Sept.-Ucc, 19:11 1 Weiss-Dickersox : Milkweed Insects. 131 



After hatcliintr tlicy l)urro\v just under tlie bark and later usually 

 down but sometimes up the stem in the tissue and pith, makinsj; irre.iju- 

 lar, lon.e^itudinal cliannels, sometimes hollowing the stem completely 

 out. Durinj; the second week of July, pupa^ were found, this stage 

 taking place in the larval channels. During the last week of July 

 and first week of August adults api)car, having emerged through cir- 

 cular holes in the stem. 



This completes the first brood. During the last of August and 

 lirst part of September, these adults deposit eggs in the seed pods 

 of Asclcpias piilchra. these being laid singly inside the pod just be- 

 neath the outer covering. Egg punctures can be located by the 

 reddish discolorations around them. A small amount of sap runs 

 from these punctures but nothing like the amount which exudes 

 from syriaca seed pods when punctured by Uncaticollls. From one 

 to nine eggs were found in a single pod. After hatching the larvse 

 feed on the developing seeds usually in the centre of the mass 

 and when full grown pupate in cells composed of frass. etc., in the 

 middle basal portion of the seed cluster. During the first part of 

 October many pupje were found. By this time all of the infested pods 

 had split open on one side exposing the seeds; the seeds however 

 do not disperse being webbed up and held together. During the 

 first ten days of October the beetles leave the infested seeds and dis- 

 appear. Shortly afterward, the seeds and parts of seeds fall from 

 tiie plant. 



Egg. Slightly smaller, but otherwise similar to that of Uncati- 

 c oil is. 



L.\RV.\. Slightly smaller but otherwise apparently similar to that 

 of lincaticollis except that in specimens which we examined, there 

 appear to be slight variations in the arrangement of the body 

 hairs. There are also variations in the lengths of the body hairs 

 but on the whole, those of lincaticollis are slightly longer than those 

 of anncctans. 



Pl*p.\. A])parcntly similar to that of lincaticollis except that the 

 tubercles, sjjines and hairs are weaker. Size slightly smaller than 

 that of lincaticollis. 



Adi'i.t. Khysscmatus anncctans. This was described by Casey 

 in 1895 (Annals X. V. Acad. Sci., VIII, p, 834) "from the Levette 

 cabinet but without labels" and probably from Indiana. 



