14 
Journal New York Entomological Society. [Voi.iv. 
9. Nysson compactus Cress. 
Nysson compactus Cresson, Tr. Am. Ent. Soc. IX, p. 278, $. 
Washington State. 
10. Nysson tristis Cress. 
Nysson tristis Cresson, Tr. Am. Ent. Soc. IX, p. 281, $. 
Washington State. 
11. Nysson lateralis, Pack. 
Nysson later ale Packard, Proc. Ent. Soc. Phila. VI, p. 440, $. 
Nysson lateralis Patton, Can. Ent. XI, p. 213, 9 . 
Canada (Provancher); Maine, New Hampshire, Virginia, Illinois 
(Patton). 
12. Nysson subtilis, sp. nov. 
—Cheeks margined posteriorly beneath, coarsely punctured; front closely 
punctured, appearing strongly granular, feebly ridged above antennae; between 
ocelli flat, not tuberculate; clypeus strongly punctured, transversely depressed before 
apical margin, the latter subtruncate; antennae stout, scape shining, strongly punc- 
ured, flagellum opake, the last joint curved, nearly as long as the three preceding 
united, obliquely truncate at tip, preceding joint slightly produced beneath at apex; 
dorsulum with strong, tolerably well separated, punctures; scutellum rugose, no 
margined laterally ; mesopleurae strongly rugoso-punctate; middle-segment with the 
spines sharp, slenderer than in lateralis , enclosure longitudinally and somewhat ir¬ 
regularly ridged; hind tibiae not spinose; wings subhyaline, nervures dark, petiole of 
second submarginal cell a little shorter than the height of cell, submedian cell of pos¬ 
terior wings terminating a little beyond the origin of the cubital vein ; punctures of 
abdomen subtile, much feebler than in lateralis, stronger on first segment, 
second ventral strongly convex, particularly toward the base, but not truncate anter¬ 
iorly, last dorsal bidentate as in the allied species. Black, the tubercles, and a trans¬ 
verse spot at each side of the first three dorsal segments, yellow ; tarsi and anterior 
tibiae in front, testaceous; clypeus and anterior orbits with silvery pubescence. Length 
6mm. 
Algonquin, Illinois (Nason). Easily distinguished by the entirely 
black front and subtile punctuation of the abdomen. 
13. Nysson rusticus Cress. 
Nysson rusticus Cresson, Tr. Am. Ent. Soc. IX, p. 283, $ 9. 
Washington; Moscow, Idaho (Aldrich); Colorado. 
14. Nysson nigripes Prov. 
Nysson nigripes Provancher, Add. Hym. Quebec, p. 269, g • 
Hull, Canada (Provancher). Unknown to me. Placed near rus¬ 
ticus provisionally, as it may belong elsewhere. 
