antilope 9 , offspring No. 1 of liutterfly represented in 

 Fig. 3. Egg laid Feb. 23, hatched Marcli 1, larva pupated 

 April 10, imago emerged April 27. The under-side is 

 shown on Plate XIII, fig. Aa. 

 36. Precis antilope ,^ , offspring No. 2 of butterfly represented 

 in Fig. 3. Egg laid Feb. 23, hatched March 1, larva 

 pupated April 14, imago emerged April 29. The under- 

 side is shown on Plate XIII, fig. ib. 



4. Precis archesia $ , captured Oct. 7, 1 897, at Malvern, 800 feet, 



near Durban, Natal. This insect was in cnittt with the 

 form represented in Fig. 5. 



5. Precis archesia i^, a form varying somewhat distinctly in 



the direction of the wet phase (pelasgis), captured in coitu 

 with the insect represented in Fig. 4. The tendency 

 towards pelasgis is better shown uj)on the under-side, 

 Plate XIII, fig. 8. 



Explanation of Plate XIII. 



Seasonal Phases op Butterflies of the Genu.s Precis. 



Under-sides of seasonal phases of Precis sesam}is, P. antilope, and 

 P. archesia, including those of P. antilope and its two ofl'spring 

 shown on Plate XII. 



All the figures are about y\ of the natural size. 



All the specimens not otlierwise described were captured by Guy 

 A. K. Marshall. 



Fig. 1. Precis sesamvs, form natalensis $, under-side of wings; 

 Salisbury, 5000 feet, captured Feb. 20, 1898. Comparing 

 this with Figs. 1, 16, and 2 on Plate XII, it is seen that 

 the under-side, although very similar to the upper, is even 

 more conspicuous than it. The difference is brought 

 about by the pale spots on the black basal patch of the 



