CLARENCE E. MICKEL 431 



reticulate beneath the spine; posterior face of propodeum finely rugoso- 

 punctate except the triangular median area whi(!h is rugose within; sides of 

 propodeum finely, transversely striato-punctate; abdomen rather strongly 

 punctate throughout, the longitudinal, median furrow of the first dorsal seg- 

 ment very distinct. Color, black; mandibles except the tips, pronotum entirely 

 above and extending to the posterior lobes, the posterior lobes of the pro- 

 notum, two spots on anterior face of the pronotum, spot at the base of each 

 squama, wide apical band on the first abdominal tcrgite widely interrupted 

 medially, lateral spots on apical margins of tcrgites two to four (the spots 

 narrow and transverse), apical third of the anterior femora outwardlj^ ante- 

 rior tibiae and tarsi, tips of the intermediate femora, line on the intermediate 

 tibiae in front, and base of posterior tarsi, all deep yellow; flagellum beneath 

 and at the tips, testaceous; tegulae and apical abdominal segment red; clypeus 

 and front without conspicuous silvery pubescense, the whole body covered 

 with thin, short silvery pubescence; wings hj'aline, nervures and stigma testa- 

 ceous. 



cf. Unknown. 



Type, a female collected at Omaha, Nebraska, July 9, 1914, 

 on Chamaecrista fasciculata, (L. T. Williams). 



This species may be recognized at once by the deep yellow 

 pronotum and the wide, interrupted, apical A^ellow band on the 

 first abdominal tergite. 



Oxybelus argentarius sp. nov. 



9 . Length 6.5 to 7 mm. Clj'peus shining, impunctate on anterior 

 margin, the lateral angles prominent, and with a very obtuse angulation medi- 

 ally; head closely, moderately punctate throughout, covered with silver}' pubes- 

 cence, which is densest on the clj'peus, front and cheeks; distance between the 

 posterior ocelli a little more than twice the distance between one of them and 

 the nearest eye-margin; first joint of flagellum slightly longer than the second; 

 pronotum distinctly carinate anterior^, the carina forming a small sharp 

 tooth at the sides; mesoscutum and mesoscutellum closely, moderately punc- 

 tate; mesoscutellum and metanotum indistinctly, longitudinally carinate 

 medially; episterna sparsely, moderately punctate; squamae apparently 

 joined at the base (this is caused by the metanotum being yellow), lateral 

 points of the squamae rather long, sUghtly curved inwardly; metanotal spine 

 about as long as the mesoscutellum, narrow, channelled on the basal two-thirds, 

 slightly widened apically, squarely truncate at the tip; upper surface of pro- 

 podeum with a few weak, oblique striae, granulate between the striae; beneath 

 the spine reticulate and granulate; median area of posterior face of propodeum 

 triangular, rather small, glabrous within; sides of propodeum very finely 

 rugoso-punctate; thorax with thin, silvery pubescence, denser and very con- 

 spicuous on the mesoscutum, very dense on the upper surface of the propodeum 

 laterally; abdomen with fairly small, well separated punctures; first four 

 abdominal tergites with a narrow, silvery fascia apicall}'; two apical tergites 

 covered with blackish pubescence; pygidium triangular, shallowlj^ emarginate 



TR.\NS. AM. ENT. SOC, XLII. 

 3 



