1951] 
Chickering — Dictynidae 
157 
same locality, August, 1950. Several paratypes of both 
sexes from the same locality, July-August, 1950. 
Literature Cited 
Cambridge, O. P. 
1902. Arachnida-Araneida. Vol I. In Biologia Centrali-Americana. 
Dulau & Co., London. 
Chickering, Arthur M. 
1950. Three New Dictynids (Araneae) from Panama. Papers of the 
Michigan Academy of Science, Arts, and Letters, Vol. XXXIV, 
1948; published 1950. 
Gertsch, Willis J. 
1946. Notes on American Spiders of the Family Dictynidae. American 
Museum Ndvitates, No. 1319 (May 24, 1946) : 1-21. 
Petrunkevitch. Alexander. 
1925. Arachnida from Panama. Trans, of the Connecticut Academy of 
Arts and Sciences, 27 (July, 1925) : 51-248. 
Carnus hemapterus Nitzsch on a Screech Owl in 
Arizona (Diptera). — In 1942 I recorded this ectopara- 
site from a flicker in New York State and from a screech 
owl in Florida, and reviewed what was known of its 
distribution and natural history (Bull. Brooklyn Ent. Soc., 
37: 140-149). I was informed since that it was found in 
British Columbia and California, the details of these oc- 
currences to be published later by the discoverers. Mean- 
while I may record that it occurs also in Arizona. A 
collection of bird-flies, recently received from Professor 
George D. Butler, Jr., of the University of Arizona, con- 
tains 5 dealated specimens (3 males and 2 females) taken 
April 24, 1938, by Mr. S. L. Jacot on a nestling Arizona 
screech owl, Otus asio gilmani Swarth, 9 miles east of 
Tucson, at 2300 ft. altitude. No doubt the insect is widely 
distributed in North America, but overlooked owing to its 
small size (1.5 to 3 mm.). — J. Bequaert, Museum of 
Comparative Zoology, Cambridge, Mass. 
