CLARENCE E. MICKEL 433 



A very distinct and easily recognizable species. The abdomen 

 is not at all marked with yellomsh, and is peculiarly colored in 

 that the median portion of the tergites is black and the sides of all 

 the tergites are ferruginous. 



Oxybelus fastigatus sp. nov. 



d^. Length 6 to 7 mm. Clypeus tridentate; head strongly, closely punc- 

 tate; distance between the two posterior ocelli about two and one-half times 

 the distance between one of them and the nearest eye-margin; first joint of 

 flagellum slightly longer than the second; pronotum carinate anteriorly; meso- 

 scutum and mesoscutellum very strongly, closely punctate; episterna punc- 

 tured likewise; mesoscutellum and metanotum with a distinct, longitudinal 

 carina; lateral points of squamae short, shghtly curved inwardly; metanotal 

 spine a little shorter than the length of the mesoscutellum, about half as wide 

 as long, shallowly channelled, shghtly dilated towards the apex, slightly emar- 

 ginate at the tip; propodeum above obliquely striate, punctate towards the 

 lateral margins; reticulate below the spine; median area of posterior face small, 

 triangular, slightly rugose and shining within; remainder of posterior face 

 closely punctate with a few striae near the margins; sides of propodeum dis- 

 tinctly, transversely striato-punctate; abdomen strongly punctate, apical 

 portions of tergites narrowly, silvery fasciate; tergites four to six with a well 

 developed spine on each side; clypeus and front with rather dense silvery pu- 

 bescence; remainder of body with thin, silvery pubescence. Color, black; a 

 linear, apical spot on each side of abdominal tergites one to four (those on the 

 fourth tergite very narrow and inconspicuous), pale yellowish; flagellum ful- 

 vous, slightly darker above; tegulae, abdominal segments five to seven, an- 

 terior tibiae and tarsi, all ferruginous; squamae pale, translucent; wings hya- 

 line, nervures and stigma testaceous. 



9. Length 7 mm. Differs from the male as follows: metanotal spine 

 about two-thirds the length of the mesoscutellum, apical portion translucent; 

 median area of posterior face of propodeum a little larger and finely, trans- 

 versely rugose; two minute spots on the pronotum, posterior lobes of the pro- 

 notmn, small spot at the tip of the intermediate femora, small spot at the base 

 of the intermediate and hind tibiae, all pale yellowish; the abdominal spots 

 are more extended and almost united into bands; abdominal segments five to 

 six ferruginous. 



Type, a male collected at Harrison, Nebraska, August 4, 1908, 

 (C. H. Gable). Allotype, a female collected at Ogallala, Ne- 

 braska, June 24, 1913, (R. W. Dawson). Four male paratypes 

 taken at Harrison, Nebraska, on August 4, 1908, (C. H. Gable), 

 and August 9, 1908, (R. W. Dawson). Visits flowers of Helian- 

 thus sp. 



This species may be distinguished by the ferruginous apical 

 abdominal segments in both the male and femah;, by the strongly 



TRANS. AM. ENT. SOC, XLII. 



