CELERIO GALLII. 179 



poorly marked on abdominal, segments. Head of medium size, 

 almost square in outline, but with rounded corners ; colour pale 

 delicate green, spotted or speckled with darker ; a few scattered 

 dark tapering hairs with dark bases ; the antennae short and stout, 

 the basal joint particularly so. Body delicate whitish-green, showing 

 white at the junction of segments ; subsegments fairly marked ; 

 scutellum large but not conspicuous, owing to its resemblance in 

 colour to rest of body ; anal plates and plates at base of prolegs 

 much more distinct owing to difference in colour ; the caudal horn 

 short, stumpy-looking, markedly distinct owing to its dusky colour 

 contrasting with the tint of the body, conical, with a flattened top bear- 

 ing two hairs (tubercles i) at summit with hardly a trace of a notch 

 between them (marking it off clearly from such a species as Hyloicus 

 pinastri, with its distinctly forked horn) ; the horn is roughened, not 

 thorny, -but covered with fine pyramidal granulations, and has the 

 appearance of being hard and chitinous, the hairs at summit 

 knobbed ; the setae are very short stumpy black bristles with large 

 black chitinous bases ; on scutellum and anal plates the hairs are 

 slightly longer than on the rest of the body, and tapering, on the 

 dorsal and lateral areas of the body they end in a knob ; a faintly 

 translucent-looking dark mediodorsal line is present ; spiracles 

 small, black-rimmed, those on 7th abdominal larger than those on 

 abdominal segments 1 — 6, although not so large as those on the 

 8th ; the prothoracic spiracle hardly so large as that on the 7th 

 abdominal ; a small white spot beneath the skin on meso- and meta- 

 thorax marks the position of the aborted spiracle. On abdominal seg- 

 ments, tubercle ii is only very slightly exterior to tubercle i, and there 

 are two subsegments between them ; on the meso- and metathorax they 

 are still distinctly trapezoidal in position, but are situated much closer 

 together on adjoining subsegments ; tubercle iii is close above the 

 spiracle on the abdominal segments, but on the meso- and metathorax 

 it is of a double character, and, in some cases, bears two hairs placed 

 very close together ; tubercles iv and v on abdominal segments are both 

 below the spiracle, iv directly beneath on the middle of the central 

 flange, and v very far forward on margin of segment on upper edge of 

 flange ; on the meso- and metathorax only one of these subspiraculars 

 is present (its position suggests that it is v), but there are two 

 similar tubercles (?vi) bearing hairs on ventral margin just above 

 the legs ; on the prothorax the prespiracular is a double tubercle ; 

 the skin-surface is smooth without spicules or secondary hairs ; the 

 1 st subsegment of abdominal segments is very large, probably com- 

 posed of at least three conjoined, the following 5 subsegments are about 

 equal, but less than half the size of the 1st. Second instar (August 2nd, 

 1 90 1) : The usual Sphingid change at 1st moult, viz., multiplication 

 of hairs (now of shagreen character), occurs ; in form the larva tapers 

 from the 8th abdominal forwards towards head ; the head trapezoidal, 

 with rounded edges, slightly notched at crown ; both the shagreen 

 and head hairs are black, short, spike-like, with a small black 

 chitinous base; the skin-surface also thickly dusted with minute, 

 black, ? chitinous specks, fewer in number or absent on the coloured 

 stripes ; caudal horn short and stumpy, of a dark purple colour ; 

 body colours dark dull green dorsally with a paler mediodorsal 

 stripe, subdorsal and infraspiracular bands of whitish or cream colour, 



