Dec. 1897.] 
Dyar : New Sawflies, and Larwe. 
191 
nervure; under wing with one middle cell or none. Black, coarsely 
granular and with a fine golden yellow pubescence. Head black, cly- 
peus and labrum bright yellow, two basal joints of antennae orange yel¬ 
low, palpi pale. Thorax black, posterior edges of prothorax, cenchri, 
trochanters, basal two thirds of all tibiae and apex of anterior femora 
yellow; tegulae orange yellow; apex of tibiae and tarsi light brown. Ab¬ 
domen black, basal plates yellow, first segment brown centrally, each 
segment with a narrow posterior yellow line, the terminal segment half 
yellow; venter black. Wings faintly yellowish smoky, veins black, costa 
and stigma brown, the latter yellow at base ; a black dot in the second 
submarginal cell. Length of male 10 mm., female n mm. S. robusta 
Kirby seems to be the same species. Larva characterized Can. Ent., 
XXVII, 339 as “5c.” 
Stage I. —Head .35 mm., brown-black, shiny; skin dark. 
Stage II. —Head .53 mm., black, slightly pruinose. Body dull gray, 
scarcely darker dorsally except from the food showing by transparency; 
thoracic feet black; subventral region white ; no spots. 
Stage IV. —Head .9 mm., dark gray, body pruinose gray, brighter 
subventrally, annulate. No marks. Length 10 mm. 
Stage V. —Head black except around the mouth, covered with white 
bloom ; width 1.3 mm. Dorsal area faintly grayish, lateral black spots 
distinct, two on each segment; a series of small black spots subventrally 
along the bases of the feet, three on each segment. Subventral region 
yellowish, black points present; a white bloom. 
Stage VI. —Head black, pale around the mouth; width 1.6 mm. 
Body as in the mature larva but the gray less evident, marks all smaller 
and fainter. A thick white bloom gradually appears. 
Stage VII. —Head shining black with a faint white bloom; antennae 
short, pointed ; width 2.0 to 2.2 mm. Thoracic feet large, slender, di¬ 
vergent, abdominal ones small, present on joints 6 to 13. Segments 6- 
annulate with minute black points on the second and fourth annulets, a 
few others on the third annulet, stigmatal and subventral folds. Body 
pruinose leaden gray, a thin white bloom on a sordid greenish leaden 
ground; a series of diffuse, quadrate, black patches laterally, two on 
each segment between annulets 1-2 and 4-5. Upper subventral fold 
faintly yellowish, obscured by the bloom ; lower fold black, forming a 
nearly continuous band. Subventral region white; feet and venter 
whitish; thoracic feet largely black. Solitary feeders, do not curl. 
StageVIII. (ultimate)—Head leaden black,but over theclypeus and 
below antennae whitish; width 2.2 mm. Body annulate, shining, leaden 
