78 entomological news. [Mar., '07 



purplish color gradually extends anteriorly until the whole 

 body shows it. This change immediately precedes and accom- 

 panies the wandering of the larva while seeking a place to 

 pupate. The color becomes very dark, and by the time the 

 larva has spun its girdle, every trace of green has disappeared 

 from the body. The dorsal and lateral green stripes, the 

 ventral surface and the head are all very dark bluish-purple. 

 On close observation the traces of the subdorsal yellow lines 

 can still be seen. The infralateral line of white remains very 

 brilliant, and is accompanied by a trace of the yellow ; but it no 

 longer extends the whole length of the larva. It is interrupted 

 in the second and third thoracic segments, which become 

 swollen and turn purple as the wing rudiments develop beneath 

 the old cuticle. 



As pupation approaches, the color lightens somewhat, and 

 when the pupa emerges it is a beautiful rosy purple, with 

 a white infralateral line extending from the tip of the wing 

 to the tip of the abdomen. A short time before pupation 

 takes place, very slight peristaltic contractions begin in the 

 abdominal region, passing anteriorly. These contractions 

 probably serve two purposes: to loosen the old cuticle, and 

 to distend the anterior portions of the body where the rupture 

 of the larval skin is to take place. The weak contractions 

 give way to very strong peristalsis just as pupation commences. 

 The old cuticle ruptures over the thorax and down the me- 

 dian line of the head, and is soon cast. As a last act the anal 

 segment is withdrawn from the old skin, and the cremaster 

 is thrust into the button. 



The beautiful color of the pupa does not last long; within 

 a few hours the rose-purple fades, being reduced to various 

 shades of brown. 



Since no account of the pupa has ever been given, a more 

 detailed description might be appreciated. In profile the dorsal 

 line is almost straight, being but slightly concave just over 

 the wings. The average length is 18 mm. ; the greatest width, 

 3 to 3.5 mm. at a point 6 mm. from the anterior end; the 

 greatest depth is 3.5 to 4 mm. about 9 mm. from either end. 

 Figures 5 and 6 show the general shape of the pupa. 



