250 THE entomologist's record. 



set close together upon a common base. The prothorax has numerous 

 short hairs. The contractions of the dorsal vessel can be easily seen, so 

 transparent is the skin of the larva. When the larva is nearly full-grown 

 in this stage, but not in the earlier half, the place on the metathoracic 

 segment where the blue and white eye-spot will subsequently appear, 

 is seen under the microscope to be marked with a faint, suffused patch 

 of a light bluish tinge. There is no trace of the white pupil yet. The 

 mark is faint and cannot be detected with a hand-lens, but only under 

 the microscope (x40 approximately), and when strongly illuminated. 

 No traces of the subdorsal yellow hne or of the white spots appear in this 

 stage. Caudal horn: Length 3-5mm. Its somewhat swollen base rises 

 from a prominence on the 8th abdominal segiuent. This prominence 

 is washed with light brown. After the basal swelling, the spike tapers 

 very gradually throughout its length. It is black, and thickly covered 

 with short black bristles. It terminates in two small tubercles, each 

 bearing a short colourless hair. It is slightly undulated in places, and 

 is usually carried at an angle of 45°, but, being very mobile, can be 

 raised upright or laid flat. When lying up for the first moult the 

 larva again assumes a yellow colour and semitransparent appearance, 

 the only trace of green being on the thoracic segments. The green 

 colour is evidently due to the chlorophyll in the food. Its length at 

 the end of the first stage is ll-4mm. The first moult was passed on 

 September 19th. 



Second stadium : Head, light yellowish-green, well sprinkled with 

 short hairs. The body of the larva is also yellowish -green. The eye- 

 spot on the metathorax, though small, is now quite distinct to the 

 naked eye ; its white pupil is double, a subseguiental incision separating 

 the two white spots ; the blue ring surrounding the pupils is narrow. 

 Now appears for the first time the broad subdorsal line, yellow in this 

 stage; also the small bluish-white spots faintly ringed with blue, which 

 are arranged in a line below its lower edge, one on each subdivision 

 excepting the first and the last. This arrangement applies to the 

 abdommal segments from the 2nd to 7th inclusive. On the 1st 

 abdominal there are four of the spots, all near the posterior end of the 

 segment, one of them being below the rest. On the 2nd abdominal 

 four or five small white spots run up the first subdivision towards the 

 dorsal centre without reaching it. They start from the yellow subdorsal 

 line. There are also one or two of these spots in and close to the yellow 

 line on the 2nd and 3rd subdivisions. The same thing is repeated on 

 the 3rd, 4th, 5th, and 6th abdominals, but the number of spots gradually 

 lessens until, on the 6th abdominal segment, there is only one left, and 

 that on the 1st subdivision, halfway between the dorsal centre and the 

 lower edge of the subdorsal line. The subdorsal line is fairly sharply 

 defined on its lower edge, but it is suffused above, gradually merging 

 into the greener colour of the dorsum. The dorsal vessel shows 

 through a deeper green. The first trace of the yellow subdorsal line 

 is on the mesothoracic segment, where it is very faint and sufi'used ; 

 it is rather more strongly marked on the metathorax and increases 

 in distinctness up to the 5th abdominal inclusive ; on the 8th 

 abdominal it curves up to the base of the spike, and is very faded. 

 Ventral surface pale green ; true legs and claspers yellowish, their bases 

 green. Caudal horn: Length 5'8mm. Same shape as in first stage. 

 Base enlarged near the insertion, with yellow on the sides. The 



