1913] Barnes and McDunnough — Western Catocala 199 



colored dots, usually with subdorsal blackish band formed of numerous spots 

 defining the pale diamond shaped patches, most accentuated behind tubercle II; 

 a similar but less distinct spiracular band; tubercles yellow-ochre, small; wart on 

 5th abdominal segment not prominent, tinged with oehreous; vague traces of a 

 black dorsal lunate mark on 8th abdominal segment; tubercle II on this segment 

 not much larger than on preceding segment; legs and prolegs pale thiged with 

 pinkish; spiracles oehreous ringed with black, filaments pale. Beneath whitish 

 with the ordinary black blotches. Length, 45 mm. 



Food-plant: Poplar. 



The larva emerges somewhat later than pura; we brought a 

 number of larvse to maturity but they all failed to pupate and 

 gradually shrivelled and died. Streeker's aspasia was described 

 from Lower California and we are in doubt whether the name 

 will apply to the form found in Utah and Colorado which com- 

 monly goes under the name aspasia. The larvae in Stage III 

 show great similarity with the final stage of pura, but in their 

 maturity apparently approach closest to parta. 



Catocala faustina Stkr. 



Ovum. Echinus-shaped; deep purple-brown with blotches of pale greenish 

 apical ly and a narrow central band of similar color; micropylar area arising from 

 slight depression at apex of egg, irregularly circular, formed of minute cells sur- 

 rounded by ring of single larger cells; remainder of surface with longitudinal ribe 

 jf which 17-20 attain edge of micropylar area, branching immediately below it 

 either once or twice and forming 35-40 ribs near base of egg; these are crossed by 

 minute transverse ribbing. Diameter, 1 mm. 



Stage I. Head pale brown, mouth parts whitish. Body smooth, pale gray- 

 green shading into purplish laterally with 3 pale waved lateral lines; prothorax, 

 anal plates and plates on sides of prolegs gray-brown; tubercles minute black 

 with small setae. Beneath pale with the usual dark central blotches. Length, 

 5 mm. 



Stage II. Head red-brown, paler towards front, mottled. Body smooth pale 

 greenish brown, paler than in preceding stage, shading laterally into purplish, 

 this color especially marked above prolegs forming more or less evident blotches; 

 three pale lateral lines as before. Tubercles small, black, larger posteriorly. In 

 later stage of growth a pale irregular dorsal band with diamond patches is visible 

 and there are traces of a transverse reddish wart on 5th abdominal segment. 

 Length 10 mm. 



Stage III. Head pale in front, cheeks mottled with brownish with blackish 

 curved lateral line. Body light-brown, pale dorsal irregular band bordered by 

 dark lines and with the usual diamond-shaped enlargements; the three pale lines 

 of earlier stages have broadened into irregular pale reddish bands, defined and bor- 

 dered by dark lines; a transverse black wart across the rear of 5th abdominal 



