Figures 370-399 



All figures are last instar larvae, % life size. Size variations are due to different 

 degrees of maturity, disease, differing distention after death, etc. Figures 371, 

 393, 394, and 396 are lateral aspect. All others are dorsal aspect. 



370. M. californicum pluviale, near Kalispell, Montana (Coll. 341). Note the 

 white tachinid eggs on the head. 



371. M. californicum pluviale, near Kalispell, Montana (Coll. 341). 



372. M. californicum pluviale, NW. Calgary, Alberta (bog population) (Coll. 

 180). 



373-375. M. californicum lutescens, near Derwent, Alberta (Coll. 179), 

 showing some variations found at a single locality. See figure 376. 

 376. At. californicum lutescens, near Guthrie, Oklahoma (Coll. 421), showing 

 the conspicuous vertical black bars invariably found in southern populations, 

 and the conspicuous addorsal orange areas sometimes found in all populations. 

 377-379. Intermediates between M. californicum lutescens and M. californicum 

 pluviale, near Helena, Montana (Coll. 356), showing extremes of variation. 

 380-382. M. californicum fragile, near Shivwits, Utah (Coll. 234), showing 

 variations that are often found. Also see figures 366-369. 



383-387. M. californicum (central populations), showing variations that may 

 be found throughout much of the Great Basin and Rocky Mountain area. 

 383, 384. Near Austin, Nevada (Coll. 300). 

 385, 386. Near Hot Springs, Utah (Coll. 271). 



387. Near Monticello, Utah (Coll. 287). 



388, 389. M. californicum (aspen populations), near Jacob Lake, Arizona 

 (Coll. 308), showing the two most common color patterns found in the Arizona- 

 Utah area. 



390-394. M. incurrum incurvum, near Phoenix, Arizona (Coll. 200), showing 

 common variations found in Arizona. Larvae i-eady to pupate. Figures 390 

 and 392 are most common near Phoenix. Figure 393, lateral aspect of figure 

 390. Figure 391 is rare near Phoenix, and more common near Tucson. Larvae 

 of M. incurvum aztecum from near Mexico City which have been seen are similar 

 to figure 391. Figure 394, lateral aspect of figure 391. 



395-399. M. incurvum discoloratum, from LUah, showing variations. Larvae 

 in early last instar. 



395. Near Shivwits, Utah (Coll. 233), most common form. 



396. Near Shivwits, Utah (Coll. 233). 



397. Near Shivwits, Utah (Coll. 233), less common form. 



398. San Rafael R.. LTtah (Coll. 282), middorsal stripe is less distinct on the 

 most common form found here. 



399. San Rafael R.. LItah (Coll. 282), rare form with no middorsal stripe. 



251 



279-28,0 — 68 Tip in 



