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APPENDIX.
joints yellowish; thorax with a double, brown, middle line, attenuated and abbreviated behind, and a brown approximate line on each side abbreviated before; a small fascicle of hairs beneath each wing, and a dusky spot over the insertion of each foot; wings immaculate; poisers yelr lowish-white; abdomen slender afebase, gradually dilating towards the tip, dull-yellowish, hairy; incisures and tip dusky; feet dull-yellowish, towards their tips dusky.
Length of the body three twentieths of an inch.
I obtained this species on the rocky coast of Lake Superior, in a thicket of small bushes. The nervures of the wings correspond with those of Asindulum punc-tatum, Latr., excepting that the second nervure is not at all connected-with the first nervure, but curves downward at tip and enters the intermediate cellule before the middle, and the ultimate and penultimate abbreviated nervures are distinct; it is a much smaller species than the Jasciata, nob. the nervures of which agree better with the preceding species, but its connecting nervure from the se* cond nervure enters the intermediate cellule at the middle.
3. S. hirticollis. Yellowish-white; thorax hairy; tergum black, with pale yellowish bands.
Inhabits North-west Territory.
Head black; hypostoma, mouth and trophi whitish; antennae black-brown, the four basal joints yellow, with a dark brown spot above on the third and fourth; thorax with rather numerous, somewhat long, black hairs; three dilated, brownish-livid lines, the intermediate one abbreviated and attenuated behind, and the lateral ones attenuated before ; wings a little dusky, the intermediate cellule appearing to the eye like a small, black spot; poisers whitish; pleura with a brownish-livid spot over the intermediate and posterior feet; feet dusky towards the tip, the coxa?