357 



EssiG (E. O.). The European Red Mite.— Mthly. Bull. Cal. Dept. 

 Agric, Sacramento, xi, no. 4, April 1922, pp. 409-411, 1 fig. 



Tetranychus citri, McGr. [R.A.E., A, v, 10], which occurs in great 

 numbers on deciduous fruit-trees as well as on Citrus in California, 

 is considered to be a synonym of Paratetranychus pilosus, C. & F. 

 [R.A.E., A, ix, 293]. 



A large number of eggs are laid on deciduous fruit-trees in the 

 autumn ; on such trees in the cooler parts of the coastal region the 

 winter is passed in the egg stage, whereas on Citrus in southern California 

 all stages may be found during the winter. This phenomenon suggests 

 a difference in species or a decided change of habits, which may be 

 due to ecological conditions. A comparison is made of the eggs of 

 P. pilosus, C. & F., Tetranychus telarius, L., and Bryobia pretiosa, 

 Koch, from which it is evident that they are quite distinct and easily 

 separated from one another. 



Whether the synonymy will remain as indicated is not certain, but 

 the present facts are sufficient to establish the identity of another 

 European immigrant likely to prove of great importance to citrus 

 cultivation. 



Strong (L. A.). Bureau of Plant Quarantine. Synopsis of Work 

 for the months of November and December 1921. — Mthly. Bull. 

 Cal. Dept. Agric, Sacramento, xi, no. 4, April 1922, pp. 413-420. 



The pests intercepted during November and December were : — 

 From Idaho, larvae of Cydia {Laspeyresia) pomonella on apples and 

 Hypera variabilis {Phytonomus posticus) in a potato car. From 

 Louisiana, Solenopsis sp. in banana cars ; Cylas formicarius in sweet 

 potatoes ; Lepidosaphes beckii, Parlatoria pergandei and Tetranychus 

 sp. on Florida grapefruit ; and L. beckii, P. pergandei, Chrysomphalus 

 aiirantii and Dialeurodes citri on oranges. From Nevada, Heterodera 

 radicicola in potatoes. From New York, Lepidopterous larvae and 

 Balaninus sp. in chestnuts ; Myzus rosarum and Tetranychus sp. on 

 roses ; Aspidiotus perniciosus and Cydia pomonella on apples ; and 

 Pseudococcus citri on Coleiis. From Oregon, Cydia pomonella and 

 Aspidiotus perniciosus on apples ; Lepidosaphes tilmi on cascara bark ; 

 Chionaspis pinifoliae on fir ; and Lepidosaphes beckii, L. gloveri, 

 Chrysomphalus aonidiim and Parlatoria pergandei on Florida-grown 

 grapefruit. From Washington, Aphodius pardalis in a potato car ; 

 Cydia pomonella and Aspidiotus perniciosus on apples ; and Lepido- 

 saphes beckii on Florida grapefruit. From Florida, Pseudococcus 

 bromeliae on pineapples ; Chrysomphalus dictyospermi on stems of 

 avocados ; C. aonidum on coconut ; and Lepidosaphes beckii on 

 grapefruit. From Mississippi, Dialeurodes citri on kumquat foliage. 

 From Missouri, Cydia (L.) pomonella and Aspidiotus perniciosus on 

 apples ; and Lepidosaphes beckii and Parlatoria pergandei on Florida 

 grapefruit. From Pennsylvania, A . perniciosus on apples. From Texas, 

 Cylas formicarius on sweet potatoes ; and Lepidosaphes beckii, Parla- 

 toria pergandei and Chrysomphalus aonidum on grapefruit. From Utah, 

 Cydia pomonella on apples ; and L. beckii and P. pergandei on Florida 

 grapefruit. From Arizona, Pseudococcus sp. and Bryobia pratensis on 

 ornamental plants. From Alabama, Chrysomphalus aonidum and 

 Lepidosaphes beckii on oranges, the latter also on tangerines. From 

 Maryland, Chrysomphalus aurantii on lemons. From Illinois, Aspidiotus 

 perniciosus and Cydia pomonella on apples ; and Parlatoria pergandei. 



