LlFE-HISTORIES. 299 



means certainly so. On the abdominal segments, on the first sub- 

 segment, a little outside the mediodorsal black line is a raised, dark 

 chitinous circle, without any hair, and looking almost exactly like a 

 spiracle. This might be tubercle i. On the yellow lateral fiange, at its 

 most prominent portion, a little in front of the middle of the segment, 

 is another exactly similar chitinous ring, but paler, i.e., brownish in 

 colour. These from their form, colour, and position, may easily be 

 supposed to be the spiracles ; they are, perhaps, tubercle iv. A single 

 similar circle is found on the left side of the second abdominal segment, 

 above and in front of the spiracle. This might be iii. No other exists 

 in this position on any other segment. The tubercles i (if they are i) 

 exist on the 2nd and 3rd thoracic on the 2nd (middle) subsegment. No 

 trace of ii or any other of the structures here noted are found." 

 Mouth-parts. — These are not adequately observed, a hope of rearing 

 the larva being entertained. They are black like the head, except the 

 basal region of antennje and of maxilhie, which are whitish. True 

 Legs. — The legs are black, but the membranes between the several 

 chitinous plates are pale (dirty white). Prolegs. — The ventral 

 prolegs are yellow basally, followed by a short pedicel of dirty yellowish- 

 white ; summit a fairly complete circle. The inner posterior margin 

 furnished with numerous hooks, apparently in two sizes alternating. 

 Round the anterior margin they become much more sparse, so that, 

 from the middle of the anterior to the middle of the outer margin, they 

 can be easily counted as being five. Thence, on outer and back 

 margins, for about \ of circumference, they are quite wanting. Within 

 the hooks the surface is marked by obscure radial lines with centrally 

 a darker point, really, apparently, a hollow, marking the tendinous 

 attachment. The anal claspers form a disc of three-quarters of a 

 circle, the chord of Avhich forms its posterior border ; this border has 

 no hooks. The rest carries hooks, the outer half ten large ones and 

 intermediate smaller ones; on the inner half they are much more 

 crowded and numerous. Supra-axal Comb. — The supra-anal comb 

 is very distinct, of a dark brown (or blackish) colour, with seven teeth 

 on each side, each shorter than the next inside it. Spiracles. — The 

 spiracles are in inconspicuous yellow spots, whose position is already 

 referred to as just below the dark lower band of the subdorsal grey- 

 black area ; each seems to be a little raised, and to have a fine brownish 

 oval chitinous ring. The 1st (prothoracic) and last (8th abdominal) 

 are distinctly larger, and are easily seen as yellow spots. [Described 

 at Locarno, April 22nd, 1903.] 



The larva moulted on May 5th, and entered its last stadium, and 

 was described when about half grown in this stage, on May 1.5th, as 

 follows : — About 16mm. long ; dorsal area black with slaty-grey 

 marblings, which, with the rather long white hairs, give the larva a 

 hoary look. Seen laterally, the yellow lateral line, shading upwards 

 into the lower members of the slaty-grey markings which here, and 

 also at some dorsal pomts, have a yellowish tone, gives a very different 

 general effect. The head is black, rugose from numerous depressions 

 of spherical surface, with the margins rather sharp. It possesses a 

 considerable number of long (2mm.) white hairs, like those clothing 

 the rest of the larva, as well as more numerous and shorter black ones, 

 and still shorter very plumose hairs, chiefly in front. These are of a 

 silvery-grey colour, and give a yellowish tone to this part of the head 



