B. 



Records of Migrations of Dragon Flies, especially 



LiBELLULA QUADRAMACULATA, FROM 1868 TO 1888. 



By WILLIAM BEUTEXMULLER. 



Since the paper on migrations and swarms of dragon flies by 

 Mr. E. T. Koppen, published in the Stett. Ent. Zeit., pages 183-188, 

 1871 (ante, page 21), I am not aware that a continuation of this 

 paper af)peared. I therefore add the following records : — ■ 



1761. Abbe Chappe (Journ. to Siberia, pages 236 and 237, 1770) no- 

 tices, on July 2d, an immense swarm of dragon flies mi- 

 grating from north to south. 



1867. Pryer (Journ. N. China Branch Roy. Asiatic Soc, vol.iv., pages 

 75 and 76) notices great swarms of dragon flies m Japan. 



1872. Kuwert (Stett. Ent. Zeit., xxxiv., pages 374 and 375) notes on 

 great swarms of dragon flies observed in Prussia in May. 



1878. Thomson (Ent. ]M. jMag., xvi., page 280) notes on the abun- 

 dance of dragon flies at Zanzibar. 



1880. Schaitter (Sitzb. z. b. Ges. Wien, xxx., page 40, and Ent. 

 Nachr., vi., pages 133 and 167) notes on great swarms of Lib. 

 4-maculata and L. depressa observed in Galicia, in May. 



1880. Anony. (Feuill. Nat., x., page 15) record of a great swarm of 

 Libellula observed at Havre, on Octoljer 7th. 



1880. Torrey (Am. Nat., xiv., page 132) records an enormous swarm 

 of dragon flies at Weymouth, Mass., on June 2d. The col- 

 umn was at least a quarter of a mile in width and the mi- 

 gration lasted all day. On the 2:]d of the same month a 

 similar swarm was observed near Boston. Both swarms 

 were flying westward. 



1880. Van Bemmelen (Tijdschr. Ent., xxvii. ; Verslag, page 91) 

 records a swarm of dragon flies in the Rotterdam Zoo- 

 logical Garden in June. 



1880. Chyzer (Rov. Lapok., i., page 125) records a swarm of Lib. 

 depressa and Agrion pulchellum in Hungary, May 8th, 



1880. Eiiner (Biol. Centralb., i., pages 549-557) notes on a migra- 

 tion of Lib. scolica in September, and also refers to a swarm 



(161) 



