176 U. S. NATIONAL MUSEUM BULLETIN 2 09 



Specimens (28 cf, 459): From California (Calexico and ImperiaJ 

 County); "Dakota"; Kansas (Dickinson County, Douglas County, 

 and Manhattan); Louisiana (Tallulah); Missouri (St. Louis); Texas 

 (Brazoria County, College Station, Dallas, Fort Davis, Lee County, 

 Maxwell, McLennan County, Piano, Rio Grande River in Hidalgo 

 County, Riviera Beach in Kleburg County, Victoria, Waco, and Wil- 

 liamson County). 



The type of Priophanes otiosa is from Santa Cruz, Bolivia, and in 

 the Cambridge Collection are two females from Blairmont, British 

 Guiana, collected in Nov. 1928 by F. X. Williams; these indicate a 

 wide distribution in the Neotropics. Dates of the collections are 

 mostly from the middle of June to the middle of September. Early 

 and late dates are: Apr. 30 in Brazos County, Texas; April and May 

 in Imperial County, Calif.; May 30 in Lee County, Tex.; June 2 at 

 Maxwell, Tex.; Sept. 10 and Oct. 10 in Riley County, Kans.; and 

 Oct. 7 in Williamson County, Tex. There seems to be little difference 

 in the flight period of the sexes. 



This species occm-s in the warmer portions of the Central States, in 

 southern California, and south to British Guiana and Bolivia. It has 

 not yet been taken east of Louisiana or Missouri. Adults occur 

 through the warmer part of the season. 



Subgenus Priophanes Banks 



Priophanes Banks, 1944, Psyche, vol. 50, p. 82. Type: Priocnemis facetus 

 Cresson; original designation. 



Clypeus with its hairless apical margin rather wide, partially or 

 entirely mat, and separated from the rest of the clypeus by a weak 

 groove ; mesopleuron without an oblique carina at the front end of its 

 transverse suture; propodeum posteriori}^ with a few inconspicuous 

 erect hairs; brush on innner side of hind tibia continuous to the apex; 

 hind tibia of female with two external rows of teeth, a dorsal row of 

 chevron-shaped teeth and a subdorsal row of subtuberculate teeth, the 

 tibia not longitudinally concave between the two rows; sixth sternite 

 of male with a median, apical, weakly raised, rounded ridge, the 

 sternite impressed on each side of the ridge ; subgenital plate of male 

 short spatulate, with a median longitudinal raised area which tapers 

 from a base of appreciable width to a narrow apex reaching or sur- 

 passing the midpoint of the plate. 



All tibial spurs of male white, whitish, or stramineous, more or less 

 fuscous at the base. 



This subgenus includes the eight Nearctic species treated below and 

 the Neotropic Priocnemis dowi Banks 1938 {=Priocnemis arioles 

 Banks 1944, new synonymy), Priocnemis parkeri Banks 1925, Prio- 



