these with forceps; putting- them in paper pill-boxes, and they ran about 

 so fast that I had much trouble to secure all. The same day I sent 

 these larvae to Dr. Jewett, at Dayton, Ohio, to go in an ice-box, and 

 there they are now wintering. 



It will be seen, therefore, that while Phaeton and Chalcedon are both 

 web builders, there is a difference. The climate of California does not 

 require a web as a protection against rain while the larvae are in their 

 first stages; whereas in the Atlantic States rain is the very thing to be 

 provided against. One web is slight, therefore, the other close, and 

 the Phaeton larvae have learned to be industrious at the proper season, 

 either when foreseeing damage, or in repairing damage. The lowland 

 Chalcedon go to ground for hibernation, not taking the trouble to build 

 webs, but the highland members of the species seem to have found a 

 web most suitable for their requirements, and build one as large and 

 strong as that of Phaeton. 



Since the foregoing pages were written, Mr. Wright has given me a 

 list of all food-plants of larvae of Chalcedo?i known to him as follows: 



" I. Penstenion antirrhinoides. 



2. " cordifolius. 



3. " ternatum. It was on this plant that I found a 

 large colony of half-grown lar\ce in a web at altitude of 5000 feet or 

 more," (as before related). " This is the only large colony I have ever 

 seen. 



4. Scrophularia Californica. 



5. Rosa miyiidi folia, Engel., a new species, a rose recently lound 

 in lower California, where on Jan. 25th, 1883, I found the larvae feed- 

 ing. At same time there were others alongside feeding on P. antirrhin- 

 oides. As this rose is a plant of quite different order from any other 

 in the list, I affirm the fact of such feeding as coming under my own 

 observation. 



Dipsacus, Castilleja and Lonicera, are all found here and known, but 

 I have never seen any larvae on either of them. Nine-tenths of all 

 the larvae in this country live on P. antirrhinoides. The female lays 

 her eggs upon the upper twigs in masses of 50 to 100, or more. The 

 young larvae separate into small colonies and build small webs on the 

 outer ends of the lower branches. I am pretty sure that they change 

 their place of abode and build a new web at every moul,t, but cannot 

 positively affirm that such is the case. At any rate, I frequently see 

 deserted nests with cast-off skins at an early date in the life of the 

 larvae. At third moult the larvae disappear, doubtless dropping to the 

 ground, to hibernate at the ba.se of the bush, under leaves and loose 

 soil. In April, tliey are again seen, solitary, feeding on the fresh 

 leaves of their plant. The chrysalis is found suspended to dry sticks 

 and to stems of other plants, near by." 



