75 
The last two species, Nos. 49 and 50, I have been unable to recog- 
nize in the material examined. The type specimens are lost, and I 
quote without alteration Norton's original descriptions. 
IX. Genus AMAURONEMATUS Konow. 
Amauronemafus Konow. Deutsche Entom. Zeits., xxxiv, 1890, p. 237. 
Body large; clypeus emarginate at apex; claws bifid; antenna 1 short, subsetaceous, 
usually black; stigma elongate, ovate at base, elongate-acuminate toward apex; 
head, mesonotum, and mesopleura finely and closely punctured and more or less 
opaque; head subtriangular; labium long, protruding; sheath of female thick, 
usually large. 
This genus, characterized as above by Konow, includes a group of 
distinctly differentiated and closely allied species, the American repre- 
sentatives of which may be separated by the aid of the following table: 
TABLE OF SPECIES. 
Inner tooth of claw small and comparatively inconspicuous 1. luteipes Cr. 
Inner tootli or ray of claw large and nearly parallel with outer. 
Body black dorsally ; wings smoky. 
Legs altogether black. 
Venter of abdomen black; clypeus nearly truncate at apex. 
2. concolor Xort. 
Venter of abdomen pale; clypeus distinctly emargiuate. 
3. comstocki n. sp. 
Tibia- yellowish. 
Clypeus and labruni pale; walls of oeellar basin distinctly defined. 
4. gracilis n. sp. 
Clypeus and labrum black; walls of oeellar basin somewhat indistinct. 
5. rapax Cr, 
Body black dorsally; wings hyaline. 
Abdomen black ventrally. 
Legs, except apical half of hind tibiae, red 6. rufipes n. sp. 
Legs black except at joints 7. cooTci n. sp. 
Legs with tips of the femora and the tibiae and tarsi pale. 
Pronotum and teguhe black; clypeus circularly emarginate. 
8. borealis Marlatt. 
Pronotum and teguhe pale margined; clypeus nearly truncate. 
9. nigrofemoratm Cr. 
Pronotum broadly margined and tegnlse altogether pale; clypeus 
deeply emarginate, lobes triangular 10. orbitalis n. sp. 
Abdomen pale ventrally 11. oregonensis n. sp. 
Head and thorax usually more or less marked with black. 
Abdomen black dorsally. 
Stigma broadest at base; lobes of clypeus broad, rounded. 
12. fulvipes Nort. 
Stigma widest at middle; lobes of clypeus small, triangular. 
13. pectoralis Cr. 
Abdomen yellow ; wings smoky; legs black 14. luteotergumfZoTt. 
Abdomen yellow; wings clear or nearly so; legs pale. 
Antenna 1 moderately robust, strongly tapering; sheath elongate, narrow, 
scarcely tapering, tip rounded. 
