363 



Lawson (P. B.). The Cicadellidae of Kansas.— /Kansas Univ. Set. 

 Bull., Lawrence, xii, no. 1, 15th March 1920, 306 pp., 17 plates. 

 [Received 9th May 1922.] 



This systematic treatise on the Cicadellidae of Kansas aims at 

 providing something more than a mere State list, of which live have 

 already been published, and offers much material for study of the native 

 forms. Keys are included for the separation of all the groups down 

 to species, with descriptions of all species known to occur in the State, 

 and food-plant and locality records have been added wherever possible. 

 Brief notes on the economic importance of the family are given. No 

 attempt has been made to give a detailed description of the morphology, 

 but an original study of the internal male genitalia is included. 



Gahan (A. B.). U.S. Bur. Ent. A New Hymenopterous Parasite 

 upon Adult Beetles. — Ohio Jl. Set., Columbus, xxii, no. 5, March 

 1922, pp. 140-142. 



The Braconid, Syrrhizus diabroticae, sp. n., is described from Ohio, 

 where it is parasitic upon Diabrotica vittata (cucumber beetle) to the 

 extent of about 1 or 2 per cent, in the summer, and somewhat 

 more commonly in May and June. The egg of the parasite is deposited 

 in the thorax of the host, apparently through one of the sutures near 

 the base of the elytra. The larva feeds internally and when mature 

 escapes fromi the body of the host, which is killed, though not outwardly 

 defaced. The parasite pupates just below the surface of the soil in a 

 closely woven silken cocoon, pupation lasting about ten days. 



The species does not fully agree with the characterisation of the 

 genus Syrrhizus, Forst., but considering the evident intergradation 

 of the differentiating characters, it seems more reasonable to place it in 

 'this genus than to erect a new one for it at the present time. 



Parrott (P. J.). Control of Sucking Insects by Dusting. — New 



York State Fruit Grower, Albion, vi, no. 3, March 1922, pp. 10, 

 11, 14, 17, 18. 



This article has already been noticed from another source [R.A.E., 

 A, X, 325]. 



Parrott (P. J.), Glasgow (H.) & MacLeod (G. F.). Control of 

 Apple Red Bugs by Dusting. — New York Agric. Expt. Sia., 

 Geneva, Bull. 490, November 1921, 30 pp., 5 plates. [Received 

 9th May 1922.] 



Apples in New York State are severely damaged by the attacks 

 of the plant bugs, Lygidea mendax, Reut., and Heterocordylus malinus, 

 Reut., which cause knotty,, deformed apples and premature dropping 

 of young fruits. 



The remedy for this form of injury has generally been spraying 

 mixtures containing nicotine sulphate. Dusting preparations containing 

 0-25, 0-50, 1-0 and 2-0 per cent, of nicotine were toxic to the bugs 

 [cf. R.A.E., A, X, 305]. Spraying mixtures at standard strengths 

 also gave good results. Nicotine sulphate at the strength of J or | pint 

 to 100 gals, of either soap or lime-sulphur solution showed considerable 

 toxicity. Larger amounts of nicotine, either in dust or spray, gave 

 on an average more uniform results and displayed higher killing power. 

 The cost for both sprajdng and dusting is variable, depending on labour, 



