476 Phylum Arthropoda 



exterior, and begins construction of the pupal cell. The duration of 

 the prepupal stage varies with the temperature and humidity. In the 

 laboratory, where it was warm and dry, this period lasted, on an average 

 of 15 days, while in the insectary, under normal conditions, it was much 

 longer, lasting from 23 to 63 days. In the laboratory, pupation began 

 as early as August 23, while in the field the first pupae were found on 

 September 11. 



In the laboratory the pupa began to show the characteristic markings 

 of the adult by the middle of October. However, they did not trans- 

 form to adults until the following February. In the field the winter is 

 passed in the pupal stage. 



M. E. D. 



Bibliography 



Garman, H. 1 91 6. The locust borer (Cyllene robiniae) and other insect enemies 

 of the black locust. Ky. Agric. Exper. Sta. Bull. 200:99. 



Family 



CHRYSOMELIDAE 



CALLIGRAPHA PNIRSA* 



TWENTY adults, captured late in May, were placed in a cage with 

 freshly gathered basswood leaves on which they began to feed 

 almost at once. 



The next morning after the introduction of the adults, several egg 

 masses were found, attached to the leaves in the cage. They were 

 placed on end in the same fashion as those of the well known Leptino- 

 tarsa decemlineata. 



These eggs began to hatch in just 7 days. The young, almost as soon 

 as they were out of the egg, fed eagerly and continuously on the bass- 

 wood leaves and grew rapidly. They were confined in glass covered 

 plant crocks partly filled with moist earth and were supplied with fresh 

 basswood leaves. The larvae readily accepted the situation and throve 

 in confinement.** 



♦Abstracted from an article in Canad. Ent. 57:209, 1925, by the late C. X. Ainslie, 

 U. S. Bureau of Entomology and Plant Quarantine. 



** Editor's Note: As reported by Milton T. Goe in Ent. Xews 29:224, 1918, plants of 

 the dock species, Rumex crispus and R. obtusij olius are the favorite hosts of both adults 

 and larvae of Gastroidea caesia. Rhubarb was the only cultivated plant on which they 

 would feed in confinement, though they were tested on many, and they would readily 

 leave it if supplied with dock. Eggs found in masses on the under side of leaves hatched 

 in about 10 days. The larvae were kept as above described and provided with fresh dock 

 leaves daily. They entered the soil to pupate and emerged as adults about 2 weeks later. 



M. E. D. 



