12 



PROCEEDINGS OF THE NATIONM. MUSEUM. 



maxilla with a palpifer and 4- jointed palpus, lacinia broad and flat- 

 tened with many (16) setae on apical margin (fig. 4^) ; labium with 

 palpiger and 2- jointed palpus. Thorax : The tergum of the pro- 

 thorax composed of areas A, B, C, and D; B and C sparsely but 

 distinctly spined; mesothorax and metathorax, tergal areas A, B, C 

 spined and D bare ; alar area of prothorax wanting but large and 

 somewhat divided in the mesothorax and metathorax; pleurum; 

 preepipleurite large, indistinctly separated from B in the prothorax 

 and the alar area in the mesothorax and metathorax; postepipleurite 

 of moderate size; prehypopleurite triangular, somewhat chitinized 

 and haired; posthypopleurite of medium size; legs with 4 joints and 

 an apical claw, joints sparsely haired, joint 3 with rather long process 



Fig. 4. — 1'seudosiobla floridana Asiimkad. a, Maxilla; 1), third urite. 



at apex of inner side. Abdomen: The tergum of urites 1-8 com- 

 posed of A, B, C^-2-3 and D with B and C^ sparsely but distinctly 

 spined (fig. 4'') ; urite 9 the same but with a subdivision of C want- 

 ing; urite 10 consisting of an epiproct sparsely but distinctly spined 

 and with no pseudocerci ; spiracular area in the alar region fairly 

 distinct and with a rather large spiracle on urites 1-8, wanting on 

 urites 9 and 10 ; alar area distinctly bilobed and each lobe spined on 

 urites 1-8, indistinct on urite 9 and wanting on urite 10 ; pleurum ; 

 epipleurite divided into distinct preepipleurite and postepipleurite 

 with both spined on urites 1-8, epipleurite not distinctly divided on 

 urite 9, and not distinguishable on urite 10; uropods and a distinct 

 hypopleurite present on urites 2-8 ; no uropods and no distinct hypo- 

 pleurite on urites 1 and 9 ; postpedes present but no distinct hypo- 

 pleurite on urite 10. 



