INVESTIGATIONS ON THE MUTILLID WASPS 147 



Utah: Male, top Parowan Mountains, July, 1921 (Knaus) ; male, St. George, 

 Washington County, August ; female, South Creek, Beaver County ; female, 

 Wildcat Valley, Beaver County ; female, Emery County, July 14, 1921 

 (Grace O. Wiley) ; female, Emery County, August 1, 1921 (Grace O. Wiley) ; 

 female, Salt Wash Creek, Emery County, August 8, 1921 (Grace O. Wiley) ; 

 female, Emery County, August 14, 1921 (Grace O. Wiley) ; female, Emery 

 County, August 19, 1921 (Grace O. Wiley) ; female, Emery County, August 

 21, 1921 (Grace O. Wiley) ; male. Vineyard, July 11 (Tom Spalding) ; male, 

 Vineyard, July 14 (Tom Spalding) ; female, Vineyard, September 4 (Tom 

 Spalding) ; female, Vineyard, September 23 (Tom Spalding) ; female. Vine- 

 yard, October 7 (Tom Spalding) ; female, North Fork Provo Canyon, August 

 S (Tom Spalding) ; female. Salt Lake, August 6, 1907 ; female, Ogden, Sep- 

 tember, 1894 (C. C. Adams) ; female, Logan, August 16, 1906; 2 females, 

 Logan; female, Point Mountain, July 20, 1909 (E. G. Titus); female, 

 Olivers, August 15, 1909 (E. G. Titus) ; male. Sand dunes, July 12, 1923 

 (J. A. Harris, Jr.). 



Wyoming: 6 females, Worland, August 1. 1911 (L. Bruner) ; female, Douglas. 



The males vary in length from 8 mm. to 15 mm. In most of them 

 the apical half of the second abdominal tergite has a pair of large, 

 yellow, round spots, but in the specimens from Arizona the spots 

 have coalesced and the second tergite is largely yellow. Usually the 

 pubescence on the anterior portion of the pygidial tergite is black 

 but in some specimens from New Mexico, Arizona, and Texas this 

 pubescence is yellow. The genitalia are like those of le-peletierii and 

 are therefore not figured.^ 



The females have been confused with hioculata Cresson, but differ 

 from that species in the pubescent markings of the abdominal tergites 

 3-5. In hioculata the fourth and fifth tergites are clothed with 

 golden pubescence while in Ursula the black pubescence on the median 

 portions of tergites 3-5 forms a triangle with the apex at the median 

 base of tergite 3 : this area of black pubescence is characteristic of 

 the species. 



In the specimens from Logan, Point Mountain, and Beaver County, 

 Utah, Springfield, Idaho, and Missoula, Mont., the triangular area 

 of black pubescence on abdominal tergites 3-5 is broader and more 

 extended than on the type, and the pubescence of the sternites is 

 mostly black. Four specimens from Emery County, Utah, have 

 the pubescence yellow rather than ferruginous. The specimens from 

 Douglas, Palmerlee, Santa Eita Mountains, Oak Creek Canyon, and 

 Post Creek Canyon, Ariz., have the area of black pubescence reduced 

 to a mere interruption of the pale pubescence medially on tergites 

 3-5, and the apical fringe of the first tergite is white. The length 

 of the females varies from 6 to 15 mm. and the smaller specimens 

 from Delta, Colo., have the antennal scrobes without any evidence 

 of a carina above. 



