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 IL 
quote without alteration Norton’s original descriptions. 
IX. Genus AMAURONEMATUS Konow. 
Amauronematus Konow. Deutsche Entom. Zeits., Xxxiv, 1890, p. 237. 
Body large; clypeus emarginate at apex; claws bifid; antenn 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 tooth 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 Nort. 
Venter of abdomen pale; clypeus distinctly emarginate. 
3. comstocki n. sp. 
Tibie yellowish. 
Clypeus and labrum pale; walls of ocellar basin distinctly defined. 
4. gracilis n. sp. 
Clypeus and labrum black ; walls of ocellar basin somewhat indistinct. 
5. rapax Cr. 
Body black dorsally; wings hyaline. 
Abdomen black ventrally. 
Legs, except apical half of hind tibiw, red..--.....--.- 6. rufipes n. sp. 
Wersiblackvexcept) atmyOMmis assess = see sae ae ea eas 7. cookin. sp. 
Legs with tips of the femora and the tibiw and tarsi pale. 
Pronotum and tegule black; clypeus circularly emarginate. 
8. borealis Marlatt. 
Pronotum and tegulz pale margined; clypeus nearly truncate. 
9. nigrofemoratus Cr. 
Pronotum broadly margined and tegule altogether pale; clypeus 
deeply emarginate, lobes triangular ......----. 10. orbitalis n. sp. 
PAD domennpaleivientra liye, sacs ess passe eee ese 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. luteotergum Nort.—— 
Abdomen yellow; wings clear or nearly so; legs pale. 
Antenne moderately robust, strongly tapering ; sheath elongate, narrow, 
scarcely tapering, tip rounded. 
