23 



pounced upon its middle and stung it there. This resulted in 

 vigorous contortions of the caterpillar particularly of the anal 

 end. Later she returned to feed at the wound inflicted by the 

 sting. She afterward began working about the thoracic re- 

 gion and apparently succeeded in inflicting a ventral sting 

 near the middle legs after several apparently fruitless efforts 

 in the head region she proceeded to the anal region, where her 

 efforts to sting created another great commotion and contor- 

 tibns, during which she hung on by use of her legs and man- 

 dibles and made many attempts to sting but apparently un- 

 successfully. She then returned to the head and made several 

 efforts to sting there both dorsal and ventral. The struggles 

 seemed to exhaust her but she remained with the larva which 

 became quiescent. Two hours later she had deposited two eggs. 

 A female placed with the grub of Araecerus fasciculatus 

 after a time attacked it vigorously, the gTub making the most 

 violent contortions in its attempts to dislodge the Perisierola. 

 She had attacked it at the anal extremity and was keeping 

 hold with her mandibles and hind legs and was constantly at- 

 tempting stinging. Both finally became exhausted and when 

 the gi'ub was becoming quiescent the Perisierola attempted to 

 pierce the skin of the mid-ventral region and apparently suc- 

 ceeded and fed and then rested for some time on the grub 

 now straightened out on its back. From time to time she would 

 abandon the grub and run away, but always returned. 



2. SiEROLA Attacking the Larvae of Cryptophlebia vul- 

 PEs lisr the Youxg Pods of Acacia koa. 



Where the ridge leading from Punchbowl to Mt. Tantalus 

 joins the latter and the sharp ascent up to the Tantalus peak 

 begins there are a number of koa trees upon which I have 

 never failed to find adult Sierolae whenever looked for, but 

 until June 23, 1918, I had not been able to find to what lepi- 

 dopterous larvae they are attached. Sweeping the foliage and 

 opening the young pods of the koa then revealed the presence 

 of four species of Sierola upon the Acacia koa and one at least 



