REVISION OF MOTHS OF PRODOXINAE 49 



is presently kno\^^l about the habits of T. maculata. As was pointed 

 out on page 35, Trelease (1893) observed both subspecies to be active 

 during the day, which, in itself, is most unusual for this group of 

 moths. After the problem has been studied more carefully, however, 

 it may be found that the activity periods of T. m. maculata and ex- 

 tranea actually do differ, perhaps in a manner similar to that noted by 

 Hovanitz (1948) for two color phases of Colias butterflies. The possi- 

 bility that the subspecies of T. maculata may be host specific on two 

 distinct forms of Yucca whipplei strongly suggests that the factors 

 involved in this association are much different from those discovered 

 in other melanic complexes. It seems possible that melanism itself 

 may be of only "neutral" value (e.g., neither decidely advantageous 

 nor disadvantageous) in this particular case, and that it is, instead, 

 closely linked to other more important genetic factors, which are 

 responsible for T. m. extranea's host specificity (and distribution) on 

 the typica group of Y. lohipplei. 



Material examined. — 34 cf cf and 46 99. 



UNITED STATES: California: Los Angeles Co.: Los Angeles, cf, lecto- 

 type, T. extranea, Apr. 4 (INHS). Orange Co.: Mojeska [east of Santa Ana], 

 6 cTcf, 5 9 9, May 23 (LACM). Riverside Co.: near Beaumont, cf, Apr. 23 

 (LACM). Mt. Santa Rosa [near Temecula], 9 , May 30 (LACM). San Bernar- 

 dino Co.: Arrowhead, 9, lectotype, 2 cf cf, 5 9 9, paralectotypes, T. aterrima 

 (USNM). San Bernardino, 2 9 9, Apr. 30-May 12 (LACM). San Diego Co.: 

 FaJIbrook, cf, Apr. 3 (LACM). Pine Valley, east of, 6 c? d', 19 9 9, Apr. 24 

 (USNM). San Pasqual, 14 d^ d^, 12 9 9, Apr. 25 (USNM). 



Mexico: Baja California Norte: Canon las Cruces [near Ensenada], 3 d^ d^, 

 9, Apr. 10 (LACM). 



Tegettcula yuccasella (Riley) 



Figures 19, 24, 26, 30-33, 35, 40, 45, 50, 52, 58, 86-87, 

 106-108, 115, 134, 136, 154; Map 6 



Pronuba yuccasella Riley, 1872a, p. 444; lS72b, p. 182; 1873b, p. 151, figs. 74, 75; 

 1873a, p. 56, figs. 1-2; 1873c, p. 178, fig. 3; 1873d, pp. 619-623.— Packard, 

 1873, pp. 475-476, figs. 128-130.— Riley, 1874a, p. 131, fig. 38; 1874b, 

 p. 208.— Zeller, 1875, p. 340.— Riley 1876b, p. 171; 1876a, p. 325; 1877, 

 p. 568.— Chambers, 1877a [in part], pp. 121, 141; 1877b, p. 148; 1878a, p. 161, 

 1878b, pp. 141-154.— Riley, 1878, p. 377.— Meehan, 1879, p. 33.— Chambers, 

 1880a, p. 198.— Riley, 1880a, pp. 141-143; 1880e, p. 182.— Hagen, 1880, 

 p. 128.— Riley, 1880g, p. 263; 1880f, p. 293; 1881, pp. 617, 637, 639 flf., figs. 

 1-4.— Meehan, 1882, p. 205.— Hagen, 1882, p. 19.— Hulst, 1886, p. 184.— 

 Riley, 1887, p. 233.— Hulst, 1887, p. 236.— Meehan, 1888, p. 274.— Mari- 

 laun, 1888, pp. 153-156, figs. 1-5.— Riley, 1891, p. 97, no. 5179; 1892a, pp. 

 138 flf., pi. 34. figs. 1-4; 1892b, pp. 83 flf., figs. 1, 2, 8; 1892c, pp. 360 flf., figs. 

 58-61, 67; 1892d, pp. 305-307, fig. 13; 1892e, pp. 312, 313, 315.— Smith, 1893, 

 p. 161, fig. 12.— Riley, 1893a, pp. 42 ff.; 1893b, pp. 301-305, 307, 310.— 

 Trelease, 1893, pp. 181-183, 185, 186, 189, 196, 198, 199, 201, 203-205, 207, 

 208, 217, 222, pi. 22, fig. 5.— Whitten, 1894a, p. 137; 1894b, p. 376.— Sharp, 

 1899, p. 432.— Dyar, 1902 [1903], no. 6574; 1903b, p. 102.— Kearfott, 1903, no. 



