484 



Severin (H. C). The Tent-caterpillar and the Fall Webworm. — 



S. Dakota Stale Ent., Brookings. Circ. 23, November 1920, 

 10 pp., 4 ligs. [Received 5th August 1921.] 



The tent-caterpillar {Malacosoma americana, F.) and fall webworm 

 [Hyphantria cunea, Drury) are serious pests of fruit and shade trees 

 in South Dakota. 



There is a considerable number of natural enemies of M. americana, 

 though the}' are not always sufficient to control this moth. The 

 following sprays are recommended when the nests appear, early in 

 ]\Iay : 1 lb. lead arsenate paste or i lb. powder to 40 U.S. gals, water ; 

 or 1 lb. Paris green and 1 or 2 lb. freshly slaked lime to 150 U.S. gals, 

 water. The latter spray should not be applied to plum foliage. WTien 

 the nests appear on the trees, the caterpillars may be destroyed 

 by burning, or pruning out the webs and dipping them in pure 

 kerosene. Egg-clusters should be collected when the trees are 

 dormant. Worthless trees in which the pest breeds should be 

 destroyed. 



H. cunea is more abundant than M. americana, and in South 

 Dakota attacks all deciduous trees and shrubs. Natural enemies 

 cannot be relied on for complete control, and the measures recom- 

 mended for M. americana can also be used against it. The egg- 

 masses, however, are usually impossible to discover. 



Severin (H. C). The Army Worm. — 5. Dakota State Ent., Brookings, 

 Circ. 24, November 1920, 10 pp., 4 figs. [Received 5th August 

 1921.] 



CirpJiis unipimcta. Haw. (army worm) does a certain amount of 

 damage in South Dakota each year, but it is only in occasional seasons 

 that conditions are so favourable to this moth and its parasites so 

 scarce that crops are ver}^ seriously attacked. There are two genera- 

 tions in a year, and it is during July and August that the greatest 

 damage is done. From 2 to 2\ months are required for the life-cycle 

 of the summer generation, and 9^ to 10 months for the overwintering 

 one. A description of the various stages and their habits is given. 



When natural enemies, such as the Tachinid parasite, Winthemia 

 quadripnstulata, F., and such predators as insects, birds, poultry, 

 toads and skunks, and fungus diseases, are insufficient to control the 

 caterpillars, the usual remedial measures should be employed [R. A.E., 

 A, viii, 129]. 



WoLcoTT (A. B). North American Predaceous Beetles of the Tribe 

 Tillini in the United States National Museum. — Proc. U.S. Nat. 

 Mus., Washington, lix, no. 2370, 1921, pp. 269-290, 1 plate. 



This catalogue of Clerids includes descriptions of nine new species 

 and one new variety. Provisional tables are given of the North 

 American species of Cymatodera, Gray. 



ScHAEFFEK (C). Ncw Spccics of North American Clerid Beetles of 



the Genus Anlicus. — Proc. U.S. Nat. Mus., Washington, lix, 

 no. 2365, 1921, pp. 151-159. [Received 5th August 1921.] 



A key is given to the North American species of the genus Aulicus, 

 and four new species are described, of which A.fissipes has been taken 

 on cotton. 



