20 



PROCEEDINGS OF THE NATIONAI^ MUSEUM. 



VOL. 61. 



anterior lobe of the alar area not in blackened spot, while that of 

 P. winnanae is in black spot. 

 Larva. — Stage VI. 



Structure. — Head: Face view, circular in outline; epistoina and 

 labrum with 4 hairs each, epicranium sparsely haired and frons bare 

 or nearly so ; eye disks not elevated and eye lenses slightly convex ; 

 antennae of ihe cone and disk type (fig. 7^), cone as long as diameter 

 at base, membrane with disks rather prominent, disks except outer- 

 most are bands partially or wholly surrounding cone, outermost a 

 small free plate, disks 4 in number and somewhat joint-like; maxilla 

 with palpifer and 4-jointed palpus, lacinia similar to that of 

 P. winnmiae; labium with palpifer and 2- jointed palpus. Thorax: 

 The tergum composed of areas A, B. C. and D; A. excepting in 



tlie prothorax. B and C are 

 sparsely haired; A of the 

 prothorax b a i- e and c o n - 

 stricted, I) bai'c and narrow; 

 mesotlioracic and mcsatho- 

 racic alar area enlarged 

 (causing A and B to termi- 

 nate in alar region with aculo 

 angles), sparsely haired and 

 well separated from preepi- 

 pleurite; alar area absent on 

 prothorax ; p 1 e u r u m ; pre- 

 epipleurite rather small in 

 prothorax, large in the meso- 

 thorax and metathorax; pos- 

 tepipleurite rather large and bare; prehypopleurite large, trian- 

 gular, heavily chitinized and sparsely haired; posthypopleiirite 

 rather large and sparsely haired; legs with 4 joints and an apical 

 claw, joint 3 with small, soft pad on inner side at apex. Abdomen: 

 The tergum of urites 1-9, inclusive, is composed of areas A, B, C, 

 and D (C indistinctly subdivided O'^-^) (fig. >), B and C- are 

 sparsely haired, A is usually bare and D is bare and narrow ; urite 

 10 consists of the epiproct, which is sparsely haired and possesses 

 pseudocerci at laterad caudad extremities ; urites 1-8, inclusive, Avith 

 spiracle in a rather well defined spiracular area; urites 9 and 10 with 

 the spiracle wanting and the spiracular area not demarked; urites 

 1-7, inclusive, with a large, distinct, bilobed and sparsely haired alar 

 area, urites S and 9 with the alar area smaller, sparsely haired, and 

 not distinctly bilobed and urite 10 with the alar area wanting; 

 pleurum ; urites 1-7, inclusive, with preepipleurite distinct and sepa- 

 rate from postepipleurite and both large and sparsely haired, urite 8 



I'TEIiONIDKi M 



Third urite ; 



INDICA.NA KoHWEIt. 

 6, ANTENNA. 



