76 



THE EEPOET OF THE 



No. 3G 



' Third Eei^ort of the Insects of Missouri/ recorded them as very destructive in 

 the Eastern States in 1867 and 1868. In his second Eeport in 1870, he says 

 regarding the caterpillars, " For a number of days last June in Western New 

 York they might have been seen marching single file up the railroad track on 

 Pilot Knob in the scorching rays of the noon day sun." Bethuno (' First Ann. 

 Eep. Ent. Soc. Ont.,' p. 15) reported them as very abundant in Western Ontario 

 in 1870, but said they had decreased east of Toronto. In 1872 Saunders says 

 of the same district (' Can. Ent.,' 4, p. 13-4) "We have not met with a single full 

 grown specimen this year although in years past they have swarmed on our trees 

 and fences." This outbreak thus covered a period of about five years, 1866 to 

 1870, and the resultant damage was very much greater than any previously 

 reported from this species. 



Eastern 'Region 



General OuihKok 



Local Tiavages 



Very •Scarce 



Central flcgion 



Gtnera/ Outbreak 



Local TfayaytTi 



mi 7?ed /Jvo Tecc "^ leB Teso /ete «» "mw Tex /eeo «w 7^ mi 7?a 



TT 



Wester /I 'Region 



Genera/ Oui-break 



LocqI Havai^es 



Very Scarce 



/r/o /7S0 iTW /SCO /a/0 



/esc /8*c /&S0 /abo 



/aao /Sfc 7K0 im 7n/^ 



History of the Forest Tent Caterpillar in North America. The dotted lines 

 indicate the abundance of the insect. 



Four years after their disappearance, Mr. H. H. Lyman, of Montreal, pub- 

 lished an account of the unusual abundance of the insect. . In the Canadian 

 Entomologist, Vol. 6, p. 158, he says, "The caterpillars of this pest are swarming 

 on almost every description of tree or shrub i]i the vicinity, many trees being 

 completely denuded of foliage." 



This was the first notice of another outbreak and the following notes throw 

 some light on its severity and distribution. " The Forest Tent Caterpillar was 

 excessively alnindant and destructive to fruit and forest trees in many parts of 



