262 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I25 



Respiratory apparatus (pi. 38, fig. 312) of either side arising some- 

 what behind the anterior margin of thorax, near the humeral angles ; 

 composed of a dorsal element and a lateroventral element, each horn- 

 like and with pseudoarticulations ; both elements tapering, rather 

 pointed at the apex ; no "tail" present where the two elements diverge ; 

 with transverse wrinkles but without granulosity or minute spicules. 

 Maximum length, 2.3 mm. for dorsal element, 1.6 mm. for ventral 

 element ; maximum width, 0.4 mm. 



Cocoon (pi. 39, fig. 352) : Length of base, 2.4 mm. ; maximum 

 length, 4.5 mm. ; maximum width, 2.1 mm, ; maximum height, 2.1 mm. 

 Cocoon slipper-shaped, with distinct collar and fine parchmentlike 

 texture, threads not visible ; rim around anterior aperture only slightly 

 thickened. Cocoon covers abdomen and thorax; attached along half 

 its base. 



Larva (pi. 41, fig. 390, and pi. 43, fig. 427). — (First description of 

 larva. ) Total length, 7.0 mm. Width of head capsule slightly greater 

 than its length. Width of thorax i .6 times width of head. Abdominal 

 segments 1-3 subequal in width, somewhat narrower than thorax; 

 segment 4 equal to width of thorax ; segments 5-8 expanded, the great- 

 est width being at segments 6 and 7 which are 1.3 times width of 

 segments 1-4 ; cross section and profile as for capricornis. General 

 color gray, without dark patches on ventrolateral regions of segments 

 6 and 7. 



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

 plate 41, figure 390. Each cephalic fan with 34-37 pectinate branches 

 (at times, 40 branches), all the hairs on these branches simple, close 

 together, fairly long, none heavier than the others. Mandible with 2 

 teeth on its inner margin, both appearing to emerge from the same 

 base, the apical one somewhat longer. Antenna 370 /x long, 5-seg- 

 mented, light brown, the first three segments reaching end of basal 

 stalk of cephalic fan ; segment i>2>3<4>2; segment 2 superficially 

 divided into two by median white ring; white rings also present at 

 end of segment 2, and at basal and apical ends of segments 3 and 4 ; 

 segment i with longitudinal striations. Submentum with 9 apical 

 teeth, triangular in shape, the central one much larger than the others ; 

 ventrolateral row composed of 12-16 hairs, arranged in irregular line, 

 the most distal seven bifid, the others simple ; lateral margin of sub- 

 mentum with 5 toothlike indentations. Occipital cleft somewhat 

 rounded, the apex extending anteriorly (pi. 43, fig. 427). 



Thorax and Abdomen : Pseudopod (thoracic proleg) with 36-42 

 rows of hooks at its apex ; postclypeal sclerites long, broad, very well 

 sclerotized, close to each other. Posterior sucker with 160-170 rows 



