202 



Journal of Agricultural Research 



Vol. VI. No. s 



The author has depended upon head measurements in distinguishing 

 the instars; a key for this purpose (Table III) has proved satisfactory. 

 As will be seen from the table, it is only necessary to consider the width 

 of the head. 



Table III. — Key for detennining the larval instars of Hyperaspis binotata according to 



width of head 



THE PUPA 



The pupal period lasts for from 10 to 13 days, averaging 12 days. 

 Pupae appear in the field early in July and are most abundant from 

 the 7th to the 20th of the month. They are found, surrounded by 

 the last larval skin, attached to leaves or concealed in clusters under 

 bark. An occasional one may be found as late as October. 



NATURAL ENEMIES 



There seem to be very few enemies of this ladybird. No parasites 

 were obtained, and no birds were obser\'^ed to feed upon it. Aphis 

 lions were found preying upon the eggs, and a common plant bug, 

 Brochymena sp., was taken upon two occasions with this coccinellid 

 impaled upon its beak. 



SUMMARY 



Hyperaspis binotata Say is found 

 westward to the semiarid region, 

 bodied scales and is very effective 

 scale and the terrapin scale. The 

 deposited singly on twigs adjacent to 

 39 days and is as follows: Incubation, 

 instar, 2 days; third instar, 3 days; 

 days. 



in the eastern United States and 

 It feeds upon aphides and soft- 

 in controlling the cottony maple 

 eggs are salmon-colored and are 

 the hosts. The life cycle requires 

 7 days; first instar, 3 days; second 

 fourth instar, 12 days; pupa, 12 



