NOTES OU TIIK l.ARVA OF SaTURNIA PVIU, 113 



tubercles (one ou either side of the dorsal line) — rei^resenting the 

 combined dorsal and supra-spiracular tubercles of the succeeding 

 segments —being elongated, and not having the special coronal form 

 exhibited by the other tubercles. The prothoracic spiracle, just in 

 front of the segmental incision, is white, oval, with blackish rim. 

 The inesn-tJtora.c has two large turquoise blue, corontil, dorsal tubercles, 

 with a circle of nine black hairs on the circumference of the tubercle, 

 and each tubercle containing two black points, bearing long spatulate 

 hairs ; two supra-spiracular tubercles, with seven black hairs on the 

 circumference, bear one long central spatulate hair ; there are also two 

 similar tubercles just above the line of the sub-spiracular tubercles of 

 the abdominal segments ; two much smaller turquoise blue tubercles 

 below lateral flange and above true legs. The latter dark red-brown 

 in colour, with yellowish bases. The tubercles of the wcta-tluira.v 

 similar to, and agreeing with, those of the meso-thorax. The 

 1st, 2nd and 3rd ahdiniiiaal sci/iiwiits have a similar series of 

 tubercles to those of the meso- and meta-thorax ; but the dorsal 

 with fewer circumferential points, and with only one central 

 hair. The 4th, 5th, 6th, 7th and 8th abdominal segments have 

 similar tubercles, but the sub-spiracular tubercles of the 7th and 

 8th give rise to more than one central hair ; the 9th abdominal 

 segment bears only the two dorsal and two supra-spiracular tubercles 

 of the series. The anal segment is very distinct and separate from 

 the 9th abdominal ; it is very fiat, and bears a dark red-brown 

 saddle-shaped chitinous patch, the rounded edge of the saddle forming 

 the posterior edge of the flap. The bases of the anal j)nilr(/s are also 

 provided with somewhat similar smooth, red-brown patches ; these 

 prolegs are themselves purplish in colour, with a large velvety black 

 base retractile within the green fleshy bases ; the joints are provided 

 with rims of comb-like white hairs. The four pairs of abdominal 

 prolegs are very similar to the anal. (Mr. Bacot observes that the 

 proleg has the J_-shaped foot that is so noticeable in Liparis). A 

 fringe of stout bristles surrounds the vent. A conspicuous pale 

 yellowish-green sub-dorsal flange runs along the first eight abdominal 

 segments, and is broken up into a series of sections somewhat lunular 

 in shape by the segmental incisions — these sections carry the sub- 

 spiracular tubercles. The flange is continued, but less conspicuously, 

 on the three thoracic segments, but its edge is placed just beneath 

 those tubercules, which are almost in line with the sub-spiracular of 

 the abdominal segments. The abdominal spiracles are exceedingly 

 large and conspicuous, and ))laced in the same line (transversely), as 

 the tubercles. They are white, with very deep red borders. The 

 thoracic segments are sub-divided into three suh-sci/mntts, the middle 

 subsegment carrying the whole series of tubercles. The abdominal 

 segments are sub-divided into four more or less distinct sub-segments, 

 the tubercles being on the second sub-segment, so that the row of 

 tubercles appears to be rather nearer to the front than to the back of 

 the segment. The ventral area (below the lateral flange) is of a 

 rather darker green than the lateral areas. The segments gradually 

 increase in size from the head to the meta-thorax, and the increase in 

 diameter is maintained through the 1st, 2nd and 3rd abdominal seg- 

 ments, and with but very slight decrease to the 7th, the 8th being a 

 little narrower. The hair.s of the larva are very beautiful spatulate- 



