CLARENCE E. MICKEL 423 



scutum sculptured like the head; mesoscutellum with sparse, shallow punc- 

 tures, slightly longitudinally striate on the posterior margin; episterna with 

 sparse, shallow punctures; finely, transversely striate above; propodeum 

 above finely, longitudinally striate, on the lateral and posterior sides finely 

 rugose; abdomen microscopically punctate except the first segment which is 

 rather glabrous and almost impunctate; pygidium broad, flat, not excavated, 

 very strongly punctured. Black; scape at the tip, four small spots on the 

 pronotum (sometimes only two are present), posterior lobes of pronotum, 

 metanotum, two small, lateral, sinuate spots on first tergite, large, wedge- 

 shaped, lateral spots on tergites two and three, large, sinuate lateral spots on 

 tergite four, band on tergite five which is very slightly interrupted medially, 

 fore and intermediate tibiae except a line within, posterior tibiae except at 

 the apex, and the first joint of all the tarsi, light yellow; stigma and nervures 

 of the wings, yellowish. Clypeus, inner orbits and tergites of the abdomen 

 with silvery pubescence; head and thorax with very long, thin, pale hairs. 



cf. Length 6 to 8 mm. Head finely granulate with sparse, shallow 

 punctures; distance between the two posterior ocelli about equal to the distance 

 between one of them and the nearest eye margin; flagellum about three times 

 the length of the scape; first joint of flagellum about equal in length to the 

 two following joints united; apical joint of flagellum distinctly curved and 

 much flattened; pronotum not furrowed laterally, slightly depressed medially, 

 the lateral teeth small and blunt; mesoscutum sculptured like the head; meso- 

 scutellum with a few, sparse punctures; episterna sparsely punctured, finely, 

 transversely striate above, propodeum longitudinally rugose above, channelled 

 medially; sides of propodeum transversely striated; the posterior face trans- 

 versely rugose; tergites of abdomen microscopically punctate; anterior tro- 

 chanters about half as long as the femora, much broadened before the apex; 

 anterior femora much flattened with a long, slender, sharp spine at the base; 

 tibial shield broader than long; first joint of anterior tarsi much flattened. 

 Black; apical three-fifths of scape, two elongate spots on the pronotum, pos- 

 terior lobes of pronotum, broad band on the mesoscutellum narrowly inter- 

 rupted medially, metanotum, lateral spots on tergites one to three (those on 

 the first tergite almost touching), broad bands on tergites four, five and six, 

 tergite seven almost entirely, fore and intermediate femora at the apex, all 

 the tibiae except the apex of the intermediate and posterior, and first joint 

 of all the tarsi, fight yellow; basal half of tibial shield light yellow, apical half 

 creamy, translucent. Clypeus, inner orbits and tergites of abdomen with 

 silvery pubescence; head and thorax with very long, thin, pale hairs. Stigma 

 and nervures of wings yellowish. 



Type, a male collected in Sioux County, Nebraska, in May, 

 (L. Bruner) ; allotype, a female collected in Sioux County, Ne- 

 braska, in May, (L. Bruner); three female paratypes and four 

 male paratypes collected in Sioux County, Nebraska, in May, 

 (L. Bruner) ; one female paratype collected at Warbonnet Canyon, 

 Sioux County, Nebraska, May 26, 1901, (]\I. Cary); one female 



TRANS. AM. ENT. SOC, XLH. 



