—s oe 
New Species of Sphecoidea 5 
Oxybelus unicus sp. nov. 
?. Length 9 to 11 mm. Head black, covered with sparse, silvery pu- 
bescence, that on the front appressed; clypeus with a strong median 
tubercle; front, vertex and occiput with strong well-separated punctures; 
distance between the posterior ocelli equal to three times the distance be- 
tween the lateral ocelli and the nearest eye margin; mandibles except the tips, 
yellowish; flagellum reddish beneath, black above. Thorax black, covered 
with very sparse, silvery pubescence; mesonotum and mesepisterna with 
strong, well-separated punctures; posterior fifth of mesonotum, scutellum 
and metanotum with a median, longitudinal carina; squamae having the 
appearance of being united; metanotal spine grooved and acute at the 
apex; posterior face of propodeum with a large, shining, wedge-shaped 
fovea medially; remainder of posterior face of propodeum finely punc- 
tate with transverse scattered rugae; metapleura finely punctate, trans- 
versely rugose near the posterior margin; tegulae reddish, translucent; 
lateral spots on pronotum extending onto the tubercles, lateral spots on 
scutellum and line on metanotum connecting the squamae, all yellowish. 
Abdomen black, covered with sparse, silvery pubescence; abdomen with 
strong, well-separated punctures; first abdominal tergite with a shallow, 
median, longitudinal sulcus; pygidial area triangular, strongly punctured, 
narrowly emarginate at the apex, with golden pubescence; lateral spots 
on tergites one, two, three and four, yellowish, those on the basal tergites 
larger and more widely separated than those on tergites three and four; 
apical segment reddish. Anterior and intermediate femora beneath on 
the apical two thirds, and all the tibiae posteriorly, yellowish; anterior 
tibiae reddish anteriorly; all the tarsi reddish. 
do. Unknown. 
Type, a female collected at Mitchell, Nebraska, July 21, 1916 
(C. E. Mickel). Four female paratypes collected at Mitchell, 
Nebraska, July 20, 21, and 22, 1916 (C. E. Mickel). 
Easily recognized by its large size, the squamae having the 
appearance of being united, markings on the scutellum and yel- 
lowish mandibles. 
Oxybelus mottensis sp. nov. 
9. Length 10mm. Head black, covered with very sparse, short, silvery 
pubescence; clypeus with a strong median tubercle; front finely punc- 
tured; vertex strongly punctured; occiput with coarse punctures, tending 
to be rugoso-punctate; distance between the two posterior ocelli a little 
more than twice the distance between the lateral ocelli and the nearest 
eye margin; flagellum brownish. Thorax black, covered with sparse, sil- 
very pubescence; mesonotum with coarse punctures; mesepisterna longi- 
tudinally rugoso-punctate; scutellum without a median longitudinal carina; 
323 
