RHAGADES GLOBtfLARI^. 411 



division. The prolegs are rather short, and placed well under the 

 body ; the belly is flattened and smooth. In colour the head is black, 

 the antennal papilla? greenish-white tipped with black, the prothoracic 

 segment greenish, with a broad black marking or plate tapering 

 towards the front, the tubercles on the back are of a rather bluish- 

 green tint, the dorsal row of markings black, the white subdorsal marking 

 inclines to creamy-white, sometimes to yellowish-white, this is con- 

 trasted strongly below by a broadish stripe of dark green tapering 

 towards the head and a little also to the hinder part of the body ; on 

 the smooth skin, between the dorsal tubercles at the beginning of 

 each segment and of the white subdorsal marking, are sprinkled 

 some most minute black dots, only a few on the white where it is 

 broadest, but they are numerous on the dark green stripe following 

 it ; the side below is entirely green, including the tubercles, and the 

 whole of them are studded thickly with short and fine blackish 

 bristles ; the spiracles are black, true legs black, the ventral prolegs 

 green." We are indebted to Chapman for a more exact knowledge of the 

 structure of the larva. He describes the newly-hatched larva as being 

 rather square and truncate at either end. It has a blackish-brown 

 head and large prothoracic plate, then a dorsal elevation of each 

 segment, more pronounced on either side, consisting of two dorsal 

 tubercles (i and ii) conjoined in the middle line. It might, indeed, be 

 said that the tubercles are separate in the middle line, but the eleva- 

 tion hardly sinks completely ; each tubercle carries an inner and outer 

 hair, the latter slightly posterior, their length nearly equal to the 

 thickness of the larva ; the inner hair is dark, and has a remark- 

 able jointed bulb at the base; the outer is transparent and simple; 

 each has a series of points along it, circularly or spirally arranged, so 

 that it looks regularly annulated. There is a supraspiracular (iii) 

 tubercle with a long seta of annulated structure ; on the meso- and meta- 

 thorax this is double, and carries two hairs. On the abdominal 

 segments, tubercle iv (the subspiracular) is separated from iii by an 

 interval (in which is the spiracle ?) ; the hair arising from iv is not so 

 long as those arising from i, ii and iii. The inner dorsal spines incline 

 slightly backwards, the outer ones are curved ; the lateral spines are 

 nearly straight and directed outwards. The prolegs carry two fine 

 hairs with battledore tips, projecting downwards, so that they must 

 press on the surface upon which the larva is resting. The true legs 

 carry, in addition to the claw, a similar hair and a battledore-shaped 

 appendage of more ordinary form. The hybernating larva is 3*5 mm. 

 long, 1-4 mm. wide, when at rest ; 5-0 mm. or more long, when 

 active. On each side of every segment are three great bosses of hairs, 

 a dorsal and two lateral, one above the other, the dorsal the largest, 

 but the three together practically covering nearly the whole segment. 

 The bases of the tubercles are composed of a clear pale skin, but the 

 rest of the general surface is studded with black points. The prolegs 

 are of flange form, and have about 13 hooks, the outer ones rather 

 smaller than the others. 



Cocoon. — The cocoon, Buckler says, could be detected by very 

 slight elevations on the surface of the earth, where it had been level 

 before the larvae buried. They were placed just below the surface of 

 the ground, and were of a broad-oval shape, about 9 lines by 7 or 8 



