'^6 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 15 



Scientific Notes 



Paradichlorobenzene Records. Report on 18,000 peach trees 6 to 20 years old in 

 Berckmans Brotheis Orchards, Mayfield, Hancock County, Georgia, treated with 

 Paradichlorobenzol. 



Applied Removed 



Oct. 11-14, 1921 Nov. 22-25, 1921 



Examined 300 trees various ages and in all soils Nov. 22nd and 25th, 1921—2 

 live borers. 



Examined 55 trees various ages and in all soils February 6, 1922, found 2 borers in 

 1 Hiley tree 10 yr. old, on red soil. 



2 borers in 1 Belle, 7 yr. old, sandy loam soil. 



1 borer in 1 Belle 10 yr. old, " " " 



Labor for applying and removing paradichlorobenzol on 18,000 trees, $151.38. 

 This is accurate and includes every item of expense of application and removal, 

 but does not include cost of paradichlorobenzol, which was, including freight and' 

 hauling, $225.00. 



A. L. Q. 



The Dipterous Parasite of The Cottony Cushion Scale.— The synonymy of the 

 dipterous parasite, Cryptochaetum, has been under discussion for some years and in 

 order to settle the matter the writer collected a good series of individuals and for- 

 warded them to Professor Aldrich for identification. His reply will straighten out 

 the tangle. 



"I cannot satisfy myself that monophlebi is anything but a synonym of iceryae. 

 Both Skuse and Knab were misled by the figures accompanying Williston's first 

 description. Williston had nothing to do with this figure and published afterward a 

 corrected figure of the venation in his species. He distinctly stated that the wings 

 were "short broad," which agrees with his figure published later, but not at all with 

 the figure published in connection with his original description. So I believe you are 

 justified in continuing to call your species iceryae." 



E. O. EssiG 



The European red mite. Paratetranychus pilosus Can. and Franz, has long been 

 known in California as the citrus red spider, Tctranychus citri McGregor or more 

 often as T. mytilaspidis Riley. It occurs in the southern part of the state as a pest 

 both to citrus and deciduous fruit trees, while in the central and northern Coast 

 Counties, it is chiefly a pest of such deciduous fruit trees as ahnond, apple, prune, 

 peach, pear, cherry, etc. and passes the winter in the egg-stage on the same. 



The mite has apparently been widely distributed throughout the country, since 

 the eggs are so easily and obscurely carried on nursery stock, but it will probably 

 not become a pest in all localities. Besides California it is recorded from the West 

 in Oregon by Dr. H. E. Ewing and in Idaho by R. H. Smith. 



Specimens of eggs and mites of the western form could not be distinguished from 

 the European Red Mite by Dr. Philip Carman, who examined the material for us. 



E. O. EssiG 



