ZOOL.— Vol. II.] COLEMAN— DACTYLOPIUS SEQUOIM. 417 



the skin became exactly reversed, leaving the abdomen 

 attached until the very last thing. The male had entirely 

 freed himself from the skin by twelve o'clock, and soon 

 began to move the legs and antennae, at first very feebly, 

 gradually increasing the movements as he gained strength. 



The process of the unfolding of the wings is also very 

 interesting. In a few minutes after the male emerged, the 

 wing-pads began to swell up at the base, and proceeded to 

 expand in much the same way that a balloon does in being 

 inflated with gas. The swelling passed rapidly from base 

 to apex of wing, the wing expanding at the same time. 

 This process occupied about fifteen minutes, although the 

 full expansion of the wing was not complete until the follow- 

 ing morning. 



The long waxy caudal filaments were at first folded up 

 and it took some time for them to straighten out. 



Soon after emergence the male began to move about 

 quite actively, walking with wings extended at an angle of 

 about forty-five degrees above a horizontal plane. The 

 long white filaments were also extended at an angle of about 

 thirty degrees and directed slightly upward, giving him a 

 very graceful appearance. 



When approaching a female, the antennas were used to 

 discover her definite location, and there was a rapid vibration 

 of the wings when he first found her. I reared a number of 

 males in glass breeding jars, and in no case did I observe 

 even a short flight, or attempt to fly, although I shook the 

 jar and even touched the insects with a needle. 



From my observations, I should say that the males live 

 on an average for three days after maturity; the longest 

 record I have is four days, and the shortest, two days. 



4. The Female and Ovisac (fig. 7). — The females 

 began to secrete ovisac about April i. The first appearance 

 of it was a little white fringe of waxy filaments protruding 

 from the ventral margins of the three caudal segments of 

 the abdomen. As the process of secretion continued and 

 the ovisac grew in length and thickness, the abdomen of the 

 female was gradually raised up so that it finally stood nearly 

 at right angles to the natural position. In about two days 



(2) May 22, 1901. 



