46 Harry Scott Smith 
Occurs only in the northwestern portion of the state, both sexes 
having been taken at Glen, at flowers of Petalostemon and Heli- 
anthus spp. (P. R. Jones, H. S. Smith). One male I place here 
doubtfully, it having no black whatever on the legs and differing 
from the other males also in having the basal abdominal segment 
reddish ; in these characters it is like the female specimens. 
Cerceris occipitomaculata Packard. 
1866. Cerceris occipitomaculata Packard, Proceedings of the Ento- 
mological Society of Philadelphia, vi, p. 62. 
Found throughout the entire state during August and Septem- 
ber. The narrow abdominal bands resemble those of the follow- 
ing species, but it is easily separated from that one as indicated 
in the synopsis. One specimen is labeled C. pedalis Cresson, 
NESS: 
Cerceris clypeata Dahlbom. 
1845. Cerceris clypeata Dahlbom, Hymenoptera Europaea, i, pp. 221 
and 500. ‘ 
1865. Cerceris clypeata Cresson, Proceedings of the Entomologicai So- 
ciety of Philadelphia, v, p. 114. 
Twelve specimens, both sexes, from Glen, Neligh, West Point, 
Brady Island and Lincoln, June to August, at flowers of Solidago 
sp. 
Cerceris compar Cresson 
1865. Cerceris compar Cresson, Proceedings of the Entomological So- 
ciety of Philadelphia, v, p. 126. 
Numerous specimens from Sioux county, West Point, and 
Omaha, during the month of June. Some of the males present 
a peculiarity in having the under portion of the mesothoracic 
epimeron armed with a strong spine, just before the intermediate 
coxae. This spine is tipped with yellow. 
Cerceris nebrascensis, n. sp. 
?. Length 10-12 mm. Insect rather slender, ground color black. 
Cheeks, occiput, and vertex with medium-sized close punctures, sometimes 
almost arranged in striae; face and clypeus with punctures more sparse 
and shallow; intra-antennal carina quite elevated; median lobe of clypeus 
strongly produced and raised anteriorly, quadrate excepting that the an- 
terior margin is somewhat concave, about as broad as length of first two 
joints of flagellum, anterior margin of clypeus with four indistinct blunt 
368 
