48 Clarence E. Mickel 
of male, two of female, ferruginous; squamae widely separated at 
the “ DASES Lik Hak ART a eats eae lte ade hole voc toheskiepeneue revel oisie eae mS fastigatus 
14. Abdomen* finely “panctined tee hoe etree eye eee eo eee 15 
Abdomen’ quite? coansely =piumctuned: ss. sme see cece seretetee oe eee 16 
15. Abdominal tergites silvery fasciate apically, narrowly margined in- 
wardlys witht shige srithy.O swt sane neteses leicester ieee robertsoni 
Abdominal tergites not silvery fasciate; with pale yellowish lateral 
Spots nather widely vsepatrated mance sseadcee eee ere eet quadrinotatus 
16. Size large, 13 mm.; abdomen of male without lateral spines; episterna 
coarsely, longitudinally striato-punctate below .............. major 
Size smaller, 6-9 mm.; abdomen of male with strongly developed lat- 
eral spines; episterna coarsely punctate throughout ...... subulatus 
Oxybelus robertsoni Baker. 
1896. Oxybelus robertsoni Baker, Ent. News, VII, p. 156. 
1908. Oxybelus robertsoni H. S. Smith, Univ. Nesr. Stupres, VIII, 
p. 409. 
Males 1: Warbonnet Canyon, July 20, 1901; visits flowers of 
Eriogonum sp. 
Oxybelus apicatus H. S. Smith. 
1908. Oxybelus apicatus H. S. Smith, Univ. Nesr. Stupies, VIII, 
p. 409. | 
Males 1: Warbonnet Canyon, July 20, 1901 (M. Cary) ; visits 
flowers of Eriogonum sp. 
Oxybelus glenensis H. S. Smith. 
1908. Oxybelus glenensis H. S. Smith, Univ. Nepr. Stupies, VIII, 
p. 410. 
Females 1: Glen, August 18, 1906 (P. R. Jones). 
Oxybelus argentarius Mickel. 
1916. Oxybelus argentarius Mickel, Trans. Amer. Ent. Soc., XT 
Dp. 431. 
Females 2: Harrison, August 9, 1908 (C. H. Gable), and Glen, 
August 13, 1906 (M. H. Swenk) ; visits flowers of Cleome ser- 
rulata. 
Oxybelus umbrosus Mickel. 
1916. Oxybelus umbrosus Mickel, Trans. Amer. Ent. Soc., XLII, 
Pp. 432. 
366 
