4 Clarence E. Mickel 
dish; spot at base of intermediate and posterior tibiae whitish; remainder 
of legs black. 
2. Unknown. 
Type, a male collected at Mitchell, Nebraska, July 17, 1916 
(C. E. Mickel); on Melilotus alba. 
Related to major by the peculiar structure of the mesepisterna, 
but is much smaller than that species and has the last three seg- 
ments of the abdomen ferruginous. 
Oxybelus delicatus sp. nov. 
3. Length 8 mm. Head black, covered with sparse, silvery pubes- 
cence, except the frons where the pubescence is more dense and ap- 
pressed; clypeus five-dentate; frons and vertex finely punctured; occiput 
finely striato-punctate; distance between the posterior ocelli equal to 
twice the distance between the lateral ocelli and the nearest eye margins; 
mandibles reddish except the tips; flagellum largely reddish, blackish ba- 
sally. Thorax black, covered with sparse, silvery pubescence; mesonotum 
and mesepisterna finely punctured; scutellum and metanotum with a 
median longitudinal carina; metanotal spine grooved and truncate at the 
tip; area beneath the metanotal spine reticulate; a wedge-shaped fovea 
on. the posterior face of the propodeum; remainder of posterior face of 
propodeum very finely punctured with scattered transverse rugae; meta- 
pleura rugoso-punctate; tegulae translucent with a basal yellow spot; 
lateral spots on pronotum, posterior lobes of pronotum and small spot 
on squamae, lemon-yellow. Abdomen black, with very fine sparse, sil- 
very pubescence; first abdominal tergite with a median longitudinal sul- 
cus; abdominal segments without any traces of lateral spines; abdomen 
with fine, well-separated punctures; abdominal tergites one, two, three 
and four with wide, lateral, lemon-yellow spots, those on the first seg- 
ment the largest; and these tergites with more or less obscure silvery 
fasciae on the posterior margin; abdominal segments five, six and seven 
ferruginous. Anterior tibiae reddish in front, black behind; anterior tarsi 
reddish; spot at tip of intermediate femora, and base of intermediate and 
posterior tibiae, lemon-yellow; remainder of legs black. 
2. Unknown. 
Type, a male collected at Mitchell, Nebraska, July 17, 1916 
(C. E. Mickel), on Melilotus alba. 
Distinguished by the fine puncturation of the body, the five- 
dentate clypeus, lack of lateral spines on the abdomen, the lemon- 
yellow markings of the abdomen and the three apical segments 
of the abdomen ferruginous. 
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