48 



C. H. TYLER TOWNSEND. 



Fig. 5. 



extending a short distance forward beneath the integument ; a soft, 

 retractile, primarily 3-branched organ just anterior to these on dor- 

 sum, each branch being subdivided into five smaller branches or 

 ' papillae. Length, 11-13 mm. ; width of head 

 about 1 mm.; of anal portion 1| mm. De- 

 scribed from many specimens. 



Pupa (see fig. 6). — General color pale brown- 

 ish yellow on the 

 thoracic portion, ab- 

 domen darker ; head, 

 wing and leg cases, and filaments pale 

 yellowish, the head sometimes brownish ; 

 prothoracic filaments arising from a single 

 stalk on each side, which branches at 

 base into usually eight filaments ; these 

 do not subdivide. Third and fourth ab- 

 dominal segments with five or six brown 

 hooks or spines on posterior margin of 

 dorsum. Eyes of adult, showing through 

 the pupal skin in some cases, exhibit a 

 remarkable difference in size of facets of 

 upper and lower portion, those of lower 

 half of eye (seen from side) not more 

 than one-fourth as large as those of upper 

 half; division between large and small 

 facets very marked and abrupt, in a line 

 parallel with the longitudinal axis of 

 the head. Length (excluding filaments) 

 4.5-5 mm. 



Cocoon, or case. — Massed in coral-like 

 aggregations. Open at top, but envel- 

 oping all of the pupa, except the filaments or the extreme anterior 

 portion of the hunch-backed thorax. Length 4-5 mm. 



Fig. 6. 



EXPLANATION OF FIGURES. 



Fig. 1. — Head segment of larva, dorsal view (eularged). 

 " 2. — Idem, ventral vievF (enlarged). 

 " 3.— Mandible (greatly enlarged). 

 " 4. — Maxilla (greatly enlarged). 



" 5. — Anal extremity showing breathing organs, dorsal view (enlarged) 

 " 6. — Pupa, lateral view (enlarged). 



