46 Bulletin of the Brooklyn Entomological Society Vol. XI 



ists have found that on the island of Luzon a large percentage of 

 the introduced plants is from the Acapulco region ; it is there- 

 fore not surprising that insects whose larvse thrive in decaying 

 fruit and the like, such as Volucella ohesa, Notogramma stigma 

 and this Euxesta, also have been introduced. 



In all the specimens before me the wings show, within the 

 transverse dark fasciae, black blotches upon a pale gray ground, 

 as shown in the figure. Finally, it may be added that in the na- 

 tional collection there is a series of a closely related but distinct 

 species, still undescribed, from Aguascalientes, Mexico. 



Seioptera vibrans Linne. — This species is generally distributed 

 through Europe and in North America occurs over the northern 

 part of the continent, ranging at least as far south as Washing- 

 ton, D. C. This fly occurs abundantly in certain localities ; it has 

 a characteristic habit of resting on the under surface of the 

 leaves of trees and vibrating its wings. In spite of its wide dis- 

 tribution and frequent local abundance there are few observations 

 on the hfe-history. Scholtz reared the flies in large numbers 

 from a mixture of horse-manure and earth (Zeitschr. Ent., Bres- 

 lau, 1849 and 1855). Sintenis, nearly forty years later, reported 

 it as occurring regularly under the windows of manure-beds or 

 cold-frames, thus confirming the record of Scholtz (quoted by 

 Mik, Wien. Ent. Zeit., Vol. 6, 1887, p. 216). Karsch, upon in- 

 formation from a correspondent, reports the larvae in destructive 

 numbers burrowing in the stems of Dianthus carthusianorum 

 (Berlin, Ent. Zeitschr., 1887, Sitzgsber., p. xxviii). No doubt 

 this last record has its origin in a faulty observation ; most prob- 

 ably the puparium sent to Karsch came from the manured earth 

 and the damage to the plants was due to some other cause. 



NOTE ON THE HABITS OF PSITHYRUS VARIABILIS CRESS. 



By Theodore H. Frison, Champaign, 111. 



In the Canadian Entomologist for March, 191 5, Mr. F. W. L. 

 Sladen records finding Psithyrus insularis Sm. in the nest of 

 Bombus flavifrons Cress, opened July 7, 1914, at Agassiz, British 



