PAONIAS MYOPS 193 



The antennae of the male are strongly pectinate, of 

 the female simple, so it is very easy to tell the egg- 

 layer at a glance. 



One pecnliarity of the caterpillars did not come into 

 our experience until after the foregoing account of 

 them was type-written and ready for the printers. 

 Then we had a large brood oimyops from the egg^ and 

 we found that when ready to molt the crawlers did 

 not fasten their anal props in any specially firm way, 

 spun no mat of silk to fasten them in, as many cater- 

 pillars do, and molted just as well as if the old skin 

 had been held fast for them to crawl out. More than 

 this — the caterpillars would leave the first place they 

 had chosen for molting, and crawl even to other leaves 

 or stems when molting was so far advanced that their 

 masks were almost dropping off. This we had never 

 before seen done by any caterpillar. 



We watched the pi pat ion of these my ops and found 

 that they crawled aljout the tin for hours, then became 

 quiet, with the body rather shortened. After this each 

 one curved to one side ; then, after one or two days, it 

 turned on its back, still curved and with the head bent 

 forward over the thorax, and the feet drawn up under 

 the mouth-parts. Thus it lay for hours, sometimes for 

 a day, and imperceptibly the skin was pushed down, 

 or the creature pushed itself up in it, so that the anal 

 end was wrinkled and the abdominal segments looked 

 distended. The lining of the spiracles api)eared as the 

 skin was pushed down ; the skin burst on the third 

 segment, and the pupa worked out, its antennae, legs, 

 etc., falling into }>laee on the thorax as the head and 

 thorax were drawn back and out. When the pupa 



