119 



A total of 161 colonies, of 21 species of insects ; an aggre- 

 gate of some 5000 specimens. 



III. BREEDING AND STUDY OF ECONOMIC INSECTS 

 ALREADY ESTABLISHED HERE. 



In many instances the insects sent in by correspondents or 

 collected by the office force were immature and had to be bred 

 to maturity before their identity could be determined, since, 

 with the exception of the "mealy-wing" or "white flies" 

 {Aleyrodidae) , insects could be definitely named only in the 

 adult stage. Owing to the great abundance of parasitic in- 

 sects one is not infrequently surprised by finding in the breed- 

 ing jar the parasite instead of the host. In case of a parasite 

 that confines itself to a single species of host the latter could 

 be determined by the identity of the former. In the majority 

 of parasites thus far bred, however, they are not confined to a 

 single species of host, in which case, in order to determine the 

 particular host under investigation a repetition of breeding 

 becomes necessary. This question will appear in more tangible 

 form in the appended paper on the horn fly parasite. 



USEFUL INSECTS. 



A determined effort was made to investigate the lantana in- 

 sects. This investigation is not yet complete, but a prelimin- 

 ary paper on these was read before the Hawaiian Stock Breed- 

 ers' Association at their annual meeting on December 18, 

 1905, and is submitted herewith. 



PRELIMnSTARY NOTES ON LANTANA INSECTS IN HAWAII. 



LANTANA SEED FLY (Af/romuzid). 



Of the lantana insects introduced into Hawaii by Mr. Albert 

 Koebele several years ago, those that were established are 

 now the most common lantana insects throughout these Islands. 

 By far the most important of them, as it is also the most 

 active and abundant, is the small black fly (Fig. 3), the 

 maggots of which live in and destro.y the seed. Favored 

 bv climatic conditions and abundance of food, and unchecked 



