232 THE ENTOMOLOGIST. 



above subject, with a note from the Editor requesting further 

 observations, and that I would report thereon ; and, though I 

 have but little to communicate, 1 now send the desired 

 report. 1 stated in my first communication that I had nearly 

 fifty larvae, from eggs produced by one moth ; but when they 

 had grown larger and could be more easily counted, 1 found the 

 number was sixty-three : ten of these I retained for personal 

 observation; I gave nine to one friend, and six to another; 

 the remainder 1 turned adrift when they were nearly full fed. 

 Those in my possession all went to earth on and before the 

 J2th of August, 1871 ; five of them produced moths, the first 

 emerging on the 17th June, 1872, followed by others on the 

 19th, 20ih, 23rd, and 27th; the first and fifth died in a day 

 or two after emergence, without laying eggs, yet, on dissec- 

 tion, I found they contained eggs in an undeveloped state, 

 and that they apparently died from dropsy, their bodies being 

 nearly fiill of water; the others laid eggs respectively on the 

 24th, 27th, and 30th, all the eggs being unfruitful; therefore 

 it would appear that Agamogenesis does not descend beyond 

 the first generation. Some of the molhs reared by my two 

 friends also produced barren eggs. All the moths contained 

 eggs, and it appears to me questionable whether there are 

 any males in moths in which we find Agamogenesis. It will 

 also be seen that but five out of ten caterpillars produced 

 moths this year; but, on turning up the earth in my breed- 

 ing-cage, I found five apparently healthy, active pupae, one 

 of which I dissected, and found it to be full of moisture, and 

 without the least appearance of change. I also found on 

 enquiry that my friends had but seven moths from fifteen 

 caterpillars ; thus from twenty-five pupae there has been but 

 twelve moths, leaving thirteen pupa^ still undeveloped. I 

 have again buried the four pupae, with the hope that next 

 year they may produce moths : should they do so I think it 

 may account for various moths being more abundant some 

 years than they are at others. In an uncongenial season like 

 the present, pupae remain dormant until one more conge- 

 nial, when they emerge with others ; thus increasing the 

 number of moths in that year to more than the usual average. 

 Sphinx Ligustri appear to be more general feeders than was 

 at one time thought: 1 have found them feeding on ash, 

 privet, teasel, laurustinus, and fuchsia; and I see they have 



