] 54 C. B. HARDENBERG. 



concealment, and thus several may be found together in such 

 places. No exact data are at hand relating to the length of 

 the pupa stage, but in our laboratory a male specimen, which 

 had fastened its bag to the top of the breeding-cage during 

 the fourth Aveek in November, emerged on January 9th, so 

 that the length of the pupa stage is at least six weeks. 



No inner bag is made, such as is found in A . j u n o d i ; but 

 the larva turns around in its bag, and the space between the 

 chrysalis and the Avail of the case is filled with loosely woven, 

 white, fluify silk, which is more voluminous in the case of the 

 female and extends down the neck of the bag. When 

 pupating, the lower part of the bag of the female is filled 

 with a comparatively loose mass of pure white, sticky silk, 

 this material also filling to a less extent the space between 

 the sides of the pupa and the wall of the bag. When the 

 female has emerged we find the lower portion yellowish buff 

 in colour, and the strands of silk of which it is composed 

 covered with small scales. The yellow colour is probably 

 derived from some fluid exuded by the emerging female, 

 which filters down through the white silk, Avliile the scales 

 are rubbed oif from her body. 



Male Pupa. — Length 12 mm., width 3|- mm. at meso- 

 thorax. General colour of thorax and wing-cases Hay's russet 

 (XIV), abdominal segments burnt sienna (II), vertex of head 

 antimony yellow (XV). Head, thorax, and appendages shiny ; 

 abdomen matte. Head slightly projecting ventrally, vertex 

 broadly rounded. Antenna-cases broadened at base, gi-adu- 

 ally tapering toward the tip, reaching nearly to the end of 

 the mesothoracic legs. Antennae transversely striate to the 



Text-fig. 5. — Acanthopsyclie tristis /ause. Pupa. 

 A. Side view of male pupa, x 5. b. Dorsal view of anterior part 

 of male pupa. X 8. c. Dorsal view of posterior part, x 8. 

 D. Ventral view of anterior part. X 8. E. Ventral view of 

 posterior part. X 8. F. Lateral view of female pupa. x 3. 

 G. Side view of anterior end of female pupa, x 11. H. Dorsal 

 view of anterior part. X 10. J. Ventral view of anterior part. 

 X 10. K. Dorsal view of posterior part. X 10. L. Ventral view 

 of posterior part. X 10. 



