253 



up/)!! this or upon any of tlie adjacent trees, and Mr. Snow informed 

 me that he had never found these insects in tlieir early stages upon any 

 of his trees. 



From Mr. Snow I learned that a colony of about thirty adult speci- 

 mens of Orcm chalyheuSj received from Mr. Lelong at tlie same time 

 that Mr. Snow had received liis, had been placed ui)on an orange tree 

 in the grove of Mr. S. W. Preble, near Tustin. Mr. Preble was absent, 

 but his foreman showed me the tree upon which the colony of imported 

 insects had been placed. I was not able to find any of these insects 

 either upon this or any of the adjacent trees. 



I next visited Mr. Hiram Hamilton, of Orange, in Orange County^ 

 and learned from him that he had received two colonies of imported in- 

 sects from Mr. Lelong. The first colony was received during the last 

 half of February, and consisted of six specimens of Oreus ehalybeus and 

 a single specimen of an undetermined Scymnid. These he placed in a 

 glass jar and supplied them with Aspid lotus aurantii to serve as food, 

 but they finally died without depositing eggs. The second colony 

 readied him during the first half of July, and consisted of about seventy 

 specimens of Orcus chalyheus, two Leis conformis, and six specimens of 

 an undetermined Scymnid. These were placed upon an orange tree 

 thickly infested with Asjndiotus aurantii, but neither Mr. Hamilton nor 

 myself was able to find any trace of them either upon this or any of the 

 adjacent trees, and Mr. Hamilton informed me that he had never found 

 either the larva or pupa of any of the imported insects upon any of 

 these trees. 



This completed my investigation of the imported insects received and 

 sent out by Mr. Lelong. Of the nine colonies of Orcus clialyheus fchus 

 sent out by him, not a trace of a single one of them can be found at the 

 present time 5 and out of the entire number of colonies of insects, only 

 one — that at Alameda — has succeeded in maintaining itself \\p to the 

 present time. 



On the 26th of October, in company with Mr. John Scott, the Horti- 

 cultural Commissioner of Los Angeles County, I paid a visit to Mr. 

 Ellwood Cooper, near Santa Barbara, and learned from him that he 

 had received two colonies of the imported insects from Mr. Koebele. 

 The first colony was received during the first half of June, and consisted 

 of about two dozen specimens of Orcus australasiw besides a few speci- 

 mens of an undetermined species of Ehizobius. The second colony was 

 received during the first half of July, and consisted of about four hun- 

 dred specimens of Orcus australasiw and Orcus ehalybeus, principally 

 the former, also a few specimens of the Ehizobius and a box containing 

 the larvae and chrysalides of Thalpochares coccipliaga. The latter was 

 placed in an olive tree infested with Lecanium olew, the lid of the box 

 having first been removed and a piece of wire-screen placed over the 

 box, the meshes in this screen being large enough to admit of the es- 

 cape of the moths. The remaining insects were liberated among some 



