166 tJ"i5'- 



photograph of the smallest larva received from Capt. Buxton, and almost 

 certainly in the 2nd instar. The specimen is not spread in any way. 

 The hair-bases are very evident, but the hairs, in the photograph, are 

 verv misleading, a few that contain some air are very conspicuous, whilst 

 the others are hardl}^ visible, and will probably appear to be quite absent 

 in a half-tone plate. The honey-gland is present, but> the indication of 

 the fans is doubtful. 



The marginal hairs are very long and very numerous. In the 3rd 

 instar (Plate VI, fig. 4) the dorsal hairs are highly developed, there are 

 two pairs on each segment, varying in length from O'lS to O'S mm. 

 These hairs are of considerable diameter, the longest rather cylindrical, 

 the shorter somewhat spindle-shaped, as shown in Plate YII, fig. 5. They 

 are abundantly spiculated throughout their length. The prothoracic 

 plate carries a pair, a little longer and more slender than shown in fig. 5, 

 Plate VII, and more closely spiculated. The mesothorax seems to have 

 three pairs. The metathorax has two pairs, the forward pair long 

 (0-3 mm.), the posterior slender and darker. The abdominal segments 

 have two pairs each, but on the fourth a third pair is present and on the 

 5th and 6th, on the 7th the honey-gland and no hairs, the 8th and 9th 

 have several such hairs not definitely in pairs. In addition to these, 

 there are amongst and beside them some very curious hairs, about 

 0'05 mm. long, centrally palmate, with several long spines ; these hairs 

 vary a good deal in size and number of spines, some look as though they 

 were empty gloves with the fingers spread, only the fingers vary in 

 number, are very pointed, and rather irregularly disposed round the palm : 

 the prothoracic plate possesses one of these, but they are more numerous 

 on the abdominal segments. From this dorsal row to the lateral row are 

 no hairs of any size. Hair-bases, mostly without hairs, but here and 

 there with minute ones, are thickly placed ; they have a dentate margin, 

 an odd palmate hair or two, however, occurs. Near the dorsimi and again 

 near the spiiucle are several lenticles, differing little from the hair-bases, 

 except in being rather larger and having the central membranous lumen. 



The lateral hairs are numerous and long, some about 0'4 mm., much 

 more slender than the dorsal ones, and well spiculated, immediately above 

 them is usually a palmate hair or two. 



In the specimen which I take to be in the 4th instar (Plate A^II, 

 fill-. 6) the dorsal hairs are of similar character to those in the third, but 

 are larger and more numerous. The lenticles are larger, about 5 towards 

 the dorsum, 5 or 6 near or above the spiracle. In both the 3rd and 4th 

 instars the caltrop-like hair-bases are ranged across tlie segments in two 



