19 



9. Parasites of Brl'ciiidae in Stoeage. 



The practical unimportance of parasites in the control of 

 Bruchidae in stored products was illustrated by conditions in 

 Maui. On account of the shortage of labor due to the war 

 some beans, cowpeas and pigeon peas had been neglected and 

 the latter were heavily infested with Bruchus guadHmaculatus. 

 They were so numerous that thousands of the adults were sifted 

 out and practically every one of the cowpeas and pigeon peas 

 stored in loose burlap bags had been destroyed, yet the para- 

 sites — principally the Pteromalid supposed to be "Pteromaliis" 

 calandrae — were also present by the thousands. They are, 

 however, important in reducing the numbers of Bruchidae 

 which emerge from the stored products to scatter and infest the 

 stores elsewhere. Properly fumigated cowpeas and pigeon 

 peas, however, which had only the protection of muslin bags 

 were free from Bruchids. 



10. Chaetospila elegans Westwood. 



This species was taken at Grove Farm Mill, Haiku, Maui, 

 and in part bred out under conditions which make it certain 

 that it parasitizes both Calandra oryzae and Bruchus quadri- 

 maculatus. 



The male as yet undescribed has the antennae 10- jointed. 

 In both sexes wingless and fully winged forms occur with 

 all the intermediate stages between, the degree of wing reduc- 

 tion often differing in the wings of the same specimen. 



This feeble species seems of no importance in controlling 

 its hosts. 



11. UscAis'^A SEMiFUMiPEXxis Girault. 



Out of 5,000 seeds picked up principally in Thomas Square 

 in the heart of Honolulu, e3,000 bore eggs of Caryohorus go- 

 n-agra but only six of the larvae reached maturity. Parasitiza- 

 tion of the eggs by the TrichogTammatid, Uscana semifumi- 

 jyennis G-irault seemed to be bv far the lar2;est death factor. 



