252 I 



him I learned that about the middle of May Mr. Leloug had erected a 

 cloth tent over oue of his lemou trees quite thickly infested with Leca- 

 nhim olecc, and had introduced about a dozen moths of Thalpochares 

 cocciphiuia into this tent. About the 1st of October the tent was re- 

 moved, and at that time no trace of these insects could be found upon 

 this tree. Dr. Kimball informed me that about two months ago Mr. 

 Lelong liberated several of these moths in his orange grove, and that 

 about the middle of May he had liberated several adults of Orcus 

 chalyheuH in the same grove. Mr. Koebele informed me that he had 

 liberated in this grove the moths of Thalpocliores coccipliaga brought 

 with him from Australia in August. I did not succeed in finding a 

 trace of any of these insects, and Dr. Kimball informed me that he has 

 not been able to find any of them in any of their stages. While at 

 Alameda, Mr. Koebele informed me that he had carefully examined this 

 grove about three weeks previously, but had been unable to find any 

 of the imported insects in any of their stages. 



On the 22d of October I proceeded to Santa Clara, in Santa Clara 

 County, for the purpose of investigating the colony of insects- sent by 

 Mr. Lelong to Mr. A. Block. Mr. Block was absent, but his foreman 

 informed me that a colony of Orcus clialyhens had been placed upon one 

 of his pear trees infested with Aspidiotus pcrniciosus. 1 was not able 

 to find a trace of this Orcus upon any of the trees. 



On the 28th of October I called upon Col. J. E. Dobbins, of San Ga- 

 briel, in Los Angeles County, and learned from him that about the 

 middle of May he had received about a dozen adults of Orcus chalybeus 

 from Mr. Lelong and had placed them upon one of his lemon trees 

 thickly infested with Aspidiotus citrinus; but neither of us was able to 

 find a trace of the Orcus upon this or upon any of the adjacent trees, 

 and Mr. Dobbins informed me that he has never found this insect in 

 any of its preparatory stages in any part of his or of the neighboring 

 orange and lemon groves. 



In company with Mr. Dobbins I next visited Mr. A. Scott Chapman, 

 near San Gabriel, and learned from him that during the first half of 

 July he had received from Mr. Lelong a colony of about one hundred 

 and fifty adult specimens of Orcus chalybeus and a single specimen of 

 Orcus australasiic; these he had placed upon one of his lemon trees in- 

 fested with Aspidiotus citriuus, but neither myself nor Mr. Dobbins 

 was able to find a trace of them upon this or any of the adjacent trees, 

 and Mr. Chapman informed me that he has never found these lady- 

 birds in their early stages upon any of his trees. 



On the following day I visited Mr, H. K. Snow, of Tustin, in Orange 

 County, and learned from him that during the last half of February he 

 had received from Mr. Lelong about forty adult specimens of Orcvs 

 chalybeus and two specimens of Leis conformis. These he had placed 

 on one of his orange trees thickly infested vr\th Aspidiotus aurantii; 

 but neither of us was able to find a trace of the imported insects either 



