. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Figure Characteristic appearance of a palm scale Eucalymnatus tessellatus (Signoret) when Inhabited by the pupa of Anicetus annulatus Timb. just what to expect from the establishment of the Japanese parasites in the California fauna. In 1913 a preliminary study of the California parasites of Coccus hesperidum was made by Mr. P. H. Timberlake, who reared them on the soft brown scale.* The life history of these parasites when at- tacking the citricola scale is supposedly the same as when att
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Figure Characteristic appearance of a palm scale Eucalymnatus tessellatus (Signoret) when Inhabited by the pupa of Anicetus annulatus Timb. just what to expect from the establishment of the Japanese parasites in the California fauna. In 1913 a preliminary study of the California parasites of Coccus hesperidum was made by Mr. P. H. Timberlake, who reared them on the soft brown scale.* The life history of these parasites when at- tacking the citricola scale is supposedly the same as when attacking the soft brown scale. Aphycus luteolus Timb., mentioned by Tim- berlake under the name Aphycus sp. near flavus How., holds first place as an enemy of the citricola scale in California. Coccophagus lecanii (Fitch) is probably entitled to second place, followed by Cocco- phagus lunulatus (How.) and Microterys flavus (How.). A fifth species Aphycus alberti (How.) mentioned by Timberlake as Aphycus n. sp. in his paper and said to be extremely rare, has recently been reared in considerable numbers from the soft brown scale in Pasadena. It seems likely that this species will be found working on the citricola scale also. There are several hyperparasites in the local fauna which will probably prove detrimental to certain of the parasites of the citricola scale if they ever become very abundant. Timberlake records six hyperparasites, four of them obligatory internal parasites of Micro- terys and Aphycus. The other species, one determined as Perissop- terus javensis How. and the other Pachyneuron sp., were reared from the soft brown scale but their host was not determined. Mention is also made of an Anicetus sp. which was taken at Sacramento. Ac- cording to Mr. Timberlake it is the parasite mentioned as Anicetus annulatus Timb. in this paper. In addition to Timberlake's record. Tetrastichus blepyri Ash. can be listed as one more species actuallj' reared from the soft brown scale.
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