154 Mr. C. B. Williams' Records of 



The weather from January to the middle of March had 

 been excessively dry in this district, but in the second half 

 of March some rain had fallen, wliich slightly relieved the 

 drying up of the vegetation. 



This is the first record, so far as I am aware, of a Lycaenid 

 migrating in this part of the world. There is one account 

 of a migration of a member of this family in India where 

 De Rhe Philippe (Journ. Bombay Nat. Hist. Soc, xiv, 

 p. 481) records that Polyonimatus boeticns migrates annually 

 to the hills in the early hot weather. I have not seen 

 the paper, which is refeired to in Ijefro}^, " Indian Insect 

 Life," p. 419. 



Hesperidae. 

 Calpodes elhlius migrating in Panmna. 



From 14th February to 25th 'June, 1917, I stayed at 

 various localities in the district of Bocas del Toro, Republic 

 of Panama, chiefly at a small settlement known as Guabito, 

 which is on the border-line of Panama and Costa Rica about 

 twenty miles inland from the Atlantic (C'arribean) coast. 



The country is mostly low-lying forest land with occa- 

 sional low foot-hills or spurs from the higher land further 

 in the interior, and is partly cleared for banana cultivation. 



The rainfall during January and February in 1917 had 

 been a little below the average, but the second week in 

 March was exceptionally wet, and eight inches of rain was 

 registered in twelve hours a few miles from Guabito; for 

 several weeks after this the forest was flooded in many 

 low-lying parts. 



On 2nd April I noticed a " moth-like insect " flying in 

 large numbers past the house at about 4 to 4.30 p.m., 

 flying very rapidly in a northerly (N.E. to N.W.) direction. 

 It was a hazy afternoon, practically no wind and the sun 

 just visible through thin clouds. 



On the following day (3rd April) at 4 p.m. the same 

 insects were again passing " ? in all directions." At 

 5 p.m. they were still flying in a slight rain. 



Two specimens were captured, and proved to be a 

 skipper (Hesperid) butterfly, since identified by Prof. 

 E. B. Poulton as Cal-podes ethlius CrsnaieT. 



On the following day (4th April) a careful watch was 

 kept, but none were seen either in the morning or evening. 



On the 5th April at 4.15 p.m. they were agam flying m 



