212 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, I25 



uninterrupted row one-fourth the way from the anterior margin, and 

 with combs over entire surface of segment ; segment 9 with about 30 

 combUke groups of spines arranged along the anterior half of the 

 segment. Ventral surface of abdominal segments : No granulosity ; 

 all spines are anteriorly directed ; segment 4 with a single simple spine 

 on each side of the midline about one-fourth the distance from the 

 anterior margin, the spine of each side separated from that of the 

 other by a median space ; segment 5 with 4 trifid spines in transverse 

 row along the posterior margin, separated by median space ; segments 

 6 and 7 each with a single bifid spine on either side of the midline, 

 separated from each other by a median space, the spines situated three- 

 fourths the distance from the anterior margin. Terminal spines very 

 small, the tips well sclerotized. 



Respiratory apparatus (pi. 37, fig. 301) of each side arising slightly 

 behind the anterior margin of thorax ; composed of 26 filaments which 

 branch as follows : 10-6-6-4 ; filaments are not superficially annulated ; 

 with microscopic spicules over entire surface. Maximum length, 2.6 

 mm., about 0.73 times length of cocoon ; average diameter, 28 ju,. 



Cocoon (pi. 39, fig. 341): Length of base, 3.7 mm.; maximum 

 width, 2.1 mm.; maximum height, 1.2 mm. Cocoon of wall-pocket 

 type, without collar ; base prolonged anteriorly on both sides, but 

 without winglike expansions ; rim around anterior aperture not thick- 

 ened but with anteriorly directed dorsal prolongation, hornlike in ap- 

 pearance, 1.9 mm. long; texture of case spongelike, threads appear 

 loosely arranged. Cocoon covers abdomen only, the dorsal prolonga- 

 tion also covering a central longitudinal section of the thorax; at- 

 tached along three-fourths of its base. 



Larva (pi. 41, fig. 379, and pi. 43, fig. 416).— Total length, 5.5- 

 5,7 mm. Length of head capsule 1.3 times its width. Width of thorax 

 1.4 times that of head. Abdominal segments 1-4 no wider than head; 

 segments 5-7 expanded, greatest at segment 6 which is 1.7 times width 

 of segments 1-4; cross section and profile Hke that of metallicum. 

 General color tan to brown ; dorsum of abdomen with a dark patch on 

 either side of the first 4 abdominal segments and with similar patches 

 on the ventrolateral margins of segments 6 and 7. 



Head: Designs on frons-clypeus and epicranial plates shown on 

 plate 41, figure 379. Each cephalic fan with 56-66 nonpectinate 

 branches. Mandible with 2 well-separated teeth on its inner margin, 

 both sharp-pointed, the distal one longer. Antenna 528 /* long, 4- 

 segmented, light brown, far surpassing basal stalk of cephalic fan ; 

 segment 2 short, about half the length of first or third segment ; seg- 

 ment I with longitudinal striations and segment 2 with transverse 



