187 APPENDIX D 



hymenopterous parasites reared from Musca domestica. All 

 the parasites belong to the family Pteromalidae and the 

 three generic forms which predominated were Spalangia, 

 Latreille; Muscidifurax, Girault and Sanders; and Nasonia, 

 Ashmead. One species of the last genus only is described in 

 the first paper of the series, namely, Nasonia brevicornis, 

 Ashmead. 



Nasonia brevicomis, Ashmead. 



It was found that this small parasite which is very 

 sluggish in its movements attacked the larvse and pupaB of 

 Musca domestica in confinement. A number of males and 

 females were reared from the pupae of M. domestica. The 

 female of N. brevicornis varies in length from 1 mm. to 2'30 

 mm., and is of a metallic dark brassy green colour, the eyes 

 are garnet. The male is about one-third smaller than the 

 female, varying in length from 0'60 mm. to 2*00 mm. It is 

 lighter in colour, more brassy in appearance, metallic and 

 green; the eyes are sometimes a brilliant carmine. 



