202 Dr. F. A. Dixey on 



ation) do not tend to cause a reversion to the dry-season 

 form. The first lot of T. annfe I bred (under ordinary 

 conditions) were in pupa during fine warm weather, and 

 took nine days to emerge. Those placed in the damp tin 

 took in both cases twelve days. Three other pupse kept 

 under ordhiary conditions were also twelve days in pupa, 

 the last six days being cold, wet weather ; these however 

 were all of the full wet form, one female being even blacker 

 than usual. With this species I observed that the bred 

 specimens were nearly always more advanced in coloration 

 than freshly emerged captured specimens." — G. A. K. M. 



Eight of the specimens of T. annss, Wallgrn. above 

 referred to, are now in the Hope collection. One of these 

 emerged on Nov. 17, 1896, after a pupal stage of twelve 

 days, during seven of which it was kept in the damp tin 

 jar, as above stated. It is an ordinary wet-season male, 

 not extreme in character. A well-marked wet-season 

 female, also in pupa twelve days, but under usual condi- 

 tions, emerged on Nov. 11. This may be the female 

 mentioned above. The only other bred specimen is a 

 well-marked wet-season male, decidedly darker than the 

 first. It emerged on Nov. 13, but there is no note as 

 to its duration in the pupal state. The remaining five 

 specimens were caught in the open. A female taken 

 on Nov. 6 is wet-season ; a pair on Nov. 12 are intermedi- 

 ate, as are two males taken on Nov. 14 and Nov. 16 

 respectively. 



" Estcourt, Dec. 14, 1890. — On my return here I attempted 

 a small test experiment as a converse of the former one, 

 viz., submitting pupse to dry warm conditions. My mochis 

 operandi was as follows : on a tripod stand I placed a round 

 tin containing a little water ; on the mouth of the tin was 

 a china saucer filled with dried sand, in which were placed 

 the pupas beneath an inverted glass, the water being 

 warmed by a spirit-lamp. Into this I put a suspended 

 larva of Byhlia ilithyia, a pupa seven days old, and another 

 two days old. I applied too much heat at first, keeping 

 the water at a boil, which killed the larva. I then turned 

 the lamp as low as possible, keeping the tin just hot 

 enough for the hand to bear. The older pupa emergetl 

 in tliree days (normal pupal stage, thirteen to fifteen days) 

 and presents no marked peculiarity, as you may see, being 

 of the early wet-season form, which was the only form 

 occurring at that time in the natural state. The last 



