SPHINX CONVOLVULI. 109 



its ova undeveloped, mere small green gelatinous 

 spots. On September 8th he shut up a damaged 

 female in a large box, and fed her with diluted honey 

 and sugar; on the fourth day she was dead, but she 

 had previously laid eight eggs, and when she was 

 opened there was not a single egg found remaining. 

 On September 10th, a female was shut up in the same 

 way, and she died on the fourth day without laying, 

 and on being opened was found to have a number 

 of eggs with shells, but not matured for extrusion. 

 On September 16th, a female was shut up five days 

 without laying, and then — at the point of expiring — 

 was pinned to a cork, when she laid three eggs, and 

 her body being opened was found to contain 160 fully 

 developed eggs. On September 24th, a female was 

 shut up, which died on the third day, and when she 

 was opened no eggs were found in her. 



Out of the eight eggs laid in the box six shrivelled 

 up, the other two produced larvas in rather less than 

 three weeks after they were laid; these larvse fed on 

 Convolvulus arvensis, one for four days, and the other 

 for ten days, and died without moulting. Previously, 

 in 1859, Mr. Dorville obtained one egg from a cap- 

 tured female, the larva from which hatched on 

 September 27th, but after feeding ten days on Convol- 

 vulus arvensis, died in its first moult. 



Also on October 13th, 1859, Mr. Dorville found a 

 larva about one-third grown on Convolvulus plants in 

 a potato field. 



I have no measurements of the egg, but I noted 

 that it is not more than two-fifths of the size of the 

 egg of 8. ligustri, being decidedly small for so large a 

 moth, and pale green in colour. The young larvae 

 were at first white, with a long black horn. (J. H., 

 3,11,86.) 



