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VI. Records of Insect Migrations in Tropical America. By 

 C. B. Williams, M.A., F.E.S., Department of 

 Agiiculture, Trinidad, B.W.I. 



[Read March 17th, 1920.] * 



In two previous papers (Trans. Ent. Soc. 1917, pp. 154-164, 

 and 1919, pp. 76-88) I have given as complete accounts as 

 possible of migrations of butterflies in British Guiana and 

 Trinidad respectively, that I had either seen myself or 

 considered sufficiently reliable to be placed on record. No 

 apology is made for this further instalment of records, 

 this time relating to several different insects in several 

 countries, as it is only by the piling up of a sufficient bulk 

 of reliable evidence that any progress can be looked for; 

 and such evidence to be of the greatest value should be 

 available to all and should not be hidden away in private 

 notes or obscure publicatioiis. 



The following are the migrations described or discussed 

 below :■ — ■ 



LEPIDOPTERA. 



PlERlDAE. 



U.S.A. and West Indies. 



TRANS, ent. soc. LOND. 1920.-r-PARTS I, II. (JULY) 



