76 
Crest broken; mesonotum with three black stripes. 15. discolor Cr. 
Crest slightly or not at all broken ; mesonotum pule or with a single 
narrow stripe 16. Jincaitis Harr. 
Antenna* moderately robust, strongly tapering ; sheath strongly tapering 
toward tip, latter obtusely pointed. 
Anterior lobes, mesonotum, and tip of scutel black. 
Stigma and costa dark brown 17. ehalceus n. sp. 
Stigma and costa yellow 18. coquilletti n. sp. 
Anterior lobes, etc., pale 19. brunnew Nort 
* Antennae moderately robust, strongly tapering; sheath as above, but 
sharply produced at tip ; clypeus deeply emarginate. 
20. excavatus n. sp. 
Antennae long and slender, setaceous 21. califonticus n. ep. 
INDEX TO SPECIES OF AMAUKONEMATUS. 
borealis Marlatt, $ 8 I gracilis n. sp., 9 4 
brunn ens Norton, 9 19 lineatus Harrington, 9 16 
on li torn ic us n. sp., $ 21 luteipes Cresson, 9 1 
ehalceus n. sp., 9 17 
comstoeki n. sp., 9 3 
concolor Norton, J 2 
cookin. sp., $ 7 
coquilletti n. sp., 9 18 
discolor Cresson, 9 15 
excavatus n. sp., 9 20 
fulvipes Norton, 9 12 
Inteotergum Norton, 9 14 
nigrofemoratns Cresson, 9 9 
orbitalis n. sp., 9 10 
oregOD.enslsn.8p., 9 H 
pectoralis Cresson, 9 13 
rn pa x Cresson, $ 5 
rnfipesn. sp., $ 6 
1. Amauronematus luteipes Cresson. 
1880. Nematua luteipes Cresson. Trans, Am. Ent. Soc, viii, p. 6. 
Female. — Length G.5 mm.; exp. al. 14 mm.; very robust, shining; 
finely pubescent; clypeus deeply and circularly emarginate, lobes nar- 
row, rounded; frontal crest and sides of ocellar basin indistinct or 
wanting; antenna] fovea very shallow, almost wanting; antenna' short, 
not much longer than head and thorax, rather slender, scarcely taper- 
ing, joints 3, 4, and 5 subequal; intercostal vein nearly interstitial with 
basal; third cubital cell scarcely longeron upper margin than wide at 
base; discal cells of hind wings with outer veins interstitial or nearly 
so ; sheath narrow, obliquely truncate at apex; inner ray of claw minute, 
tooth like, and very near apex. Color brownish black; clypeus, labrum, 
bases of mandibles, orbits, particularly posteriorly, angles of pronotum, 
tegulae and legs except bases of coxre, more or less of apical margin 
of segments of abdomen, particularly ventrally, yellowish fulvous; 
sheath and cerci fulvous; veins, including stigma and costa, brown; 
wings slightly infuscated. 
One female. Nevada. (Coll. Am. Ent. Soc.) 
In the structure of the claw, this species diverges somewhat from the 
genus to which it is now assigned and approaches the structure occur- 
ring in Fachynematus. In general characters, however, it falls under 
Amauronematus. 
