February, '23] 
GLENN: ONION CAPSID 
79 
older nymphs and adult bugs, and the larvae of this generation pass the 
winter within the body of the host. None of the bugs parasitized by 
the second generation flies appear to live long enough to oviposit the 
following spring. Thus, although the efficiency of the parasite has been 
questioned, due to the fact that parasitized female bugs have been ob¬ 
served laying eggs, (1) p. 26; (2); (5) p. 21, it would seem that the para¬ 
site is capable of causing a considerable reduction in numbers of the 
host in Massachusetts. 
(1) Chittenden, F. H. 
(2) Packard, A. S. 
(3) Vinal, Stuart C. 
(4) Wadley, F. M. 
(5) Weed, C. M. & 
CONRADI, A. F. 
Literature Cited 
“Some Insects Injurious to Garden and Orchard 
Crops," U. S. D. A., Div. Ent. Bull. 19, N. S., 1899, 
pp. 20-28. 
“A Tachina Parasite of the Squash Bug,” American 
Naturalist, Vol. IX, p. 519, 1875. 
“The Greenhouse Red Spider Attacking Cucumbers 
and Methods for Its Control." Mass. Agr. Exp. 
Sta. Bull. 179, 1917. 
“The Squash Bug,” Journ. Econ. Ent., Vol. 13, No. 5, 
pp. 416-425, 1920. 
“The Squash Bug," New Hampshire Agr. Exp. Sta. 
Bull. 89, 1902. 
Past President Dean: We will now listen to a paper on “The Onion 
Capsid,” by P. A. Glenn. 
THE ONION CAPSID, ORTHOTYLUS TRANSLUCENS TUCKER 
By P. A. Glenn, Chief Inspector , Division of Plant Industry , 
Department of Agriculture , Urbana, III. 
Abstract 
The onion Capsid, Orthotylus translucens, occurs in Illinois on wild garlic and 
attacks onions. The life-cycle is briefly summarized and spraying with whale oil 
soap recommended, Burning over garlic fields and fall plowing are excellent preven¬ 
tives. 
This insect pest was seen by the writer at Olney, Illinois, May 15, 
1915, on cultivated onion, and was identified for me by C. S. Spooner. 
The species was described by Elbert S. Tucker from a single male speci¬ 
men collected in 1894 in Cheyenne Canyon near Colorado Springs. The 
description was published in Volume IV (old series) XIV (new series) 
No 2, University of Kansas Science Bulletin , 1907. The type is now 
in the collection of the University of Kansas. Mr. Tucker makes the 
