Nov., '03] ENTOMOLOGICAL NEWS. 3OI 



which it forms a cell, where it remains till the latter part of 

 the following March, when it pupates. 



Pupa.— Maoui 11 mm. long, 3 mm, in diameter ; naked, and of a light 

 green color. It is a " pupa libera," and in this form continues till about 

 the first of May. 



Adult {ixom Marlatt, Bull. 48 S. Dak. Expr. Sta., p. 17).— " 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 shagreened ; anterior tibiae without side 

 spur ; cross vein of medium [median ?] cell very rudimentary, scarcely 

 projecting one- third width of cell ; antennae 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 tibiae and all tarsi, except base of metatarsal 

 joint of fore and middle legs, brownish black ; elongate spot on center of 

 clypaeus, spot at base of mandible, and at upper inner angle of compound 

 eyes, together with the tegulae and base of wings, whitish yellow ; wings 

 nearly hyaline, nervures, including stigma, dark brown, nearly black ; 

 a very slight smoky shade obscures outer half of both wings. 



"Male agrees with female in structural and colorational features, but 

 is about one-fifth smaller." 



In forming their webs, the larvae wriggle about half their 

 length from the web already made, and by carrying the thread 

 of silk back and forth, advance the nest to the next leaf. 

 When the larvae are few in number and nearly mature, each 

 seems to have an individual web more closely woven than the 

 main nest, into which it retreats when disturbed. When this 

 occurs, the larvae all stop feeding and emit a brownish fluid 

 from their mouths. 



The total length of the feeding period is from twenty-six to 

 thirty days. 



When the hibernating larvae are about to pupate in March 

 they first work their way up toward the surface, so that the 

 pupae are found just below the roots of the grass. 



This paper is apparently the first record of the presence of 

 this insect in the east, the only reference to it which I can find, 

 except that where it was originally described, being by Dr. 

 James Fletcher (Rept. of Knt. and Bot. Dominion Expr. 

 Farms, for 1896, p. 253), where it is reported from Southern 

 Manitoba, and by the same writer in Trans. Roy. Soc. Can., 

 vol. v, sect, iv, p. 224, 1899. 



