162 DRAGOX FLIES VS. MOSQUITOES. 



seen in the Engadine (Reprod. in Stett. Ent. Zeit., xliii., 

 page 260, and abstr. in Jahrb. Verb. Wurtb., xxxviii., 

 pages 105-113. 



1880. Godlin (Zoo. Gart., xxv., j)age 125) records Calopteryx virgo 



in a migratory swarm at Lake Neuchatel on September 

 17th, flying from northeast to southeast. 

 1880 (?) Glulian (Bull. Ent. Soc. Ital., vi., pages 227 and 228) record 

 of the invasion of Anax ephippigera in Italy. 



1881. Torrey (Am. Nat., xiv., page 594) records a migration of 



dragon flies, on May 24th, at West Hill, in Melrose, Mass. 

 1881, Mundt (Can. Ent., xiv., page 56, and Rep. Ent. Soc. Ont., 



page 31, 1882) records migration of a swarm of JEschna 



heros in Illinois, and also the abundance of Anax Junius 



Drury. 

 1881. Landwehr (Ent. Nachr., vii., page 280) records an immense 



swarm of Lib. 4-maculata at Bielefeld on May SOth, flying 



towards the northwest. 

 1881. Weidinger (Ent. Nachr., vii., 187) records an immense swarm 



of Lib. 4-maculata that passed over Dresden on May 28th. 

 1881. Ent. Nachr., vii., page 216, note on swarms of Lib. 4-maculata 



in the Neisse Valley, one of which took two hours to pass. 



1881. Blasius (Jahrb. Ver. Braunschw., iii., pages 72-77) records on 



a large swarm of Lib. 4-maculata through North Germany. 



1882. Riveau (Feuill. Nat., xii., page 123) records that every year 



large migi-ations of Lib. 4-maculata take place in Charento 

 Inferieure at the end of September. 



1882. Fokker (Tijdschr. Ent., xx.; Verslag, page 16) records an 



immense swarm of Lib. 4-maculata which appeared on 

 May 30th in Zierikzee, Holland, from 11 A. M. till 11 P. M.; 

 they came from southwest. 



1883. Newman (Nature, xxviii., page 271) records immense swarms 



of Lib. 4-maculata which appeared at jNIalmu, Sweden, 

 from June 25th to the 27th. 



1884. Van Hasselt (Tijdschr. Ent., xxviii., Verslag, page 12) re- 



cords a migratory swarm of Lib. 4-maculata seen at the 

 Hague, on July 10th. 



1885. Campbell (Ent. M. Mag., xxi., page 192) records a migratory 



swarm of ^Eschna mixta observed along the banks of the 

 Gironde, in France. 

 1888. Pender (Ent. M. Mag., page 96) record of a migratory swarm 

 of LibeluUa 4-maculata. 



