802 EXPERIMENT STATION RECORX). 



trees with arseuites immediately after the eggs begin to hatch, and 

 cutting out and burning all twigs that have been bored are tbe means 

 suggested for its destruction. At least 2 species of hymenopterous 

 parasites, one of which occurs in considerable abundance, have been 

 bred from this insect. 



The web spinning sawfly of plums and cherries is figured and de- 

 scribed. The insect which was submitted to the Division of Entomology 

 of this Department was named Lyda riifipes, n. sp., and described by 

 C. L. Marlatt as follows: 



"Female.— Length, 11 mm. ; expanse, 18 mm. ; robust, flattened; head very coarsely 

 rugosely punctured ; thorax with more scattered and finer punctures, shiny ; abdomen 

 very finely shagreeued; anterior tibiiP without side spur; cross vein of medium cell 

 very rudimentary, scarcely projecting one-third Avidth of cell; antenna' 21 jointed, 

 third joint three times as long as fourth ; claws rather deeply and finely notched ; color 

 black, shining; mandibles and legs for the most part reddish-yellow; extreme tip 

 of posterior tib;e, and all tarsi, except base of metatarsal joint of fore and middle 

 legs, brownish black; elongate spot on center of clypeus, spot at base of mandible, 

 and at upper inner angle of compound eyes, together with the tegnlse and base of 

 -wings, whitish-yellow; wings nearly hyaline, nerviires, including stigma, dark 

 brown, almost black; a very slight smoky shade obscures outer half of both wings. 



"Male agrees with female in structural and colorational features, but is one-fifth 

 smaller." 



The mature insect usually appears about the second week in June. 

 The eggs are laid in close masses along the mid rib of the younger 

 leaves. Immediately upon hatching the young larvte begin to spin a 

 web and feed, traveling from leaf to leaf, enveloping all in a web. 

 When ready to pupate the larvte descend to the ground, whence they 

 emerge the next year. Spraying with arsenites is recommended as tbe 

 best treatment. 



The wheat stem maggot or American meromyza {Meromyza americana) 

 is figured and briefly described and economic notes are given on its 

 habits and treatment. The figures and descriptions are from Minne- 

 sota Sta. Bui. 43 (E. S. R. 8, p. 146). 



Green fruit worms, M. V. Slingerland {J^ew Yorh Cornell Sta. 

 Bui. 123, pp. 509-522, pis. 4). — This bulletin treats of the noctuids, 

 Xylina antennata, X. laticinerea, and X. grotei. During the year 1896 

 these insects did considerable damage to young fruits, especially apples, 

 in 5 counties in the northwestern section of the State. "It was estimated 

 that at least 25 i^er cent of the apple crop was injured in many local- 

 ities. ... It was found that the caterpillars fed during the day and 

 probably also at night. When young, they doubtless feed upon the 

 foliage or buds, for when the fruit is large enough for them to eat the 

 worms are half grown or more." 



They were found apparently resting during the day on the silken web 

 spun on one side of the partly rolled leaf. The author suspects that 

 this is not a normal habit of the insects, for the only occasion on which 

 it was seen to be resorted to in his cages was in the case of a caterpillar 

 sufleriug from a serious internal trouble caused by a parasitic grub. 



