220 Mr. H. Scott on 



firmly cliitinized, pale yellowish, and covered with scattered 

 short' bristles ; in shrunk or dried specimens the tergite 

 sometimes collapses along the median longitudinal line in 

 such a way that it appears to be divided into two separate 

 halves, though this is not really the case. The rest of the 

 abdomen (exclusive of the anal segment) consists of whitish 

 connexivum ; the middle part of this bears stout bristles 

 covering a roughly triangular area with its apex directed 

 backwards and reaching to about | the length of the con- 

 nexivum ; the bristles on the front part of this area are 

 rather short, but become gradually longer towards the apex 

 of the area ; the lateral parts of the connexivum bear exceed- 

 ingly short minute bristles ; the extreme posterior part is 

 quite bare except for one pair of bristles in the middle, at the 

 base of the anal segment. Anal segment short and bilobed ; 

 each lobe has 4 very long and stout bristles at its apex, and 

 several very short erect ones on its outer side ; the position 

 of the lobes varies according to the degree of distension of 

 the abdomen ; in the type from Burma they are wide apart 

 (fig. 8), in the Ceylou specimen (fig. 6) they lie close 

 together. Ventrally the basal sternite is as in the (^ . Be- 

 liind it is an area densely set with long and stout dark 

 bristles, the arrangement of which cannot be exactly made 

 out owing to shrinkage oE the membrane. Behind this are 

 two nearly similar short sternites ; each has a median longi- 

 tudinal pale line, on either side of which it is yellowish and 

 more firmly chitinized ; each has a transverse series of erect 

 bristles across its surface ; each has a series of rather long 

 bristles on its hind margin, set wide apart, those on the poste- 

 rior of the two sternites standing in a bisinuate line ; these 

 marginal bristles are all directed backwards except at the hind 

 angles, at each of which are 3 long bristles directed abruptly 

 outwards. The large subgenital plate is longer tlian the two 

 preceding segments taken together, trapezoidal, slightly 

 narrowed behind, with broadly rounded hind angles ; its 

 margin has 3 long bristles at each hind angle ; the surface is 

 quite bare except in the posterior part, where there is a 



group of about 6 erect bristles on eitlier side of the middle 

 line ; the plate has a median longitudinal line, pale and 

 more weakly chitinized than the parts on either side. In 

 spirit-specimens the surface of the plate is quite continuous 



(tig. 7), but in the dried original type this weaker middle 

 line has collapsed into a deep furrow dividing the plate into 

 two halves"^ (fig. 9). 



* To this fact are due Speiser's words (/. r.) " am Iliuterrande mitten 

 scharf eiimezooen uud durch eiue Lanir-«furche in zwei Ilalfteii "ethcilt." 



