100 



THE ENTOMOLOGIST. 



centrally. The middle portion is a spinneret with broad base, 

 the details of structure not easy to see. There are on the head 

 a number of bristles, seventeen or eighteen on each side, and 

 eight or so on the clypeus, besides a number of transparent 

 points that might be called lenticles; all these have their 

 definite positions impossible to describe even with unlimited 

 prolixity. The osmateria are well-developed, two eversible pro- 

 cesses apparently usually directed forwards, about 0*6 mm. long 

 (possibly more if fully stretched). 



The arrangement of the great prominences armed with hairs 

 will be best appreciated by the aid of Mr. Tonge's excellent 

 stereoscopic portrait of the larva. These prominences are a very 

 large pair on the prothorax, which appear to represent the pre- 

 spiracular group of tubercles, but may belong to the prothoracic 

 plate, the spiracles being behind them and the prothoracic plate 

 between. They have about fourteen hairs radiating in all direc- 

 tions on the rounded summit, and eight or ten smaller on the 

 somewhat narrower neck. The hairs are about 0'35 mm. long, 

 broad at the base, and tapering in a regular conical manner to 

 the fairly sharp tip ; they are quite smooth and have a slight 

 curvature ; some of those on posterior segments are a good deal 

 curved. The prothoracic plate carries smaller hairs ; on each 

 side is a hair, rather behind the middle and near the dorsal line, 

 another further out near the anterior margin, and a group of 

 three behind and a little further out than this. At the lower 

 front margin of the great column is a boss with five or six hairs. 

 This may be the prespiracular group; if so, the large wart 

 belongs to the prothoracic plate. The specimens are not very 

 mature, and an appearance of the plate being continuous with 

 the chitinous base of the wart is noticed, but may be deceptive. 



On the second thoracic is a single hair on each side of the 

 middle line, then a large wart, pillar, or horn of brown chitin 

 carrying seven hairs, followed by another almost identical with 

 six hairs ; then a small wart with two hairs, and a separate hair 

 just behind it ; then two more slender hairs close together, 

 those apparently so often present just above the legs. On meta- 

 thorax the dorsal hair is larger than on second thoracic, the first 

 chitinous wart is very large with nine hairs, the next rather 

 smaller with eight, then a low wart with four hairs, and then two 

 at base of legs. The legs carry a number of small hairs on their 

 bases, and several on each joint. The claw is sharply bent, and 

 has a very sharp point. 



On the first abdominal segment the dorsal hair (i. ?) is still 

 single, but the base is prolonged into a conical stem, from the 

 end of which the hair arises. Then follows a large globular 

 wart on a narrower neck, with nine or ten hairs, then a single 

 hair (iii.) above spiracle. On a subspiracular flange two hairs 

 (IV. and v.), the anterior the lower ; on a lower flange four fine 



