290 



number of specimens of the same parasite from AspidioUts perniciosus, 

 and Mr. E. M. Eluhorn states that it is the most abundant parasite of 

 this species around San Francisco. Mr. Ehrhorn also reared from the 

 same scale insect ApheUnus mytllatipidis LeBarou, and AHpUJiotiplKujus 

 citrimis (Craw). Mr. Alex. Craw, iu the report of the State Board of 

 Horticulture of California for 1801, made tlie statement that the 

 Aphelinus fuscipennis just mentioned had been found doing such 

 efiec'ive work in subduing the San Jose scale in an orchard in the 

 neighborhood of Los Angeles that the complete restoration of the 

 orchard was conrtdently looked for. Mr. Coquillett informs mo, how- 

 ever, that whde this orchard did recover to a very large extent, it 

 afterwards became reinfested, and he is not at all sure that the partial 

 restoration was due to the work of this parasite. Several times in his 

 experience lie has seen trees recover and the scales die off, without 

 apparent cause. No exit holes of parasites were found in the scales? 

 and the insects seemed to have died from some disease. A figure of 

 AphelinuH diaspidis is introduced, which M'ill assist in the identificatiou 

 oi A.fuHcipennis^ the only eastern parasite yet found.* 



Fig. 29. — Apheauus diat^pidis Eow. ; j^reiiily enlarged (Iroai Insect Life). 



NEW FACTS AS TO THE ORIGINAL HOME OF THE SPECIES. 



At the time of the printing of Circular No. 3, in April 1894, I was 

 obliged to follow the latest California utterances on the subject of the 

 probable original home of the San Jose scale, and stated that it was, 

 according to the most trustworthy authority, first brought to California 

 on trees imported from Chile by the late James Lick, about 1870. 

 This statement Avas derived from a paper read by Mr. Alex. Craw 

 before one of the California Horticultural Couventions, and Mr. Craw 

 gave as his authority Mr. John Britton. I have since corresponded 



* Since this was written a single specimen of Anaphes gracilis How. Avas reared 

 from specimens of the scale collectetl at Riverside, Md. The type of this species was 

 reared in 1880 from Mytilaspls pomorum, the common oyster shell bark-louse of the 

 apple. 



