18 



the tree than Pupa cases were counted, it is behevecl tliat tliey came 

 from neighhoring trees having been attracted by sexual instincts. 



While tlie pupa cases of Aegeria exitiosa and picti2^es are identical 

 in appearance, the female imagines are quite unlike. Exitiom is said 

 also to unliabit the Plnm as well as the Peach tree, and for a time 

 jn'riipes was su])posed to he exitiosa, aljthough tlie characteristic 

 female of tliis species had not lieen captured. 



When examples were brought to the notice of Prof. A. P. Grote, 

 he immediately recognized them as pirti^x's and as having been 

 described by Cirote & Eoljinson. 



Aeyeria p)i''-t>pfs Jilso has its ichneumon which has fre<|uently been 

 observed industriously exploring first one orifice and then another, 

 searching for a subject in which to deposit its eggs. 



On examining the trunk of the Plumtree, the home of Aegeria 

 pictipes, the surface of the bark was found in places perforated 

 with holes made l)y the pupa forcing itself througii to give exit to 

 the imago; in other places the bark was cracked and its edges 

 turned outward, disclosing underneath the alburnum sjilit and the 

 exposed surface of the wood covered with pieces of the bark gnawed 

 fine by the cateri>illars in tunneling their path beneath the cortex 

 and next to the alburnum. 



In places pupa cells were found constructed with the fine sawdust 

 cemented with gum and slightly excavated into the surface of the 

 sapwood : on laying them open the pupa lay concealed with the head 

 pointing to and in contact with the perforations in the bark. At other 

 situations there was a fluid gummy exudation underneath the Ijark 

 in which were found cater})illars in various stages of growth from 

 that of a fine entomological pin to tlie full grown caterpillar; near 

 the cracked and furrowed places were found pupa cells containing 

 dead pupae and in close proximity were found dessecated caterpillars 

 which had perished from exposure to rain and sunshine. In no place 

 was the alburnum perforated by Hie caterpilhir, but C([ual parts of 

 the sapwood and jjark was scarafied to form a channel for the pas- 

 sage of the worm. This condition was tlu'ougliout a distance of eight 

 feet the length of the tree trunk, tiie body was inclined towards 

 the east, tlie bowing portion facing the west, tliis portion contained 

 the fissured bark and wood, also the dead caterjiillars and i)upae. As 

 with other families of borers when the imago is ready for exit, the 

 pupa pushes itself half its length through tlie Iwrlc, where it is exposed 

 to the drying influence of the atmosphere and sunshine, the case 



