188 PROCEEDINGS OF THE NATIONAL MUSEUM vouni 



First maxillae: Telopodites distinctly bipartite, each telopodite 

 with three setae; with an extremely long and conspicuously squamu- 

 late, thin, acuminate lappet. Medial projection subtriangular, with 

 three setae. Coxosternum without medial division, sparsely setose; 

 its lappets extremely long, acuminate, thin, squamulate. 



Second maxillae (see also notes B, I, F, pp. 189, 193, 194): Isthmus 

 very weak, markedly areolate and membranous, the two coxosternites 

 appearing (though not actually) separated. Each coxosternite antero- 

 posteriorl}'" relatively short; each with a small postmaxillary sclerite 

 at the posterior angle. Each statumen strongly sclerotic, dark, 

 arching ectal to and partly around its associated pore, the pore 

 relatively large, opening widely medially. Coxosternital setae as 

 shown. Telopodite fii'st article bicondylic; inner surface of article 

 basally swollen. No article with sclerotic projections or other ap- 

 purtenances. Apical claw very long and thin. 



Tergites, except ultimate pedal: Basal plate not bisulcate; slightly 

 overlapped by posterior edge of cephalic plate. Pedal tergites 

 markedly bisulcate, sparsely setose, the lateral margins of each with 

 one very long seta. 



Sternites, except ultunate pedal: Very sparsely setose, the setae 

 short; faintly areolate; smooth, shining. Sternites of about the 

 anterior third of the body each with a broad, unconsolidated and 

 membranous (and areolate) posterior triangular extension. Each 

 sternite except the first with a deep midlongitudinal sulcus, the sulcus 

 becommg shallower on posterior sternites. Pore fields of 2 kinds: 

 central or subcentral, on sternites 2 through 56; the pore fields on 

 anterior third of body diamond shaped to subtriangular, their apices 

 forward, thereafter becoming progi-essively wider and longer, more 

 elliptical (the axes anteroposterior) and extending toward the rear 

 border of the mesosternite ; anterior paired pore fields on sternites 

 2 through at least 30, apparently absent on rear third of body, the 

 pore fields extremel}^ vague, their pores minute and pale, hence 

 readily overlooked. 



Ultimate pedal segment: Pretergite without lateral sutures, i.e., 

 not demarcated from its pleurites. Tergite with sides weakly con- 

 verging to the broad, truncate posterior margin, exposing dorsolateral 

 parts of each coxopleuron; sparsely setose. Sternite trapezoidal, 

 sides and rear margin straight; much longer than wide. Presternite 

 mediall}^ vaguely suturate; fused on each side without demarcation 

 from pleurites. Coxopleiu-a each with about 20 (left 22, right 19) 

 small pores; moderately swollen, extending forward at least to penul- 

 timate pedal segment, sparsely setose; without special lobes or ridges. 

 Ultimate leg long and thin, with six articles distal to coxopleuron, the 

 tai-sus consisting of two articles, the pretarsus represented by a short. 



