NO. 1290. LA R VjE of mo THS FR OM COL OR A D 0—D YAR. 38 7 



Stage Z— Head rounded elliptical, higher than wide, black, epistoma 

 white; setse long-, pale, secondary; width about 0.35 mm. Body nor- 

 mal, black, the anterior edge.s of the joints pale; a pale-orange sub- 

 dorsal band on joints 5 to 11, fading out at the ends, sharp above, 

 diffuse below and spreading lateral!}' on the anterior and posterior 

 parts of the segments, most so posteriorly. Subventral fold white. 

 Warts small but elevated, l)lack with small tufts of pale, rather stiff' 

 hairs. 



Stage II not seen. The following stages are from the Colorado 

 larva? : 



Stage ill. — As in the next stage, but the bands more difuse and 

 paler colored; no blue markings. Width of head 0.7 mm. 



Stage IV. — Head round, black, with pale secondary hairs; width 

 1.2 mm. Bod}' normal for Malaco8oma\ a broad, geminate dorsal 

 band, orange red, widened three times on each segment, most so pos- 

 teriorly, extending on ]omts i to 11, faintly also on joint 3, suddenly 

 absent on joint 12; a narrow, waved, cream-colored subdorsal line, 

 absent at the ends; more Oiange markings laterally with traces of blue 

 dottings between these; a blotched pale orange stigmatal band; sub- 

 ventral folds grayish. Ground color black, velvety on joint 12 and in 

 the incisures of joints 2-3 and 3-4. Hairs rather sparse, of various 

 lengths, faintly reddish, alike. 



Stage Y. — W^idth of head 1.8 nun. Much as before, but the lateral 

 stripe is fine and broken and the subventral ones practically obsolete. 

 There is more blue; a dot posteriorly above the subdorsal line, a large 

 patch between that and the lateral line, subventral region blue-gray 

 shaded, joints 12 and 13 blue streaked. Hair reddish dorsally, pale 

 reddish subventrally. Subdorsal line forming a dot on the posterior 

 edges of the segments. Posterior edges of segments yellowish. 



Stage YI. — Head rounded, erect, the clypeus small, the paraclypeal 

 pieces forming a shield-shaped area above the clypeus; velvety black, 

 blue powdered, especially along the sutures; many secondary hairs; 

 width, 3.7 mm. Body cylindrical, normal, joint 13 smaller; flaccid; 

 warts obsolete, the hair subtuf ted dorsally and subventrally anteriorly 

 on the segments, short, rather scant. Velvety black; dorsal line 

 geminate, irregular, mottled, orange, inclosing reddish dorsal hair, 

 widening and divergent posteriorly on the segments, moderately dis- 

 tinct, especially on joint 11, absent on joint 12. Subdorsal line distinct, 

 irregular, broken in the segmental incisures, orange, absent on joints 

 12 and 13; traces of a lateral and a substigmatal line, orange, the 

 lateral fairly distinct and followed below by orange tinted, white, sub- 

 ventral spots; joint 2 nearly all black. Blue transverse dashes in the 

 subdorsal space, a short anterior and long posterior dash in the lateral 

 space, the latter cutting the latei-al line and reaching to the su])ventral 

 space. On joints 3 and 4 this dash is very marked, curved, edging a 



