Sphecoidea of Nebraska 137 
Thorax largely black, marked with more or less yellow ............ 3 
3. Enclosure of propodeum strongly rugose; sternites three, four and five 
with two short rows of erect, curved bristles on the apical middle, 
sonata 
Enclosure of propodeum more or less transversely or obliquely striate 4 
4. Sternites three, four and five with a fringe of long, erect curved bris- 
tles on the apical middle; size large, 15-18 mm. ........... superba 
Either sternite five, or sternites three and four without a fringe of 
MGISCLES 4SIZE. SIMaller) ELTA y MOA ss sass solv! scl aceiae eos: Aieates alre's wi = abeeteheieye 5 
5. Sternites three and four each with a fringe of long, erect bristles on 
the apical middle; sternite five with dentiform processes on the 
apical middle; enclosure of propodeum more or less obliquely 
SBA CUS AES DEC Ree One Cid DEE RACE Ome Laas ere ck eaten me ai elegans 
Sternites three and four without a fringe of long, erect bristles; en- 
closure of propodeum more or less transversely striate ........ 6 
6. Venter of thorax black; hind coxae ferruginous or blackish...rubripes 
Venter of thorax marked with whitish; hind coxae largely whitish, 
fulvipes 
Eucerceris canaliculata (Say). : 
1823. Philanthus canaliculatus Say, West. Quart. Rep., II, p. 8o. 
1823. Cerceris bidentata Say, West. Quart. Rep., Il, p. 8o. 
1882. Eucerceris canaliculatus Cresson, Trans. Amer. Ent. Soc., X, 
Proc., p. vii. 
Males 3, females 2: Lincoln (1), Haigler (1), Mitchell (1) 
and Bad Lands (2); July and August; visits flowers of Meli- 
lotus alba. 
Eucerceris bicolor Cresson. 
1881. Eucerceris bicolor Cresson, Trans. Amer. Ent. Soc., TX, Proc., 
p. XXXvVill. 
1882. Eucerceris bicolor Cresson, Trans. Amer. Ent. Soc., X, Proc., 
p. Vii. 
Females 4: Benkelman (1), Mitchell (1) and Glen (2); July 
and August. 
Eucerceris rubripes Cresson. 
1879. LEucerceris rubripes Cresson, Trans. Amer. Ent. Soc., VII, 
Proc, gS, 
1882. Eucerceris rubripes Cresson, Trans. Amer. Ent. Soc., X, Proc., 
p. vii. 
Males 35, females 7: Lincoln (1), West Point (3), Maskell 
(3), Curtis (6), Gordon (2), Glen (21) and Monroe Canyon 
455 
