XXxii, '21] ENTOMOLOGICAL NEWS 189 



tungen. 116, xxxiv. 106. Weiss & West Additional fungous in- 

 sects and their hosts. 54, xxxiv, 5'J 6 



Blatchley, W. S. Notes on Indiana Halticini with characterization 

 of a new genus and descriptions of new species. 6, xxix, 16-27. 

 Portevin, G. Silphides nouveaux de la collection du museum. 99, 

 1920, 505-8 



HYMENOPTERA. Emery, C. Specific names repeated in the 

 Linnean genus Formica. 5, xxviii, 2-1-fi. Herbst, P. Un nucvo 

 jenero de avispa^ ravadoras (Sphegidae). 121, xi, 217-20. Montet, 

 G. Hymenopteres nouveaux du genre Pepsis de 'la collection du 

 museum d'histoire naturelle de (Jem-ye. 80, xxviii, 205-10. Porter, 

 C. E. Un nuevo braconido del stir de Chili.. 121, xi, 215-t;. Ste- 

 vens, O. A. Further notes on evening flowers, Panurgine and 

 Halictine bees. 4, liii, r>5-<). Wheeler, W. M. Professor Emery's 

 subgenera of the genus Camponotus. 5, xxviii, 16-19. 



Banks, N. New Nearctic fossorial H. 7, xiv, 1<i-2(>. Fenton, 

 F. A. New parasitic H. of the subfamily Anteoninae. 4, liii, 70-1. 

 MacGillivray, A. D. New species of Nematinac. 6, xxix, 27-35. 



SOME SOIL FUMIGATION EXPERIMENTS WITH PARADICHI.OROBENZINE 

 FOR THE CONTROL OF THE PEACH-TREE BORER, SANNINOIDEA EXITIOSA 

 SAY. by ALVAH PETERSON (Soil Science, vol. xi, No. 4, pp. 305-318, pi. 

 1, April, 1921). This paper deals with paradichlorobenzine as a soil 

 fumigant, taking into consideration such factors as soil texture, acidity, 

 alkalinity, moisture and temperature, methods and time of application, 

 effects on trees and borers, and costs and represents the results of num- 

 erous and varied experiments conducted by Dr. Peterson since 1917. 

 Topics receiving consideration are: strength of application, injury to 

 trees, short exposures, time of application, method of application, soil 

 conditions, especially temperature and moisture, costs and rate of evap- 

 oration of material. Tables are presented showing the results of short 

 exposures and early and late summer treatments in various types of soil 

 and also the influence of soil moisture and temperature. The author 

 concludes that paradichlorobcmine gives considerable promise as a val- 

 uable insecticide for the control of the peach-tree borer; that the use of 

 this material is still in the experimental stage and recommends that 

 peach growers be encouraged to try out this substance for a year or 

 so on a small block of trees 6 years of age or older before treating 

 large plantings. From three-fourths to one ounce of paradichloroben- 

 zine will kill 90 to 100 per cent of the borrrs if the soil temperatur- 

 55 to 60 degrees F., or higher, and if the soil is not too wet. The mar- 

 gin of safety is considerable if the trees treated are 6 years old 01 ovei 



The finely divided crystals should be evenly distributed in a narrow, 



