404 



Dr. T. A. Chapman on the 



even of the third instar are as well-marked as those figured, which 

 give some idea of its asjject in different individuals. 



The last (fifth) stage, differs from the preceding ones by the 

 development of the starlike hair bases. These are colourless and in 

 most lights sparkle like crystals (under a lens, they can hardly 

 be differentiated without) with remarkable effect. One segment 

 enlarged aims at showing their aspect — 



Fig. 1, 2, 3, 4 Third stage enlarged x 5 or 6. 

 5, 6. Fourth stage x 5 or 6. 

 7, 8. Fifth stage x about 4. 



9. One segment, last stage, more enlarged, inverted. 

 Plate XIX. Fio. 10. Egg, A. pheretes x 60. 



Fig. 11. Egg, V. optilete x 60. 

 Plate XX. Fig. 12. Portion of egg of A. pheretes x 150, 



showing sculpture and very small 



micropylar area. 



13. Similar portion of egg of V. optilete 



X 150 (same enlargement) showing 



much larger micropylar area. 



Plate XXI. Fig. 14. Skinof first stage larva ^.^j/ie/eies x 48. 



Plate XXII. Fig. 15. Skin of second stage larva A. phe^-etes 



X 40. 

 Plate XXIII. Fig. 16. Skin of third stage larva A. pheretes 



X 20. 

 Plate XXIV. Fig. 17. Skin of fourth stage larva A. pheretes 



X 16. 

 Plate XXV. Fig. 18. Skin of fifth (last) stage larva ^.^/ie?-efes 



X 13. 

 This photograpli is marred by a few 

 bubbles having got into the pre- 

 paration. 

 Plate XXVI. Fig. 19. Prothoracic plate of second stage larva 



X 100. The filiform hairs are dis- 

 tinct, compared with Fig. 14, though 

 the hairs around are much multiplied, 

 those of the plate are diminished in 

 numbers. 

 20. Honey-gland of second stage larva, the 

 claspers are seen through the trans- 

 parent upper skin, just above them is 

 the seventh abdominal spiracle, the 

 honey-gland is in the line joining 

 these X 100. 



