338 Insect Pests. 



(3) Whitehead, Sir C. Report on Insects Injurious to Fruit Crops, p. 29 



(1886). 



(4) Ormerod, E. A. Report on Injurious Insects for 1887. Eleventh Report, 



p. 90 (1888). 



(5) Peck. ' Natural History of the Slugworm.' (Boston). 



(6) Curtis, J. Gardeners' Chronicle, p. 692 (1842). 



(7) Westwood, J. 0. Gardeners' Chronicle, p. 524 (1848). 



(8) Ormerod, E. A. ' Manual of Injurious Insects,' pp. 324-326 (1890). 



(9) Lintner, J. A. Ninth Report of the New York State Entomologist, p. 33 



(1893). 



(10) Harrington, W. H. Twenty-fourth Report of the Entomological Society 



of Ontario, p. 22 (1894). 



(11) Theobald, F. V. Journal S. E. Agricultural College. No. 4, p. 5 (1896). 



THE SOCIAL PEAR SAWFLY. 

 (PamphUus fldvii'entri*. Cameron.) 



Occasional inquiries are sent regarding the Social Pear Sawfly 

 (Fampliilux flaviventris). AA r estwood (4) wrote on it in 1851. In 

 1889, and again in 1900, there seems to have been a considerable 

 amount of this pest about in the south and south-east of England, 

 in some cases considerable damage to pear trees has been caused 

 by the larvre. The larva? are very ravenous, especially towards 

 the close of their life. Large pear trees may be stripped of their 

 foliage by colonies of this insect. It does not seem to be a very 

 common annual pest, yet in certain years it causes an appreciable 

 loss in orchards and gardens. 



It is known also as the Pear Lyda or the Web-spinning Pear 

 Sawfly. 



The insect is known under a great variety of scientific names. 

 Cameron (3) mentions the following : Tenthrcdo flaviventris,, Eetz. ; 

 T. pyri, Schrank ; T. lutescens, Pz. ; Lyda clypcata, Klug. ; L. sylvatica, 

 Newman; L. albifrons, Fall.; L. fasciata, Curtis; L. pyri, Zad. The 

 insect is widely distributed in England. I have not been able to 

 find it in Wales, and Cameron says he has not found it in Scotland. 

 In Europe it is found in Germany, Sweden, Holland, Italy and 

 France. 



Kollar (5) wrote on this species under the name Tenthrcdo 

 h(cmorrlioidali$, Fabr., and refers to it attacking the plum. 



During 1889 and 1890 several "tents" existed in my garden, 

 and I was thus enabled to make observations on them, which are 

 recorded here, together witli notes sent me by correspondents. 



