220 



HY]VIENOPTERA. 



most of the time in tlie pupa state, while the Qy Ka'cs nine daj-s. 

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

 June 25. Winchell describes the larva as being pale-gi'een, 

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

 regularly arranged around the body, from which arise two or 

 more hairs. Figure 146, 1, shows the eggs deposited along the 

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

 very 3'Oung larvae, and 3, those eaten hj the larger worms. 



In transporting gooseberry and cun-ant bushes, Walsh recom- 

 mends that the roots be carefully cleansed of dirt, so that the 



cocoons maj^ not be car- 

 ried about from one gar- 

 den to another. The leaves 

 of the bushes should be 

 examined during the last 

 /^ week of Maj^, and as onlj^ 

 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-3'ellow, 

 Avith the head black, but 

 yellow below the insertion of the antenna. The male differs 

 in its black thorax, and the antennae are paler reddish than in 

 the female.* 



The genus Empliytus has nine-jointed antennae ; the third 



* Mr. Norton has comniunicated the following description of the larva of another 

 saw-fly of this genus which infests the weeping-Millow. 



" Nematus trilineatus Norton. The larva; of this were first seen upon the weep- 

 ing-willows about August 1st, in immense numbers, almost wliolly stripping large 

 trees of their leaves. Thej^ begin upon the edge of tlie leaf and cat all of it except 

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

 generally found with the hinder part of their l)odies bent up over the back. They 

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

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

 vals. Ou each side above the feet is another row of larger black dots, and ilie three 

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



" A great number of the saw-flies were found flying about the trees, August 19th, 

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

 wholly black upon the thorax." 



