BANKESIA STAINTONI. 209 



sharp claw-like free extremity. The 9th abdominal is only half the 

 width (front to hack) of those in front, and wants, apparently, the 

 anterior trapezoidal plate. The 10th, anal, segment carries a large 

 convex plate, triangular in outline, marked with deep brown spots, 

 carrying at least four hairs on either side, it also carries the anal pro- 

 legs on rather swollen pedicels, which also carry several hairs. There 

 are nine pairs of spiracles, the first is just below the large plate on pro- 

 thorax, the others immediately below the triangular plate, all at about 

 the middle of the segment. The pro thoracic and last two abdominals 

 being much the largest, the tracheas within are easily seen. On the 

 pro- and mesothorax the trapezoidals are fused into one plate, divided 

 by a fine medio-dorsal line, and form a large strong shield covering the 

 whole side and dorsum of the segment ; on the metathorax the trape- 

 zoidals remain separate, but are narrower and less fully developed than 

 those of the pro- and mesothorax. The plate on the prothorax is wider 

 (back to front) and narrower (side to side) than that on the mesothorax. 

 On meso- and metathorax are the usual four hairs, but apparently six, in 

 two rows, on the prothorax. What appears to be the supraspiracular on 

 meso- and metathorax forms a strong plate, but is not evident on pro- 

 thorax. The subspiracular is evident at metathorax, hardly visible on 

 mesothorax. The next (cylindrical) plate is quite distinct on these 

 (meso- and metathoracic) segments and is followed by a very large and 

 strongly developed plate armed with various hairs. This appears to 

 be the posterior ventral plate and forms the base for legs. This plate 

 and the dorsal one are the only two to be easily seen on the prothorax. 

 Between the legs on each segment, each of these plates, one on either 

 side, projects as a rounded eminence, the thick short hairs looking like 

 a palpus, and specially developed on metathorax, where the whole plate is 

 very large, and reminds one of a similar development in Selenia. The 

 legs have 3 joints, the first swollen internally and armed with several 

 long bristles, the 2nd with four bristles (one on outer side) towards its 

 distal extremity, the 3rd with a few short bristles and strong claw. 

 The great strength of these parts, the complete encasement with strong 

 chitinous plates, well supplied ventrally with bristles, the larger size 

 of the mesothorax ventrally than prothorax, still more of metathorax 

 than mesothorax, are the special features of the larva. The head is 

 rather small, rich brown in colour,with four or six long, and various short, 

 hairs on either side, and a pair of 3-jointed antennas armed with three 

 little palpi and a long bristle as long as the antenna which is about 

 one-fourth of the head. There is the usual clypeus rather narrow 

 upwards, with a line outside its margin, a large eye-spot (eye-pigment) 

 in the usual place, the individual ocelli not distinguishable, the jaws 

 strongly serrated, labrum clothed with very short bristles, and labium 

 with spinneret, but the palpi could not be demonstrated in the specimens 

 examined (Chapman) . 



Pupa. — The pupa is somewhat arched, forming a convex curve 

 dorsally ; the terminal segments 8-10 pale yellowish -brown in colour, 

 the remainder of the pupa of a slightly darker brown. Male: The 

 dorsal headpiece semilunar in outline, at broadest part twice the width 

 of prothorax ; the labrum large and square, two hairs on each side close 

 to each other (none above these) ; the maxillae triangular with a very 

 large maxillary palpus at the apex ; the mandibles rounded and pro- 

 jecting ; the labium divided ; the labial palpi project about twice the 



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