20 
PAN-PACIFIC ENTOMOLOGIST 
Ross, H. H. 1965. Pleistocene events and insects. In Wright, H. E. and D. G. Frey (eds.), 
The Quaternary of the United States, pp. 583-596. VII Congress Int. Assoc. Quat. Res., 
Princeton University Press, N.J. 
Ross, H. H., and G. J. Spencer. 1952. A preliminary list of the Trichoptera of British 
Columbia. Proc. Entomol. Soc. British Columbia 48:43-51. 
Wiggins, G. B. 1977. Larvae of the North American caddisfly genera (Trichoptera). University 
of Toronto Press, Toronto and Buffalo, 401 pp. 
PAN-PACIFIC ENTOMOLOGIST 
Vol. 55, No. 1, p. 20 
SCIENTIFIC NOTE 
NEW HOST RECORD FOR CORYTHUCA DISTINCT A 
(HEMIPTERA: TINGIDAE) 1 
Drake and Ruhoff (1965, Lacebugs of the world: a catalog. U.S. Natl. 
Mus. Bull. 243: 148) record the host plants of Corythuca distincta Osborn 
& Drake as being Carduus lanceolatus and Cnicus sp. (Compositae), Lath- 
yrus nuttalii (Leguminosae) and hollyhock (= Althaea sp.) (Malvaceae). Spec¬ 
imens of C. distincta nymphs and adults (identified by R. C. Froeschner, 
U.S. Natl. Mus) were collected feeding on Cirsium pulcherrimum (identified 
by Burrell Nelson, Rocky Mountain Herbarium, Univ. Wyoming, Laramie) 
on July 28 and August 1, 1978 at Centennial, Wyoming. Not all the Cirsium 
plants in the patch were infested, but on severely infested plants, the tingids 
were present in such densities that all leaves were curled and necrotic. It 
was presumed that such plants would die. This infestation appeared to be 
an example of natural control by a native insect. According to Drake and 
Ruhoff (Ibid. 454-455), the only previous records for tingids feeding on 
Cirsium, are limited to five species of Tingis which feed on thistle in the 
Old World and in Asia. 
Footnote 
1 Published with the approval of the Director, Wyoming Agricultural Experiment Station, as 
Journal Article MP-42. 
Robert Lavigne and Don Roth, Plant Science Division, Box 3354, Univ. 
Stn., University of Wyoming, Laramie, 82071. 
