some Oriental Nycteribiidre. 223 



tlic surface. A dorsal view of the (^ abdomen is shown in 

 PI. XI. fig. 10. Its ventral surface (fig. 11) was not described 

 by Speiser ; the basal stcrnite bears two rather irregular 

 rows of short bristles before the hind margin, and the tcetli 

 of the etenidiuin are long and strong ; the two succeeding 

 sternitts bear scattered short bristles on their surfaces and 

 stout moderately long bristles set in a fairly close series on 

 their hind margins ; of these two sternites the third is longer 

 than the second; then follows a very long fourth sternite, as 

 long as the two preceding together, gradually narrowing to 

 its distal end, with its hind margin slightly bisinuate, 

 bearing scattered short bristles on its surface (except just in 

 front of the hind margin, where there is a bare space), 

 and longer bristles set rather far apart on its hind margin, 

 and standing outwards on its sides. The claspers are 

 very remarkable. They arc very long and lie in contact 

 with one another throughout their length. At the base 

 each elasper bears one long and two short bristles, otherwise 

 they are almost entirely bare ; only in the apical half do 

 tiiey bear some exceedingly fine and exceedingly short 

 bristles, and in one specimen where the actual apices are 

 visible these bear each a short stout black spine (PI. XI. 

 fig. 12). 



? Abdomen (PI. XT. figs. 13, 1.5). — The basal tergite is 

 bare on its surface and bears lon^ stout bristles, not set very 

 close, on its hind margin. This is followed by a long 

 whitish connexivum covered with short bristles. At the 

 posterior end of this connexivum and just in front of the 

 anal segment is a single brown area (see fig. 14), with its 

 anterior margin rounded, its surface bare, and its hind 

 margin bearing about 4 or 5 long bristles. Neither in the 

 ? in alcohol from Ceylon nor in the dried Sumatran $ ? 

 from the Genoa Museum can I see any sign of division in 

 this brown plate or area, and therefore do not understand 

 Spelser's reference {I.e.) to " zwei symmetrisch zu beiden 

 Seiten liegende halbmondformige, duukelbraune ('hitin- 

 platten " lying at the posterior extremity of the penultimate 

 segment ; there is no trace of such structures dorsal ly 

 situated in the material before me. The anal segment (PI. XI. 

 fig. 14) has its brown chitinous surface bare; this brown 

 surface is cleft in the mid-dorsal line behind by a triangular 

 space extending about halfway to the base of the segment ; 

 the margins of the brown chitinous portion on either side of 

 this sjjace and at the apical angles bear long stout bristles ; 

 the cleft or space itself is occupied by an area of whitish 



