160 ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



Feeding record of two adults — male andjemaie. 

 [Food: I'^lm leaf-beetle larvae.] 



« Female only. 



In addition to the elm leaf -beetle larvae, the two adults destreyed 

 an unknown lepidopterous larva about an inch in length on July 16, 

 and betAveen August 20 and 29 they destroyed and partially ate six 

 full-grown rosy-striped oak worms {Anisota rirginiensis Dru.). 



The tables given aboA^e show 246 as the total number of elm leaf- 

 beetle larva' destroyed by the two bugs in the fifth nymphal and adult 

 stages. The total number of days covered by the life of the female in 

 these two stages being 59 and by the male 50, the average number of 

 beetle larvse destroyed by each bug per day is 2.3. In the adult stage 

 alone the daily average is practically the same. 



SUMMARY. 



The more important observations recorded in the foregoing para- 

 graphs may be summarized as follows : 



(1) Parents and progeny of Podisus maculiventris exhibit striking 

 variations in form and color which might readily be mistaken for 

 specific characters. 



(2) Egg laying began on the ninth day after the female became 

 adult and extended over a period of forty days, the rate of production 

 apparently depending largely on the prevailing temperature. Eight- 

 een batches, wnth a total of 492 eggs, were deposited by a single 

 female. 



