38 



not an insect surviving on the ground where they had fed. The 

 greatest damage was caused in vineyards and orchards, where the 

 new growth was eaten off, death to the plant frequently resulting. 

 Bran mash poisoned with arsenic gave very little success ; the most 

 successful method proved to be the flooding of the orchard or vineyard 

 for a few hours. This drove the crickets away for a time and gave 

 the plants an opportunity to recover. By 1st June the crickets had 

 completely disappeared. 



Pettit (R. H.). Thrips injuring Peaches. — Jl. Econ. Entom., Concord, 

 N.H., xi, no. 5, October 1918, pp. 434-435. 



Frankliniella (Euthrips) tritici, Fitch, which is well-known to injui'e 

 strawberries, is recorded as blemishing the skin of peaches, producing 

 shallow, gummed scars on the fruit, which spoil its appearance. While 

 the peaches are quite small and developing rapidly patches of slightly 

 discoloured fuzz can be seen, which are found to contain the thrips, 

 and the skin underneath is scarred. As the damage all seems to 

 be done before the pits begin to harden, that is, before thinning time, 

 many of the blemished fruits can be removed during thinning. The 

 injury is apparently most severe in the highest, driest and warmest 

 parts of the orchards and during seasons when the spring is hot and dry. 



Faust (E. C). A New Tyroglyphid for Western Montana (Acar.).— 



Entom. News, Philadelphia, xxix, no. 9, November 1918, 

 pp. 336-340, 1 plate. 



This paper describes Rhizoglyphus sagitMae, sp. n., taken in 

 Western Montana, where it was found feeding upon the juicy parts 

 of new leaves of the balsam-root plant, Balsamorrhiza sagiUata. A 

 description of the mite is given and its relation to the allied species 

 R. hyacinthi and R. rhizophagus is shown in a table. 



Ferris (G. F.). The Alleged Occurrence of a Seasonal Dimorphism in 

 the Females of certain Species of Mealy Bugs (Hemiptera; 

 Coccidae). — Entom. News, Philadelphia, xxix, no. 9, November 

 1918, pp. 349-352. 



Various authors have expressed the opinion that the females of 

 certain species of Phenacoccus and Pseudococcus are seasonally dimor- 

 phic. The present paper is written to show that in certain of these 

 cases the alleged dimorphism does not exist, and the author questions 

 whether it ever occurs among these insects. In the case of Pseudo- 

 coccus agrifoliae, Essig, the types examined by the author contain 

 specimens of three species belonging to as many different genera. 

 One of these is that previously described by Ehrhorn as Ripersia 

 villosa, another is a new species that will be described elsewhere as 

 P. quercicolus, and the third, which is represented only by immature 

 specimens, is unmistakably a species of Ceroputo. The only apparent 

 reason for regarding these as forms of the same species is the fact 

 that they were found upon the same host ; morphologically they are 

 very different. P. quercicolus is quite common on oaks in the vicinity 

 of Stanford University, and has only one generation in a year. The 

 winter is passed in the first or second larval stage, maturity being 

 reached in Mav or June. 



