ZOOL.-VOL. II.] COLEMAN—DACTYLOPIUS SEQUOIA. 413 



at its base which extend shghtly beyond the end of the 

 claw. All the segments of the legs are more or less cov- 

 ered with hairs which are arranged in rather definite 

 rows. 



The mouth-parts are not as large in proportion to the size 

 of the body as in the female of about the same ao-e, and 

 markedly less so than in the adult female. The buccal 

 set£e are especially short. 



4. Formation of the Pupal Case (fig. 3). — About 

 February 20, the male larvae begin to secrete the waxy 

 fibers for the cocoon. With this secretion there is a 

 slight change in the form of the body. The ridge on the 



'back is now quite pronounced, and there is a folding in of 

 the integument near the dorso-lateral margin of each seg- 

 ment, so as to form a second ridge (fig. 3). The secreted 

 fibers first appear at the lateral margins, and there form 

 white plates extending out from the body at right angles. 

 Gradually the whole body becomes enveloped in a white 

 waxy cocoon of semicylindrical shape, slightly conical at 

 the lower end, and bearing two projecting tubes, in which 

 the long waxy caudal filaments are formed. There are also 

 two projections at the cephalic end enclosing the antennae. 



5. The Pupa (fig. 4). — On examining a somewhat 

 advanced pupa, we notice, first, a general change in form. 

 The head has become much reduced in size and contracted 

 in form, being now very distinctly separated from the pro- 

 thorax, which is also smaller, and quite distinctly marked 

 off from the mesothorax. The wing-pads are well devel- 

 oped. The lateral margins of the fifth, sixth, and seventh 

 abdominal segments are marked by large tubercles, each 

 bearing a single stout spine. The anal projection of the 

 ninth segment is prominent, and the penis and other repro- 

 ductive organs have begun to develop. The anal ring and 

 hairs have disappeared, as have also the mouth-parts. The 

 ocelli are not yet visible, although there are indications of 

 them. 



The antennae are noticeably longer and although still 

 enclosed in their pupal sheath show plainl}^ the ten joints 



