SPRUCE SAW-FLIES. 839 



part of summer, aud feeds separately, uot being gregarious as iu most 

 species of Lophyrus or the Larch Nematus. It is possible that the fly 

 escapes from the cocoon in the autumn, but as a rule it without doubt 

 passes the winter iu the cocoon, the fly making its appearance iu the 

 late spring aud early part of June, specimens having been found dead 

 in the breeding-box in the middle of May. 



Larva. — The body is long, broader than the head ; pale pea-green ; of the color of 

 the leaves of the spruce among which it feeds. The head is smooth, of the same 

 color as the body, with a dark patch extending upward behind each eye. Body not 

 spotted, but with a dorsal dark-green stripe, bordered on each side with whitish 

 glaucous green. Along the body is a lateral conspicuous broad white stripe, the 

 stripe much scalloped below. Body beneath and abdominal legs uniformly green ; 

 thoracic legs pale honey-yellow, except at base. Length, l?™™. 



Cocoon. — Of the usual oval cylindrical form ; of a pale horn color, of the usual 

 density, the walls being opaque. Length, 13™™ ; diameter, 4™™. 



Saw-fly (imago) [two females]. — Antennse nine-jointed ; liagellum minutely hir- 

 sute, seven-jointed, the two basal joints of flagellum equal in length ; head aud body 

 dull amber yellow (testaceous) ; eyes black ; ocelli situated in a dark-brown patch ; 

 a black irregularly triangular spot above the insertion of each antenna, being situ- 

 ated in a pit between the eyes and the inner edge of the broad orbits. A single 

 minute triangular black spot between the antenuiE ; clypeus, labrum, and palpi pale 

 dull amber (testaceous), concolorous with the head ; the mandibles dark at tips. 



Prothorax above not spotted. Mesonotum with three longitudinal, dark, broad 

 stripes ; prtescutum dusky reddish brown, pale on the sides ; on the middle of each 

 half of the scutum a broad blackish band reaching the front edge, but not extending 

 posteriorly behind a point parallel with the apex of the scutellum. Behind and be- 

 tween the ends of these dark bands are two small dark spots. Scutellum on the 

 posterior half dark brown ; the metascntum is black. Sides of the thorax and beneath 

 pale faded amber (testaceous), with a triangular black spot on the sides of the pro- 

 thorax below aud iu front of the wings. 



Abdomen of the same color as the rest of the body, but on the sides and beneath 

 with a greenish tinge ; above black, especially towards the base, next to the thorax ; 

 the segments above being banded transversely with black on segments 1 to 8, the 

 bands growing shorter (transversely) behind, until on the eighth segment the dark 

 band is scarcely wider than long ; the black bands extend on each side of the front 

 edge of each segment, forming a point on each side. Under side of meso- and meta- 

 thorax a little dusky. 



Fore and middle pair of legs testaceous ; extreme tips of tibije and tarsal joints 

 with a very narrow black ring ; last tarsal joint with the pad (pulvillus) and end of 

 claws dark. Hind legs : femora in color testaceous ; tibiae a little dusky, paler 

 towards the femora ; all the tarsal joints equally dusky. Ovipositor at base reddish 

 horn color, tip blackish. Wings with the veins blackish brown ; costal edge paler; 

 stigma dark testaceous ; four subcostal cells, the first or innermost four-sided, sub- 

 quadrate. Length of antenna, .')"™ ; length of body without antennae, 8""" ; length 

 of a fore wing, 8"™. 



This agrees in all respects with Mr. Norton's description of Nematiis 

 integer Say, var. a (Trans. Amer. Ent., 1, p. 216). It is recorded from 

 Maine, Massachusetts, Connecticut, New York, Pennsylvania, and In- 

 diana. It thus seems to be a widely distributed species. It is closely 

 allied to Say's N. vertebratus and to Norton's N. trilineatus, but the pale 

 fore and middle tarsi aud the greenish tint distinguish it. The descrip- 

 tion of the larva is taken from Bulletin 7, U. S. Ent. Comm., p. 234, 

 No. 20. 



