some Oriental Nycteribli(la3. 219 



liiiul margin bearing sliglitly longer bristles. Terjites 2, 3, 



and 4 have tlicir hind margins set with moderately long 



bristles, rather far apart (especially on tergite 4) ; tergite 2 



has its entire snrfaee eovered with short fine bristles ; 



tergite 3 has its surlaee similarly covered, excepting the 



extreme basal portion ; tergite 4 has its surface bare except 



for the middle posterior portion, where there are abont two 



irregular rows of short bristles just in front of the hind 



margin. Terrjites 5 and 6 are more arched and produced 



backwards in the middle; their surfaces are bare, their hind 



margins set with long bristles far apart, of which some in 



the middle are very long. Anal seyment short and blunt, its 



apex rather brcjad, its hind angles rounded ; its surface is 



bare in front, but bears a icw erect short ])ristles in its 



posterior part ; there are 6 long bristles on the hind margin, 



3 on either side in the region of the rounded hind angles. 



Ventrally the basul sternite bears two or three irregular 



rows of short bristles on the posterior part of its surface, and 



the teeth of the etcnidium are close and fairly long. Ster- 



n'ttes 2 and 3 are short, their hind margins set with long 



strong bristles rather spaced out (the space between each 



two bristles is about equal in breadth to twice the thickness 



of a bristle at its base) ; these sternites bear on tlie posterior 



parts of their surfaces short fine bristles, which are more 



marked on sternite 2 than on sternite 3. Behind sternite 3 



is a plate { = ster7ntes 4 + 5) longer than the two preceding 



sternites taken together; its margin is nearly truncate in 



the middle behind, and curves ol)liquely forward on either 



side of this truncate portion ; the truncate portion bears 



several rows of very short black thorn-bristles ; on either 



side of these are three very long bristles, and the lateral 



margins also bear some long bristles ; the surface is bare 



except quite near the margins, where there are some rather 



long, fine, erect bristles in fi'ont of the thorn-bristles, and 



shorter erect bristles near the side-margins. The claspers 



lie nearly parallel ; their apices are blunt, curved upwards, 



and dark- pigmented ; each clasper bears a series of bristles 



becoming gradually longer towards its base, the one at the 



base being very long. 



In the $ (Pis. X., XI. figs. G, 7) the true lasal tergite is 

 small, similar to that of the (J . Teryite 2 is of remarkable 

 form : large and transverse, w ith hind margin slightly arcuate, 

 and set fairly closely with moderately long bristles, those in 

 the middle a little longer than those at the sides ; the surface 

 of the tergite has a median longitudinal line of pale con- 

 nexivum, bare of bristles; on either side of tjiis it is more 



