the habits of NanO'phyes durieui. 89 



lower part of tlie dorsal area, but is marked off by a 

 longitudinal depression from the portion next above it. 

 This carries at least on the hinder abdominal segment a 

 minute colourless bristle. The sulci above this are rather 

 complicated; tliey mark off an anterior and posterior subseg- 

 ment, of which the anterior is dorsally the higher, each 

 carries a minute bristle, the anterior the larger — one or 

 two more are present on the prothorax. The interseg- 

 mental sulcus branches downwards and there is also a 

 small eminence, at the anterior margin of the segment 

 immediately above the flange. The 10th abdominal 

 segment cannot be seen, but is probably present, retracted. 

 The hairs or bristles made out are very small and very 

 colourless, and cannot be detected without considerable 

 search, so tliat it is possible that others exist ; of these 

 others the only ones supposed to have been observed are 

 abdominal ones continuing the thoracic pedal series. 



The head is comparatively large and well developed, 

 rounded. Looked at from the front there is a median 

 suture, losing itself below, without definitely ending in 

 sutures marking off a clypeus. The head is faintly if at 

 all tinted, but the clypeal region has some faint fuscous 

 clouds. The front ends below in a brown chitinous margin, 

 arched upward centrally over the labrum, and again 

 laterally into rather more than semicircles round the 

 antenna! origins. In the area projecting between the 

 labrum and antenna, a short bristle arises, and another, 

 still in the clyj^eal region, higher up and nearer the middle 

 line. Marginally (as seen from in front) are three bristles 

 on each side at about equal intervals, the lower and smaller 

 behind the antenna, and the highest one about half-way 

 to the vertex. 



The antennre have a very large colourless circular basal 

 region, bounded by the chitinous semicircle already alluded 

 to above, a less marked chitinous margin behind, and the 

 bases of the jaw in front. The antenna itself, arising in 

 the centre of this area, is very minute and slender, and 

 deflexed, and appears to consist of a large basal and a 

 minute terminal joint. The jaws are large and strong, 

 broad at base, about half that width at their cutting 

 margin, which consists of two sharp teeth below (as seen 

 from front), separated from another above by a smooth 

 hollowed margi n . 



The maxilla is full and fleshy, has two fine bristles 



