78 UNITED STATES NATIONAL MUSEUM BULLETIN 276 



5(4). Subdorsal and supraspiracular areas largely bluish and 

 bluish-white, speckled with black; lateral setae white, or 

 rarely slightly yellowish (figs. 345 and 347) ; distribution — 

 north of a line drawn from Indio, Riverside Co., Calif., 

 along the southern base of the San Bernardino and San 

 Gabriel Mountains (fig. 4) . . constrictum const ictum, p. 93 

 Subdorsal and supraspiracular areas largely black and orange 

 with the blue reduced; lateral setae orange (figs. 346 and 

 348); distribution — south of a line drawn from Indio, 

 Riverside Co., Calif., along the southern base of the San 

 Bernardino and San Gabriel Mountains (fig. 4). 



constrictum austrinum, p. 99 



6(4). Middorsal, addorsal, and subdorsal areas of abdominal 

 segment eight largely black (figs. 342-344), with both 

 primary and secondary setae on segment eight black, and 

 strongly contrasting with the orange secondary setae occur- 

 ring on segments seven and nine; each segment with the 

 subdorsal and supraspiracular areas crossed by a distinct 

 vertical blue line bordered by black (figs. 343 and 344); 

 subdorsal area of mesothoracic and metathoracic segments 

 with a half-moon shaped black mark (most clearly seen in 

 fig. 344); distribution — Colorado, Utah, Arizona, New 

 Mexico, Texas, Mexico, and possibly adjoining areas. 



tigris, p. 102 

 Middorsal, addorsal, and subdorsal areas of abdominal 

 segment eight usually not distinctly blacker than segments 

 seven or nine, but if so, then without the vertical blue line 

 bordered by black on the subdorsal and supraspiracular 

 areas of each segment, and without a half-moon shaped 

 black mark on the subdorsal area of the mesothoracic and 

 metathoracic segments; distribution — much of western 

 North America 7 



7(6). Middorsal, addorsal, and subdorsal areas black (figs. 352 

 and 354), except for small anterior and posterior blue-white 

 subdorsal spots which may be present; occasionally some 

 irregular orange marks may faintly set off a black middorsal 

 area; distribution — west-central California near San Fran- 

 cisco Bay 8 



Middorsal, addorsal, and subdorsal areas not entirely black, 

 either with definite orange markings and subdorsal spots 

 (figs. 358 and 359), or with a blue subdorsal area (fig. 

 382); distribution — north of San Francisco Bay in Cal- 

 ifornia, and many other western states, especially in the 



