800
APPENDIX.
curved point nearly as long as the abdomen, but much shorter, than the hemelytra; sides of the thorax posterior to the horns blackish-brown, with an arcuated spot or line behind the horns, and a band near the tip, whitish; hemelytra and wings blackish-brown; beneath blackish; rostrum, knees, tibia, and tarsi, whitish.
Length three-tenths of an inch.
This is an inhabitant of. Pennsylvania, and also of the North-west Territory. It is closely allied to Centrotus bubalus, Fabr. and is infested by Leptus hispidus, nob.
2. M. trilineata. Brownish-rufous; thorax elevated on the middle, with three longitudinal, one oblique, and one transverse line, whitish.
Inhabits North-west Territory.
Body with rather large dense punctures; head pale greenish-yellow, obsoletely irrorate with brown points j thorax before rounded, unarmed; a dilated pale greenish vitta from the head, is divided by the rounded elevation near the middle of the back, and passes down on each side in an oblique white line, which terminates at the inferior edge behind the middle; a narrow line on each side passes from the head and terminates at the emargination of the origin of the hemelytra; a white band near the tip margined with/foscous; dorsal foliaceous elevation taking its rise behind the line of the origin of the hemelytra, its edge very obtusely curved, and gradually disappearing behind at the white band, its sides in the middle are abruptly compressed; tip acute, not attenuated; hemelytra with a punctured scale at base, which is adjusted in the emargination of the thoracic edge; coriaceous exterior margin less than one-fourth the length of the hemelytra, and punctured; beneath yellowish-green.
Length three-tenths of an inch.