220 



HYMENOPTERA. 



most of the time in the pupa state, while the fly Yives nine days. 

 The first brood of worms appeared May 21, the second brood 

 June 25. Winchell describes the larva as being pale-green, 

 with the head, tail and feet, black, with luimerous black spots 

 regularly arranged around the body, from which arise two or 

 more hairs. Figure 14G, 1, shows the eggs deposited along the 

 under side of the midribs of the leaf; 2, the holes bored by the 

 very young larvoe, and 3, those eaten b}?^ the larger worms. 



In transporting gooseberry and currant bushes, Walsh recom- 

 mends that the roots be carefull}^ cleansed of dirt, so that the 



cocoons may not be car- 

 ried about from one gar- 

 den to another. The leaves 

 of the bushes should be 

 ,( / ) examined during the last 



i^ / /) week of May, and as only 



7' a few leaves are affected 

 at first, these can be de- 

 tected by the presence of 

 the eggs and the little 

 round holes in them, and 

 should be plucked off and 

 burnt. The female saw- 

 fly is bright honey-yellow, 

 ^'ff- 1*^- Avith the head black, biit 



yellow below the insertion of the antenna?. The male differs 

 in its black thorax, and the antenna? are paler reddish than in 

 the female.* 



The genus Empliytus has nine-jointed antenna? ; the third 



*Mr. Norton lias comniunicnted tho followinjr description of the larva of another 

 Baw-fly of this genus which infests the weeping-willow. 



" Nemctius trilineatiis Norton. Tlic larvaa of this were first seen upon the weep- 

 jng'-willows about August 1st, in immense numbers, almost wholly stripping large 

 trees of their leaves. They begin upon the edge of the leaf and eat all of it except 

 the inner midrib. They arc very sensitive to disturbances, very lively, and are 

 generally found with the hinder part of their bodies bent up over the back. They 

 are twenty-footed, of a bright green color, palest at head and tail, with five rows of 

 black dots down the back, the outer row upon each side irregular and with inter- 

 vals. On each side above the feet is another roM' of larger black dots, and the three 

 anterior pair of feet are black at the base, middle and tip. 



" A great number of the saM'-flies wore found fiying about the trees, August ICth, 

 in the proportion of about ten males to one female. The mules being almost 

 wholly black upon the thorax." 



