REVISION MALACOSOMA HUBNER IN NORTH AMERICA 177 



ferences between them and most of the U.S. incurvum incurvum, and 

 because of the nearly complete lack of any specimens from the area 

 between the United States border and Mexico City. When more 

 information is available it will be necessary to revise the subspecific 

 ranges of i. incurvum and i. aztecum. 



COMMENTS. — ^The relationships of what is herem considered M. 

 incurvum incurvum to the populations of what is considered M. cali- 

 fornicum which occur at higher elevations in Arizona are not completely 

 known, but enough collections have been made to indicate that these 

 populations are not completely isolated from each other. See the 

 discussion of these relationships in the introductory section on "The 

 Western Tentbuilders" (page 118). 



Specimens Examined. — 1466 (Museum specimens — 169 males, 85 females, 

 74 larvae; reared specimens — 642 males, 496 females, plus numerous larvae and 

 egg masses). See Appendix I for collections made during this study (page 279). 



United States. — Arizona: Ajo; Baboquivari Mountains (Pima Co.); 

 Goolidge; Fish Creek, Tonto National Forest; Globe; Huachuca Mountains; 

 Madera Canyon, Santa Rita Mountains; Nogales; Oracle; Patagonia; Phoenix; 

 Pima Co.; Ramsay Canyon, Huachuca Mountains; near Roosevelt Dam; 

 Safford; San Carlos; Santa Catalina Mountains; Tempe; Tucson; White 

 Mountains; Yuma; "S. Arizona"; "Arizona." new Mexico: Silver City. 



Doubtful Localities. — California: Palm Springs; Bishop; "Cal." 



Malacosoma incurvum discoloratum (Neumoegen), new status 



Clisiocampa mus var. discolorata Neumoegen, 1893, pp. 4^5. 



Clisiocampafragilis (Stretch), sensu Neumoegen and Dyar, 1894, p. 155 (in part). 



Malacosoma fragilis incurva (Henry Edwards), semu Dyar, 1903, p. 262 (in 



part).— Dyar, 1928, p. 623 (in part). 

 Malacosoma fragilis incurva var. discolorata (Neumoegen), Collier, 1936, p. 115. 

 Malacosoma fragilis mus form discolorata (Neumoegen), McDunnough, 1938, 



p. 138. 



ADULT MALES (males in figs. 300-308).— Color various shades of 

 medium yellowish-brown, lightly dusted with brownish scales. Fore- 

 wings crossed by two fairly evenly curved brownish lines which often 

 have a narrow lighter border that may be more apparent than the lines 

 themselves on some specimens; lines usually without indentations or 

 with only small ones, but occasionally with some that may meet along 

 Cu 2 as in figure 303. Inner line almost invariably evenly curved and 

 without any indentations along veins. Median area usually only 

 slightly darker than inner or outer areas, but sometimes much darker. 

 Hindwings usually darker than forewings, and about same brown color 

 as lines on forewings, and somethnes crossed by a faint lighter band of 



