I 



264 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



elsewhere on the vesica ; few small spiculati'ons on exterior of aedoeagus 

 near tip. 



Female genitalia: (pi. 33, fig. 6) Sternite VII with long median 

 prong which considerably surpasses the lateral lobes of the sclerite ; this 

 prong rather narrow and because of its length appearing relatively long 

 and narrow in comparison to that of similaris. 



Food plant: Mesquite (Prosopis sp.). 



Distribution: Common in southwestern United States (Arkansas, 

 Colorado, Texas, New Mexico, Utah, Arizona, and California). Only 

 4 Mexican specimens known to the author, though this species must occur 

 generally throughout the dry areas of northern Mexico. 1 9) Copete 

 Mine, 30 miles east of Carbo, Sonora, Mexico (A.M.N.H.) ; 1 cf, 

 Monterrey, Nuevo Leon, Mexico, November 25, 1909. F. C. Bishopp 

 (U.S.N.M.) ; and the 2 female types of albina from Chihuahua, Mexico 

 (Field Museum). 



EXPLANATION OF PLATE 32 

 Male genitalia of the genus Bulla Walker 



(All figures made with aid of camera lucida and at the same magnification 

 except figure 3.) 



Figure 1. Bulia con firmans (Walker). Aedoeagus drawn alongside. 



Figure 2. Bulia deducta (Morrison). Aedoeagus drawn alongside. 



Figure 3. Bulia deducta (Morrison). Enlarged drawing of juxta (anellus). 



Figure 4. Bulia similaris Richards. Aedoeagus drawn alongside. Paratype. 



Figure 5. Bulia similaris californica Richards. Right valve only. 



Figure 6. Bulia similaris californica Richards. Right valve only. 



Figure 7. Bulia mexicana (Behr). Aedoeagus drawn alongside. 



Figure 8. Bulia schausi, new species. Aedoeagus drawn alongside. Holotype. 



Figure 9. Bulia schausi, new species. Right valve only. Paratype. 



Figure 10. Bulia schausi, new species. Aedoeagus with vesica distended. Paratype. 



