482 



bruchiis larva though it probably takes place. In captivity I 

 have succeeded in getting the Heterospilus to oviposit in the 

 cocoon of Caryohoriis gonagra though as yet I cannot say if it 

 will develop at its expense. I have not found it attacking it in 

 nature. Doubtless it will be found parasitizing the other spe- 

 cies of Bruclms whenever favorable conditions offer in the 

 field. 



I have been able to distinguish three larval stages in 

 Heterosiyilus and there are doubtless one or two intermediate 

 ones not observed. The first resembles in a general way the 

 first larval stage of the Opiine Braconids, as observed by Mr. 

 Pemberton, though the head is, perhaps, somewhat less chitin- 

 ized. The second stage is fusiform and somewhat flattened 

 and the head is without mandibles. It is migratory and so far 

 as I have been able to learn usually locates itself in a dorsal 

 position on its host, in the cases observed upon the thorax. 

 The final larva is of the usual cruciform type with mandibles 

 and feebly chitinized head. The full-grown larva spins an 

 elliptical brownish white silken cocoon within the pupal cham- 

 ber of the l)ruchus host and the adult emerges from the seed 

 or pod of the host plant through a circular emergence hole 

 somewhat smaller than that of the bruchus 



Heterospilus prosopidis is quite variable in size according 

 to the size of its host. Those from Bruchus prosopis, the 

 largest of its local hosts, being much larger than those from the 

 little Bruchus pruininus. 



On account of the brief period in the life of its hosts in 

 which it can attack them, only a small proportion are parasit- 

 ized, certainly not more than 10-15%. It would seem there- 

 fore to be of but minor importance in the control of Bruchids. 

 I should not expect it to attack Bruchids in stored peas and 

 beans. 



A K'ew Scleroderma Attacking Bruch'idae. 



Early in November, 1017, while examining old pods of 

 Prosopis jidiflora on John Ena road, Waikiki, I found a fe- 

 male Scleroderma which, however, escaped before I could exam- 



