122 



INSECTS INFESTING THE PEAR TREE. 



Fig. 99. 



Fig. iM). — IVar-leaf Saw-lly — colors, 

 black and yellow. 



Perfect insect (Fig. 99) — length of body, 

 three and three fourths lines ; expanse 

 of wings, about seven lines ; color, head 

 and thorax black, abdomen yellowish, 

 with a black transverse band on the dor- 

 sal half of each segment ; wings transpa- 

 rent, with a brownish hue. 



There is, apparently, only one brood 

 each year. 



Remedies. — As soon as the larva? appear, spray as directed 

 in Xo. 61, or 65; also, sec Xo. 62. 



CHAPTER LXIll. 



The Thrips. 



Order, Hemiptera; 

 Sub-order, Heteroptera ; 



Family, Thripid^. 



Fig. 100. 



[Feeding upon the ui)])er surface of the leaves of the pear, 

 peach, etc., minute black or yellow six-legged insects.] 



Last year, 1882, the owners of a great number of orchards 

 complained that the leaves of the pear, peach, and plum trees 

 were attacked by some insect or disease which caused them to 

 wither and fall off. On examination they were found to be 

 infested by a species of Thrips not heretofore noticed on fruit 

 trees in this State. 



Tlie leaves infested by these insects appeared 

 marked all over their surface with minute 

 black dots, either caused by the bite of these 

 minute insects or were their excrements. 

 Many of the branches, especially on the lower 

 part of the tree, were denuded of their foliage. 



Fig. 100. — Larva of T]n-ii)s — colors, l)rigbt 

 and dark yellow. 



Tlif larva (Fig. 100) of this species of 

 Thri})s is one twenty-sixth of an inch in 

 length ; color, ])rimrose-yellow, Avith narrow 



