102 Psyche [June 



theory that the movements of wasps are tropisms in the sense the 

 term is used by Loeb; nor is it apparent how it can be the result 

 of what Thorndike calls "trial and error" movements. Her whole 

 behavior is that of a creature struggling, against obstacles, to 

 attain a certain known place in a known environment. 



DIPTEROLOGICAL NOTES. 



By Charles W. Johnson. 

 Boston Society of Natural History. 



Chionea valga Harris. 



A specimen was found by Mr. J. H. Emerton while sifting for 

 spiders at Tyngsboro, Mass., December 6, 1911. This date was 

 more than three weeks prior to any snow in this section, and indi- 

 cates that the appearance of this insect on snow is merely acci- 

 dental. The imago probably emerges during the late fall and 

 passes the winter in that state. The difficulty in seeing this wing- 

 less gnat excepting when it happens to crawl upon the snow, makes 

 its life habits hard to study. 



Cholomyia longipes Fabricius. 



Mvsca longipes Fabr., Syst. Antl., p. 298, 1805. 



Cholomyia inipquipes Bigot, Bull. Soc. Ent. France, Vol. IV, 6 ser., pt. 2, p. 

 XXXVII, 1884. 



Thelairodes hasalis Giglio-Tos. Bull. R. Univ. Torino, VIII, No. 147, p. 3, 1893; 

 Ditt. del Mess. Ill, p. 65, 1894. 



Wliile studying some South American diptera, my attention 

 was called to a specimen which had been in my collection for some 

 time that had been collected by Mr. E. Daecke at Richmond Hill, 

 Long Island, N. Y., July 2, 1901. I was greatly surprised to find 

 that it agreed with a specimen from the Caura Valley, Venezuela, 

 collected by Mr. S. M. Klages. Recently Dr. O. A. Johannsen 

 spoke of a specimen taken at Ithaca, N. Y., which he identified as 

 C. inaquipes Bigot, as figured by Van der Wulp (Biol. Cent. Amer. 

 Dipt., II, 247, pi. 4, f . 1, 2.) This distribution is further augmented 

 by specimens in the National Museum from Peaks of Otter, Va. 

 (W. Palmer); Mo. (from Conotrachelus); and Marion, La., bred 



