176 Annals Entomological Society of America [Vol. IX, 



The head is smaller than the prothorax. It bears on the 

 vertex two slender, porrect, very slightly dehiscent setae, reddish' 

 brown in color, and approximately 0.21 mm. in length. In the 

 older pupae, the eyes are dark in color and show through the 

 integument. The antennal cases lie parallel to the second leg 

 cases, extending with the latter around on the ventral surface of 

 the body and approaching the mid-ventral line. In the spec- 

 imens examined, the length of these antennal cases varied, 

 depending, apparently, upon the age of the pupa. The extent 

 of the variation is from a position opposite the first pair of 

 abdominal spiracles to the posterior tips of the wing cases. 

 They acquire an external segmentation corresponding to the 

 segmentation of the antennas within and have a distinctly 

 moniliform appearance. From the ventral surface of the head, 

 a long, tapering, double sheath extends caudad along the mid- 

 ventral line of the body to a point approximately opposite the 

 tips of the wing cases. It contains in its cephalic end the 

 developing palpi and proboscis. 



The thoracic segments and their associated parts are similar 

 in color and appearance in the newly transformed pupae. On 

 the ventral surface, the cases for the wings and legs cover the 

 greater part of the first four abdominal segments. The tips of 

 the wing cases extend almost to the caudal margin of the 

 fourth abdominal segment. The ventral sheath, for the hind 

 legs, is prolonged caudad almost to the tip of the abdomen. As 

 stated by Forbes ('10, p. 222), the length of this ventral sheath 

 varies considerably. In the large number of pupae examined by 

 the writer, the caudal extremity varies in position from the 

 caudal margin of the sixth abdominal segment to the posterior 

 end of the body, a variation represented in extent by the com- 

 bined width of the three posterior segments of the abdomen. 

 The sheath for the second pair of legs also varies in length. It 

 often extends but little if any beyond the tips of the wing cases, 

 but specimens have been studied in which it extended to the 

 caudal margin of the fifth abdominal segment. The case for the 

 first pair of legs is shorter than the others, the posterior extrem- 

 ity usually reaching a point opposite the spiracles on the third 

 abdominal segment, although this case is likewise subject to 

 some variation in length. Observations on pupae of different 

 ages lead the writer to believe that the length of the leg cases is 



