1913] Barnes and McDunnough — Western Calocala 201 



segment almost hidden in the ground-color; tubercles small, black; prolegs pale. 

 Beneath pale with the usual central blotches. Length, 11 mm. 



Stage III. Head pale, lobes tipped with orange apically, marbled with brown 

 in front and bordered by a deep brown lateral line. Body pale greenish-brown, 

 paler dorsally; dorsal stripe with central dark line; three lateral pale waved stripes 

 bordered with dark brown; tubercles more or less orange; transverse wart of 5th 

 abdominal segment mostly velvety-black, tipped with orange, with strong lateral 

 and posterior black shading extending down over prolegs of 5th and 6th segments; 

 tubercles II of 8th abdominal segment conical with black lunate mark posterior 

 to them. Length, 18 mm. 



Stage IV. Head with the apical orange shading more extended, front of lobes 

 marbled with pale brown with strong lateral black encircling band. Body pale 

 purplish-gray; a rather vague pale dorsal stripe with diamond-shaped enlarge- 

 ments and central dark line; the three lateral stripes indistinct with the border 

 lines broken up into a series of dots; tubercles orange, tubercle II being more 

 prominent than in faustina; a prominent transverse wart on 5th abdominal seg- 

 ment, orange, blackish at base, with black-brown shading extending obliquely 

 laterally as far as the prolegs, much more distinct than in faustina, 8th abdominal 

 segment with conical tubercles dorsally and lunate black-brown mark as before. 

 Length, 26 mm. 



Stage V. Head purplish in front, marbled with paler, with diffuse orange shading 

 apically and broad black encircling line laterally extending downward to mouth 

 parts; clypeus outlined basally with black with blackish central mark. Body 

 purplish-brown heavily mottled with black-brown dots; paler dorsal stripe with 

 diamond patches as before; three lateral pale stripes more or less traceable; tuber- 

 cles reddish orange, paler laterally; tubercle II prominent, marked posteriorly 

 with black especially on 5th and 7th abdominal segments; prominent wart on 

 5th abdominal segment, reddish orange, marbled with brown; brown lateral 

 oblique patch as before, crossed by a purple-brown spiracular stripe, above which 

 is some diffuse purplish shading and below which a purplish line extending down 

 over the 3rd and 4th pairs of prolegs; lunate black dorsal mark on 8th abdominal 

 segment usually distinct, extending laterally to spiracles, these latter ochrcous, 

 black rimmed; legs and prolegs purplish with ochreous shading, filaments whitish. 

 Beneath whitish tinged with pink with the usual central blotches. Length, 60 

 mm. 



Food-plant: Willow. 



The larvae are very closely allied to those of faustina but may 

 be distinguished in early stages by the darker coloration and in 

 the final stage by the much greater prominence of the lateral 

 dark patch on 5th abdominal segment We were not very suc- 

 cessful with the brood, only bringing a few to the imaginal state; 

 these all showed the prominent waved white subterminal line 

 and some white patches in the cell. 



