1919.] NATURAL SCIENCES OF PHILADELPHIA. 71 



immature specimens were also present at Rock House Canyon, 

 Arizona, on October 14. Identifiable immature specimens are 

 'before us, taken July 7(Prescott, Arizona) and July 8 to 11 (Sabino 

 Basin, Arizona). 



Specifnens examined: 349; 187 males, 127 females, 13 immature 

 males, 22 immature females. 



Texas: Sanderson, Terrell County, 2750 to 3180 feet; VIII, 

 25, 1912; (R. & H.; scarce in sotol {Dasylirion) and grasses in 

 bed of canyon water course and in similar situations on adjacent 

 steep slopes); 7 cf, 1 9. Marathon, Brewster County, 3940 to 

 4160 feet; VIII, 26 to 27, IX, 12 to 13, 1912; (R. & H.; very com- 

 mon on rocky hillsides, especially toward top, two seen on plain 

 far from hills); 22 cf, 17 9 ; VIII, 20, 1916, (R.; relatively com- 

 mon on hill slopes); 4 cf', 6 9 ; [Hebard Cln.]. Persimmon Gap, 

 Santiago :\Its., Brewster County, IX, 3 and 10, 1912; (R. & H.; 

 near grass tufts on rocky hillside with much lecheguilla. Agave 

 lechuguilla); 11 cf, 2 9. Between Neville Spring and Govern- 

 ment Spring, Chisos Mts. slope, Brewster County, 3600 to 3800 

 feet; IX, o. 1912; (R. & H.; on slope with little grass and much 

 lecheguilla, yucca and creosote bush, Covillea) ; 1 9 . Chisos 

 Mts., Brewster County, VI, 10 to 12, 1908, (Mitchell and Cush- 

 man; at light), 1 cf ; [U. S. N. M.]: VII, 1911, (H. A. Wenzel) ; 

 3 d', 7 9 ; [A. N. S. P.]. Moss Well, Chisos Mts., Brewster County, 

 4500 to 5000 feet; IX, 5 to 8, 1912; (R. & H.; scarce in grasses on 

 hillside, immatures common) ; 2 d^, 1 9,1 juv. cf, 2 juv. 9 . Can- 

 yon behind Pulliam Bluff, Chisos Mts., Brewster County, 4600 

 to 5000 feet; IX, 7, 1912; (R. & H.; in high grass and sotol); 2 cf, 

 3 9 . Lost Mine Peak, Chisos Mts., Brewster County, 5500 to 

 7000 feet; IX, 7, 1912; (R. & H.; in open places of oak scrub on 

 steep slope, few above 6000 feet) ; 7 c^ , 2 9 . Alpine, Brewster 

 County, IX, 8, 1911; (F. C. Bishopp) ; 1 9 ; [U. S. N. M.]. Puer- 

 tacitas Mts., Presidio County, 5100 to 5200 feet; VIII, 31, 1912; 

 (R. & H.); 1 cf. Pine Mountain (slope), Davis Mts., Jeff" Davis 

 County, 5800 to 7000 feet; VIII, 29, 1912; (R. & H.; common 

 in high bunch grass); 22 6^, 4 9,7 juv. 9. Sierra Blanca, El 

 Paso Countv, 4750 feet; IX, 14, 1912; (R. & H.; on slopes of low 

 desert hill); 1 c/". Quitman IMts., El Paso County, 4800 to 5400 

 feet; IX, 14, 1912; (R. & H.; occasional on hillside in grasses); 

 2 d", 1 9. Franklin Mts., El Paso County, 4500 to 5500 feet; 

 IX, 15 to 16, 1912; (R. & H.; on barer slopes with lecheguilla, 

 creosote bush, a few grasses and other desert plants); 10 cf, 4 9 . 



New Mexico: Jemez Hot Springs, Sandoval County; VIII, 

 12 to 20, 1913, IX, 17, 1914; (John Woodgate); 4 9; [Hebard 

 Cln.]. 



Arizona: Prescott, Yavapai County, 5400 to 5600 feet; VIII, 

 14 to 24, 1917; (J. A. Kusche) ; 3 cf", 2 9 : VII, 7 to VIII, 25, 1917; 

 (O. C. Poling) ; 68 d^, 54 9,5 immature d^, 7 immature 9 ; [Hebard 



