204 IOWA ACADEMY OP SCIENCES. 



Observations on these berries would favor the conclusion 

 that the larvae develop within a single berry, no injured berries 

 being found which did not contain pupae, However, two ber- 

 ries were found with an opening on the side and containing 

 well developed larvae with very little of the inside of the berry 

 devoured, suggesting that the larvas, under exceptional condi- 

 tions migrate from a berry of insufficient food material to a 

 fresh one. 



But very few larvas were found and these during the last 

 week in September. They were at that time mature and 

 apparently ready to pupate; so of the early molts and even of 

 the full grown larvae we cannot-give a satisfactory description. 

 Those observed were rather contracted, spindle-shaped, whitish, 

 with a reddish- brown head, sparsely haired. 



Papation occurs during last two weeks of August and is in 

 nearly all cases completed by the last of the month. 



The pupae are dark brown, six mm. long, and no distinctive 

 characters that v/ould separate them from related species were 

 detected. The cocoon is thin but of tough, close woven silk. 

 In forming the cocoon the larva attaches itself to the blossom 

 end of the berry by means of the caudal prologs and then 

 builds the cocoon which practicajly tills the cavity of the 

 shriveled berry. 



1. {Oelechia sp.) a, injured berries, b, moth, c, mature 

 larva, d, pupa, e, parasite Ccntcterua suturalis. 



Moths first appeared October 3d, so the period of pupation 

 may be stated as from two to three weeks. 



The moth shown at b in Fig. 1 is of a gray color with darker 

 spots on the wings. It closely resembles G. quercifoliella. 



