148 DR. K. W. VERHOEFF ON BRACHYCHAETEUMA, 



Brachychaeteuma bagnalli n. sp. 



Male 7 mm. long, uniformly white with a slight inclination 

 towards yellowish. Body not much narrowed posteriorly. 

 The very short dorsal bristles occur on almost all the 

 segments ; only the three last possess somewhat longer 

 bristles. Prozonites showing close reticulation over a great 

 part of their surface. Reticulation much weaker and less 

 extensive on the metazonites, which are for the most part 

 smooth ; such reticulation as they exhibit is clearest in the 

 neighbourhood of the small prominences (IX. 1, h). The 

 latter, when the segment bearing them is looked at from in 

 front, are seen to be slightly but definitely hooked inwards 

 towards the hinder bristles. When, on the contrary, the 

 segments are looked at from the side, it appears that most of 

 the prominences are decidedly hollowed out in front of the 

 hinder bristles. The bristles themselves spring from little 

 papillae, those of the inner bristles being the most weakly 

 developed, and those of the hinder the most strongly ; the 

 papillae near the lateral prominence form a slight swelling 

 (IX. 1, b). The anterior bristles occur on a line about mid- 

 way between the inner and hind bristles. On the kidney- 

 shaped collum the bristles are also somewhat longer than on 

 most of the other segments, and the lateral prominences are 

 wanting. The second pleurotergite, unlike any of the other 

 abdominal segments, possesses small lateral keels, which end 

 off anteriorly at an obtuse angle from the surface of the 

 tergite, and bear posteriorly on their inner side, on a pro- 

 minence, the hind bristles. The collum and the second 

 pleurotergite are almost completely lacking in reticulation. 



Antennae bearing specially long sensory bristles, one each 

 on the second, fourth and fifth joints, two on the sixth joint; 

 the seventh joint with a sensory bristle which is tubularly 

 expanded at the base and contains exceedingly fine granules. 

 The sixth and seventh pairs of legs in the male are much 

 slenderer than the third, fourth and fifth. This is specially 

 seen in the seventh pair, in which the femur is hooked at an 



