76 
Crest broken; mesonotum with three black stripes. 15. discolor Cr. 
Crest slightly or not at all broken; mesonotum pale or with a single 
narrow stripe 16. lineatus Harr. 
Antenne 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. chalceus n. sp. 
Stigma and costa yellow....-.-.-...+.------ 18. coquilletti n. sp. 
Anterior lobes, etc., pale 19. brunneus Nort —>*> 
Antenne moderately robust, strongly tapering; sheath as above, but 
sharply produced at tip; clypeus deeply emarginate. 
20. excavatus n. sp. 
21. californicus n. sp. 
Antenne long and slender, setaceous....-..-..----- 
INDEX TO SPECIES OF AMAURONEMATUS. 
borealis! Manlaths goss sae seen S| CTACHTSMAsp.. Ores cee eee eee 4 
brunneéus Norton, G o...5. 24355 ss-- 19 | lineatus Harrmegton, 9 .-..-...------ 16 
Califormicus mgs ps Oe eee= ee eeeee eee 21 | luteipes Cresson, 9 .-- wp eStee eee e eee 1 
chalceusimesps, QO seecees scence merece 17 luteotergum Norton, Q!/==....------ 14 
COMSTOC danas Perma eee ee eeeeeee 3 | nigrofemoratus Cresson, 9 .---.----- 9 
ConcolomNOTLOnegyesee nee sees 2) POLDlcalis me Spey) ee ase eee eee eee 10 
COONS D sy ioe sae ee cake cee (Ole gonensisme sp. core - eee eee alan 
Coquillettimnsp.) Ce-eee eee eee ease 18 | pectoralis Cresson, 9 -.-.--5--2s2--5 13 
discolor Cresson. 9 eeaseees ace see 15; | rapax (Cresson) ive see = eee eae eee 5) 
OKC sey Meo ease cae seaienooe AO |STULPES'M. SPasG cesses one eee eee 6 
fuliva eS INOTCOM, (Ooo em seers aeciet 12 
1. Amauronematus luteipes Cresson. 
1880. Nematus luteipes Cresson. Trans. Am, Ent. Soc., vill, p. 6. 
Female.—Length 6.5 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; antennal fovea very shallow, almost wanting; antennie 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 eubital cell scarcely longer on 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 verynear apex. Color brownish black; clypeus, labrum, 
bases of mandibles, orbits, particularly posteriorly, angles of pronotum, 
tegule and legs except bases of cox, 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 Pachynematus. In general characters, however, it falls under 
Amauronematus. 
