150 



From the material we received from the California State In- 

 sectary containing parasites of the Mealybug, we were very suc- 

 cessful in rearing a large quantity of parasites (Paraleptomastix 

 alviormis). Some of these have been placed in breeding cages 

 for further multiplication and we were able to liberate 1522 in 

 various places where the Citrus mealy bug was found. It is un- 

 fortunate that this species will not attack the Alligator pear 

 mealy bug (Pseudococcus nipae) as this is the worst species we 

 have in the Islands. Many of our Ladybugs have reduced other 

 species so that we rarely have complaint of their damage. They 

 also make inroads on the species attacking the Alligator pear 

 and other plants, but not to a great extent. As the new parasite 

 is more inclined to attack the citrus mealybug and as this pest is 

 not very abundant on account of Ladybug attack, it will be dif- 

 ficult to say whether or not we shall be successful in establishing 

 it here. We have also other Hymenopterous parasites attacking 

 Mealybugs so that we are perhaps well protected on certain 

 species but we should try to get a specific parasite for the species 

 attacking the Alligator pear. Fig. Guava and many other plants 

 as the damage done to new growth and blossoms by this species 

 is very serious. 



Some very encouraging letters have been received from Mr. 

 D. T. Fullaway, who is now at Manila, where he is breeding up 

 an Opitis species parasitic on the Melon fly (Bactrocera ci.icur- 

 hitae). He seems very much encouraged by the results he has 

 obtained there and hopes soon to be able to return here with a 

 good supply for propagation. 



We are now planting some Momordica charantia, a Chinese 

 gourd, as well as Cucumber seeds at intervals, so as to have 

 plenty of infested material ready for him when he arrives. 



Owing to the scarcity of fruit, we have been breeding the va- 

 rious fruit fly parasites on a limited scale only. In fact our 

 main endeavor is to keep alive all the species which have been 

 introduced including the species for Horn, House and Stable fly 

 until such time when we can be satisfied that they are well estab- 

 lished in the field. As it is now we have taken all except two 

 species in the field and these two species, Galesus silvestrii and 

 Dirhinus giffardii, have been distributed by thousands under the 

 rnost favorable circumstances and yet we have not recovered 

 either species from material collected in the open. Our recovery 

 of the small species. Tetrastichus giffardii, from material col- 

 lected in the field is encouraging, althoug^h not as yet sufficient 

 to say definitely that the species is established, but of the other 

 species our findings give us some hope that they are fairly well 

 established. 



