573 



scales. Most of the reports of injury are from the northern half of the 

 iState, and although the scale occurs in the southern half, it is seldom 

 harmful. Examination of scales during the winter of 1912-13 showed 

 that a temperature of — 32° F. killed the eggs. That they did not 

 surviv^e this temperature is shown by the fact that the scale did not 

 breed in the area north of the -- 32° isotherm in the summer of 1912. 

 Where the minimum temperature was — 31°, many scales survived 

 in the autumn of 1912. The accuracy of these figures requires further 

 tests. In the winter of 1914-15, seven samples of scales examined 

 showed no sound eggs. The insect had therefore not recovered from 

 the check received three years before. In 24 locahties, however, 

 sound eggs were present. 



Gillette (C. P.). Confusion of Rhopalosiphumhippophaes, Koch, and 

 Myzus bragii, Gillette. — Jl. Econ. Entom., Concord, viii, no. 3, 

 June 1915, pp. 375-379, 2 plates. 



The distinction between Bhopalosiplmm hippophaes, Koch, and 

 Myzus bragii, Gillette, is recorded, as there has been a confusion of 

 these species in Aphid literature. The following synonyms are given 

 of Rhopalosiphiim hippophaes, Koch, viz : — Phorodon galeopsidis, Pass., 

 and Myzus elaeagni, del Guercio. 



Britton (VV. E.). a Destructive Pine Sawfly introduced from Europe ; 



Diprion {Lophhyrus) simile, Hartig.- — Jl. Econ. Entom., Concord, 

 viii, no. 3, June 1915, pp. 379-382, 1 plate. 



The larvae of Lophyrus pini, L., (similis, Hart.), which is one of the 

 most injurious sawflies on European conifers, were found on 27th 

 August 1914 at New Haven, Conn., upon the foliage of pine trees, 

 though the means by which this pest was imported is unknown. The 

 eggs are laid in slits made along one of the ridges at the edge of the 

 needles. The full-grown larvae devour from 6 to 12 needles daily, 

 preferring the old needles. There are two generations each year, the 

 . summer cocoon being formed on the trees and the autumn cocoon at 

 their bases. In Europe, the destruction of needles, rubbish, etc.. at 

 the foot of the trees in autumn, is recommended. In Connecticut, 

 the larvae have been found on Pinus strohus (white pine), P. laricio 

 var. ausiriaca (Austrian pine), P. flexiUs and P. densi flora. The trees 

 were sprayed with lead arsenate in September. 



Kelly (E. 0. G.). The Southern Corn Leaf-Beetle.— C7.^. Dept. 

 Agric, Washington, D.C., Bull. no. 221, 16th June 1915, 11 pp., 

 6 figs, 2 plates. 



Observed in Louisiana maize fields in 1887 by F. M. Webster. 

 Myochroiis denticollis, Say (the southern corn leaf-beetle), was first 

 recorded as a serious pest of maize by the same entomologist from 

 Ohio in 1900. Observations in Louisiana, Ohio, Kansas, Texas and 

 Arkansas seem to indicate that the insect occurs in destructive abund- 

 ance on lands that have previously been devoted to pasture or lands 

 which have been allowed to lapse into a semi-wild condition, and 

 provide hibernating c^uarters for the adults. The species is widely 



