10 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.61. 



telescopic type with 5 joints; maxilla with a palpifer and 4-jointed 

 palpus, lacinia broader than M. epinota or trisylldba and flattened 

 with many setae (20) on apical margin; labium with palpiger and 2- 

 jointed palpus. Thorax: With the tergum of the prothorax com- 

 posed of areas A, B, C^"^ and D; B and C- with few indistinct spines; 

 the mesothorax and metathorax A, B^--, C^-^ and D ; B- and C^ with 

 few indistinct spines; alar area absent in the prothorax, large, much 

 divided, but not especially prominent in the mesothorax and meta- 

 thorax; i^leurum; preepipleurite not distinctly separated from alar 

 area, not large; postepipleurite small; prehypopleurite angular, 

 somewhat chitinized and haired; posthypopleurite of medium size, 

 no distinct spines; legs sparsely haired, 4 joints and claw, joint 3 

 with a rather large process at apex on inner side. Abdomen: The 

 tergum of urites 1-8 composed of A, B^-^, C^'^-* and D; B^ and C^ 

 with sparse, indistinct spines ; urite 9 the same but with a subdivision 

 of C wanting ; urite 10 composed of epiproct, moderately spined and 

 without pseudocerci; spiracular area, situated in alar region, well 

 defined, and with a large spiracle on urites 1-8, wanting on urites 9 

 and 10; alar area distinctly bilobed on urites 1-7, indistinctly bilobed. 

 on urite 8, indistinct on urite 9 and wanting on urite 10 ; pleurum ; 

 epipleurite divided into distinct preepipleurite and postepipleurite 

 on urites 1-8; epipleurite undivided on urite 9 and not distinguish- 

 able on urite 10; uropods from distinct liypopleurite on urites 2-8; 

 no uropods or distinct hypopleurite on urites 1 and 9 ; postpedes but 

 no distinct hypopleurite, and postcallus rather large and moderately 

 haired on urite 10. 



Color. — Head: Epicranium brownish black; pleurostoma below 

 eyes, lateral margins of occiput, posterior laterodorsal grooves and 

 margins of frontal epicranial ^iture, whitish; eye disks black; 

 remainder of head whitish. Thorax and abdomen, prothorax, white, 

 except brownish D; mesothorax and metathorax and abdomen, 

 dorsum above alar region brownish ; A and B ^ in middorsal 

 region, alar area under B- in supraalar region and preepipleurite, 

 with blackish spots on mesothorax and metathorax ; B ^■- in mid- 

 dorsal region, B^ in supraalar region, alar area in alar region, pre- 

 epipleurite in epipleural region, with blackish spots on urite 1; 

 urites 2-8 inclusive, same but with an alar spot below spiracle on the 

 spiracular area and postepipleurite with blackish spot; urite 9, B^-^ 

 in middorsal region, B^ in supraalar region and epipleurite with 

 spots ; urite 10 with small supraalar spot at sides. 



Prepujja. — 



Structure. — Head: Similar to larva, but epistoma and labrum 

 thickened and fleshy. Thorax and abdomen, similar to larva but 

 with spines wanting. 



