Explanation of Plates. 307 



Plate XLV. ^I. thersiles. Honey-gland region X 100. 

 Fui. 1, from a skin cast at pupation. 

 2, from a prepared skin. 



Plate XLVI. Honey-gland region, last instar X 35. 

 Fig. I, a. ther sites. 

 2, P. icarus. 

 Many more sniall hairs and lenticles are present in thersites than 

 in icarus, but various large hairs present in icarus are wanting in 

 A. thersites. 



Plate XLVII. Dorsal hairs of 3rd abdominal segment X 100. 



Fig. 1. A. thersites, whole width of segment. 

 2. P. icarus, posterior half (only) of 

 segment. 

 The comparison is difficult by the skin of A. thersites having been 

 less extended than that of P. icarus. 



Plate XL VIII. Pupa of A. thersites. 



Fig. 1 shows the dorsal headpieces consisting 

 of two fusiform portions attached 

 to front of head X 44. In other 

 specimens these pieces are attached 

 to prothoracic piece, as is in other 

 species the rule. 

 2. Portion of sixth abdominal segment 

 showing rosettes, which are not 

 abundant on this pupa X 200. 



Plate XLIX. Pupa of A. thersites. 



Region of (Fig. 1) fifth and (Fig. 2) sixth 

 abdominal spiracles x 100. 



Plate L. Pupa of A. thersites. 



Fig. 1. Cremastral area of pupa (cj) X 44. 

 Shows sundry hairs but no trace 

 of hooks. 

 2. Scar of honey-gland x 100. 



Plate LI. Photograph by Mr. Hugh Main. 



Upper- and undersides of four bred 

 specimens of A. thersites and of two, 

 c? $, of P. icarus from the same 

 locality as the thersites. 



No. 1 (J thersites is a variation on the underside by diminution of 

 spots (p. .303). 



