142 



Webster (R. L.). Two Strawberry Slugs. — Iowa Slate Coll. Agric. 

 Exp. Sta., Ames, Bull. no. 162, November 1915, 19 pp. 11 figs. 

 [Received 17th January 1917.] 



The habits of Empria fragaria, Rohwer, and E. maculata, Norton, 

 are described. The former usually appears before the fruit is ripe and 

 the latter after this. These sawflies do similar damage to the plants, 

 eating out more or less irregular holes in the foliage. E. fragaria may 

 be controlled by spraying with lead arsenate paste 2 lb. to 50 U.S. 

 (42|^ Imp.) gals, of water, or zinc arsenite 1 lb. to 100 U.S. (85 Imp.) 

 gals, of water. Both are effective and should be applied immediately 

 before blossoming. E. maculata has not been common enough to 

 justify any trial spraying experiments. Arsenical sprays cannot be 

 used on account of its being present after the fruit has set ; should a 

 control measure be necessary, an application of hellebore, which must 

 be fresh, is suggested. E. fragaria has only been noted on strawberries, 

 but E. maculata has been found attacking raspberries and also on 

 Potentilla canadensis. Besides being distributed generally throughout 

 Iowa, the former has also been recorded in Illinois and Missouri, 

 while the latter has been found widely distributed throughout the 

 eastern part of North America, Ontario, Saskatchewan, Indiana, Illinois 

 and Missouri. 



A bibliography of 30 references is given. 



Webster (R. L.). The Hessian Fly. — Iowa State Coll. Agric. Exp. 

 Sta., Ames, Circular 22 (Revised), July 1915, 44 pp., 6 figs. 

 [Received 17th January 1917.] 



The Hessian fly {Mayetiola destructor, Say) is dealt with briefly in 

 this circular. It is more prevalent in the southern half of the State 

 than in the northern. It infests wheat, rye and barley, and certain 

 wild grasses to a slight extent. The control measures recommended 

 are those which have already been advised for this insect [see this 

 Revieiv, Ser. A, iii, p. 416]. 



Webster (R. L.). Common Corn Insects. — Iowa State Coll. Agric. 

 Expt. Sta., Ames, Circular no. 23, June 1915, 16 pp., 15 figs. 

 [Received 17th January 1917.] 



Recommendations for the control of the following pests of maize are 

 given : — The common wheat wire-worm (Agriotes mancus, Say) ; 

 Melanotus spp. ; corn root aphis {Aphis maidiradicis, Forbes) ; 

 northern corn root-worm {Diabrotica longicornis. Say) ; southern corn 

 root- worm {D. duodecimpninctala, Oliv.) ; white grubs {Lachnosterna 

 spp.) ; corn bill-bugs (Sphenophorus spp.) ; cutworms ; chinch bug 

 (Blissus leucopterus, Say) ; and the corn ear worm {Heliothis obsoleta, ¥.). 



Solomons (C. C). Cassia nodosa tree defoliated by Caterpillars of 

 Catopsilia pomona, F. — Spolia Zei/lanica, Colombo, x, no. 38,. 

 November 1916, p. 281. [Received 18th January 1917.] 



A severe infestation of certain trees in Victoria Park by caterpillars 

 of Catopsilia pomona, F., in enormous numbers is recorded. They 

 were devoured wholesale by crows {Corvus splendens), which materially 

 helped to control the damage that would otherwise have been done. 



