REVISION MALACOSOMA HUBNER IN NORTH AMERICA 79 



Great Basin, southern Rocky Mountains, and South- 

 west 9 



8(7). Supraspiracular and subspiracular areas bluish-white; lateral 

 setae white (fig. 355); distribution — southwest end of San 

 Francisco Bay (fig. 3) . . most calif ornicum ambisimile, p. 142 

 Supraspiracular and subspiracular areas black, sometimes 

 streaked with orange; lateral setae orange (fig. 353); 

 distribution — around San Francisco Bay except the south- 

 west end (fig. 3) . . . . most calif ornicum californicum, p. 138 

 9(7). Color pattern largely made up of yellow or orange and black; 

 blue usually reduced to anterior and posterior subdorsal 

 spots on either side of the vertical black bar which is modi- 

 fied so it usually resembles the "torso" mark (figs. 7, 9, and 

 358); this torso mark is quite distinct except in very dark 

 larvae (fig. 359) ; middorsal area outlined with orange so it 

 looks like a black stripe (fig. 358); distribution — west of 

 the Cascades in California, Oregon, and Washington, and 

 northern North America (a few specimens from the northern 

 coast ranges of California may be largely blue and black 

 and without a dorsal stripe, but these should be found as a 

 small percent of similarly colored specimens which have a 

 distinct, broken blue-white middorsal stripe). 



rare individuals oi californicum pluviale, p. 152 

 and rare individuals of other populations of californicum, 



p. 123 

 Color pattern largely made up of blue and black; orange, if 

 present, usually only in the addorsal area; vertical black 

 bar usually absent, but if present the sides are blue ; mid- 

 dorsal area sometimes outlined with orange so it looks like a 

 black stripe (figs. 387, and 390-392); distribution— Great 

 Basin, southern Rocky Mountains, Southwest, and Mexican 

 plateau 10a, 10b, 10c, lOd 



10a(9). Usually with fairly conspicuous orange dorsal markings that 

 often look somewhat like a pair of exclamation marks (!!) 

 (fig. 392); never with a vertical black bar; lateral setae 

 white and conspicuously tufted around setal group L2 (figs. 

 390-392) ; lateral color varying from bluish-green to black 

 and bluish-gray in some specimens (figs. 390-394); occur- 

 ring mainly at lower elevations in central and southern 

 Arizona, primarily along watercourses and irrigated areas, 

 but also extending up canyons. 



most irwurvum incurvum, p. 173 



10b(9). Sometimes with fairly conspicuous orange dorsal markings 

 that may look somewhat like a pair of exclamation marks 



