.•^30 Mr. L. 1). Clearo on 



and iis t.lu> bu<^gy di'ovc tlu'()U<ili the swarm tlicv wore 

 (list-iirbod, jind striking against the spokes made a decided 

 t:il)j)in{j; sound. The insects alighted on the same spot 

 after tlie buggy had passed a lew hundred yards. 



7. Mazaruni Kiver, Sansankopai. Yellow butterflies 

 were clustered together on a sandbank on an island in the 

 middle of the river. The ])atch was not as large as the 

 Potaro patch mentioned ;ibove. Mr. Winter camiot give 

 the date of this observation. 



8. Yawakuri iiiver, June 11)11). A small boat that ha,d 

 suidc in the river was ])artially exposed and on one of the 

 ex])osed pai'ts was a small j)a,tch of sand, deposited while 

 the river was nuicli higlu^r. The sand was then quite dry, 

 and in strong sunlight. On this small patch of sand about 

 a dozen yellow butterilies had collected. 



9. Pomeroon Jliver, Issururu Creek, March 11)20. A 

 large tree had fallen and was stretched across the creek, 

 supported on one side by its roots and on the other by the 

 thick mass of branches, it was in this way not submerged. 

 Home of the branches, however, were in the water, and 

 arinmd these a small sandbank had gradually formed. 

 A part of the bank was well above water, and quite dry, 

 so dry that the sand was beginning to blow ; it was also 

 in the full heat of the sun. On this patch of sand about 

 twenty yellow butterilies had ct)llected. Mr. Winter first 

 observed them about 1) a.m., and on his return to camp about 

 5 p.m. they were still there. Occasionally one of the butter- 

 flies wcndci leave the swarm and lly olf to one of the nearby 

 trees, but in a few minutes it woidd return again. 



Catopsilia statira C*ram. 



10. Mr. A. A. Abraham, Horticultural Superintendent 

 of this Department, while engaged on an agricultural survey 

 of the Ivupmiuni Cattle Trail, collectetl live butterilies from 

 a migration which took place on the Yawakuri Savannahs 

 on June l(i, 11)11). and forwarded them to the J^iological 

 Divisioji. These insects proved to be Catopsilia slaiira 

 Cram., and were all males. 



In a letter to me he says : " The specimens I collected 

 were taken on the wnng and the flight was then directly 

 across the Yawakuri Savannahs; the migration was also 

 across the Berbice Iliver. . . . The insects were travelling 

 in very large numbers and with a steady flight, but 1 do not 



