OF WASHINGTON, VOLUME XI, 1909. 169 



spaces (1) forming transverse whitish lines between the blue band 

 and subdorsal band ; a narrow whitish lateral line cut by depressed 

 spaces (4), the lateral space narrow, livid-infiltrated on each side 

 of the white line, the line itself replaced by bright blue on joints 

 6-11; Depressed spaces (5 and 6) level, forming glandular dots at tin- 

 bases of the lateral horns against the yellow band. Later the infil- 

 tration of red in the dorsal space is more distinct and occurs also on 

 joint 10; blue spots laterally on joints 4, 5, 10, and 11 and a white line 

 along the ventral edge. Length, 10 to 14 mm. ; in another specimen, 

 10.5 to 13.5 mm. Duration of the stage, four to five days. 



Stage VII. Subdorsal horns of joints 4 and 5 long, stout, conical; 

 of 3 smaller about two-thirds as long; of 6 small; of 7-9 distinct, 

 longer than wide; of 10 small; of 11 similar to those of 4-5 but not 

 so long; of 12 half as long as that of 11; of 13 slender, longer than 

 that of 11, nearly equal to those on 4-5. Lateral horns of joints 3 

 small, conical; of 4 longer, equal to the subdorsals of 3 ; of 6 small; 

 of 7-9 large; of 10 small; of 11, three-fourths as long as that of 12; 

 of 12 slender, as long as the subdorsal of 13. Horns yellow-cored, 

 black-spined. Elliptical, the sides parallel, three times as long as 

 wide, the middle a little contracted; dorsum arched, sides slightly slop- 

 ing, subventral region moderately retracted. Some caltrope-spines 

 at the bases of the subdorsal horns of joint 13 and the lateral horns 

 of 12. Dorsum infiltrated with red to the lateral horns on joints 3-6 

 and 10-11 in narrow dorsal and lateral spaces, else darkly livid, cut 

 by a blue dorsal line on joints 6-10 and lateral white one on 6 posteriorly 

 to 10 anteriorly; a yellow transverse line on joint 3 to the lateral horn, 

 a bridge between the subdorsals of 4, a spot touching the cores of 

 the horns on 11, a bridge between the subdorsals of 12 and another 

 on 13; the whole of the lateral ridge broadly yellow. Subventral space 

 o>]orK>s. with a white subventral edge line. Diffuse blue lateral patches 

 "ii joints 4, 5, 6, 10, and 11. Skin wrinkly-shagreened. Depressed 

 spaces slight, with glandular centers indicated laterally by colorK-ss 

 dots, not shown dorsally. Length, 14 to 18 mm. : another specimen, 

 13.5 to 19 nun. Duration of the stage, live to seven days. 



Stage Till. Subdorsal horns of joint 3 short; of 4 longer; of 5 

 longest; of 6 and 10 minute; of 7-9 very small; of 11 like that of 4; of 

 12-13 small, about like those of 3. Lateral horns of joint 3 vi-ry 

 small; of 4 like the subdorsals of that joint; of 6-10 a little smaller; 

 of 11 and 12 equal to the subdorsal of 12. Horns greenish yellow, 

 tin- spines yi-ll<i\\ with black tips. A little bunch of caltropes at the 

 liases of the suhdorsal horns of joint 13 and the lateral of 12 above, 

 pale brownish. Dorsum dark purple in dumb-bell shape, the anterior 

 widening the larger; widened at the lateral horns on joints 3-5 and 

 10-13, marked with bright blue in the incisures and in lateral spots 



