28 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY. 1891. 



entirely failed, these species disappeared, and were replaced by Arho- 

 'pala, which, were very numerous both in species and individuals. 



At the end of May I made an attempt to get from Kan to Haka, 

 the latter being the military post recently established in the Chin 

 Hills from the Burma side ; however, I was knocked over with 

 fever at Choungkwa the second march out, and had to return ; 

 but still on the road out I was fortunate enough to obtain several 

 species I had not before met with. Choungkwa is at an elevation 

 of only 1,760 feet, but though not much higher than Tilin, it is very 

 differently situated, as Tilin is practically on the highest ground 

 for some miles round, while Choungkwa is iu a hollow surrounded 

 by hills on all sides, those immediately over it rising almost unin- 

 terruptedly to a height of between four thousand and five thousand 

 feet. 



It will be seen that of the 276 species recorded no less than 257 

 were obtained at Tilin, and this list is by no means exhaustive, as 

 during the last fortnight of my stay there I caught nine species not 

 previously obtained. The months during which the collection 

 was made practically represent the dry season, as normally the rains 

 cease in Yaw about the end of October and commence again in June, 

 though as a matter of fact in 1889 the rains were unusually late, 

 and did not cease till the end of November ; still this did not affect 

 the butterflies to any great extent, as there had been a longish break 

 early in November, and consequently almost entirely dry-weather 

 forms were obtained. In connection with these forms it is worthy 

 of note that during the last week in March and during the whole of 

 April and May, Junonia a^teric, which is almost without doubt the 

 dry-season form of J. almond, occurred with the latter in about 

 equal numbers. I am unable to account for this in any way ; there 

 was a mango shower early in March, but absolutely no rain from 

 then till the end of April, so it cannot be accounted for by the 

 chrysalides having been affected by damp and the imagines so 

 modified, as is probably often the case. The two forms of Cato- 

 dhrj/sbps pandava also appeared without any particular regard to 

 their proper seasons. I am unable to say what the rainfall is in 

 the Yaw district, but at Tilin it is probably about 100 inches ; at Po- 

 koko the rainfall is usually something under 30 inches. 



