204 



THE CANADIAN ENTOMOLOGIST. 



Food plant, Aster corymbosus, on the stems of which it makes an 

 elliptical, hollow gall, 1.25 inches in length, .48 of an inch in diameter, 

 the diameter of the plug (fig. 2) being .08 of an inch. 



The galls are found a few inches above the ground, the terminal bud 



developing very little after the 

 larva begins operations. May 

 22nd I found full-sized galls, the 

 inhabiting larva at the time being 

 quite small. July 1st I dis- 

 covered the first pupa which dis- 

 closed a moth, August 1st. The 

 larva just previous to its change 

 makes a perfectly round hole 

 (leaving a thin scale of the epi- 

 dermis) through the thin walls 

 near the top of its house, which 

 it fills with a closely-fitting plug 

 of silk ; on the outer border of 

 this plug is a flange which pre- 

 vents its displacement inwards, 

 but allows the escaping moth to 

 readily push it outwards. It 

 then lines the interior with silk 

 Fig2.TJat.Size. and soon changes to a chrysalis. 



Tweive galls collected August 3rd contained four without parasites, 

 while eight had an elliptical, dark cocoon suspended in the centre. 



NOTES ON PAPILIO CRESPHONTES AND CATOCAL^. 



BY G. H. FRENCH, CARBONDALE, ILL. 



This season I have seen some peculiarities in rearing Papilio cresphontcs 

 that seem worth noting. I had at one time four of the larvae in a cage 

 of three different broods. The two older ones changed to chrysalids 

 June 29th ; one from the top of the box with the head down, number two 



