483 



ants. If ants nesting indoors are not attracted by any of these baits, 

 3 grammes sodinm arsenite thoroughly mixed in a cupful of warm 

 lard or similar grease may be effective. 



An excellent barrier for ants is |-inch cotton tape treated with a 

 saturated solution of corrosive sublimate in water. Only porcelain, 

 glass or granite-lined vessels should be used for its preparation, as it 

 corrodes metals, and the solution should be filtered before the tape 

 is soaked in it. This will form a protection for shelves, tables, and 

 even rooms, and usually remains effective for a year. 



Severin (H. C). Clothes Moths. — 5. Dakota State Ent., Brookings, 

 Circ. 21, November 1920, 10 pp., 2 figs. [Received 5th August 

 1921.] 



Three species of clothes moths occur in the United States : Tineola 

 {Tinea) hisellieUa, Humm., Tinea pellionella, L., and Trichophaga 

 tapetzella, L. The first two have been found in South Dakota. 



The life-history of T. hiselliella is described [R.A.E., A, vi, 48, 

 433]. 



Some of the remedial measures recommended have already been 

 noticed [R.A.E., A, vi, 532]. Fumigation with 2 lb. sulphur per 

 1,000 cubic feet in buildings, with a temperature not less than 

 70° F. for 12 hours, is effective, but is liable to bleach materials and 

 tarnish metals. Clothes liable to attack should be shaken, brushed 

 and exposed to sunlight. Uninfested materials should be stored in 

 boxes with one teaspoonful carbon bisulphide for each cubic foot of 

 space. Gasoline or benzine can be used on upholstered furniture. 

 A temperature of 140° F. kills the moth at all stages in an hour, and 

 larvae kept in a temperature of 18° F. for some time, suddenly trans- 

 ferred to 50° F. for a day, and then returned to a lower temperature, 

 were killed. The larvae remain dormant at temperatures below 40° F. 



Severin (H. C). The Large Willow Sawfly. — S. Dakota State Ent., 

 Brookings, Circ. 22, November 1920. 4 pp., 1 fig. [Received 

 5th August 1921.] 



The large willow sawfl}^ {Cimbex americana. Leach) is one of the 

 most serious willow pests in South Dakota. It is reported from other 

 States as also feeding on elm, linden, maple and poplar. The larvae 

 cause the most injury by defoliation, and the adults cause slight 

 damage by girdling the stems. 



Eggs are deposited in the tissues on the lower surface of the leaf. 

 As many as 500 eggs may be laid by one individual. The larvae 

 hatch in eight days and feed upon the leaves. In the latter part of 

 August they form cocoons among dead leaves or in the soil under the 

 trees, and pupate in spring. The pupal stage lasts two weeks, and the 

 adults emerge early in June. 



This sawfly has a considerable number of parasitic and predaceous 

 enemies, but they are not sufficient to control it. The most satisfac- 

 tory sprays, for use when the larvae appear, are 1 lb. lead arsenate 

 paste or \ lb. powder to 25 U.S. gals, water ; ^ lb. Paris green and 

 J lb. freshly slaked lime to 25 U.S. gals, water ; or | lb. calcium 

 arsenate and ^ lb. freshly slaked lime to 25 U.S. gals, water. When 

 there are only a few trees, cocoons found underneath the trees should 

 be raked up and burned in the late autumn or early spring. 



