44G 



froximus, sp. n., from cotton seed infested by P. gossypiella ; Bracon 

 sp., from ginning machines ; an Ichneumonid, Scamhus {Epiums) sp.,. 

 from cotton in the seed ; Apcmteles {Urogaster) balthazari, Ashm., 

 from infested green bolls and seed ; and a Bethylid, Parasierola 

 nigrifemur, Ashm., in unginned cotton stored in ginneries. 



Col6n (E. D.). El Sulfate de Amoniaco como Insecticida. [Sulphate 

 of Ammonia as an Insecticide.] — Puerto Rico Estacion Expt. 

 Insular, Rio Piedras, Circ. 15, April 1919, 6 pp. [Received 12th 

 August, 1920.] 



Ammonium sulphate is the chemical most commonly used in Porto 

 Rico as a nitrogen fertiliser in the cultivation of sugar-cane, and its 

 value as an insecticide at the same time is worthy of consideration. 

 In France it has already been largely used against Phylloxera on vines,, 

 both as a spray and, mixed with lime, in injections into the soil. 



The experiments with this substance iu the control of grubs of 

 Lachnoster)ia [R.A.E., A, vi, 377] are referred to, the conclusion drawn 

 from them being that ammonium sulphate applied to a sowing of 

 sugar-cane at the beginning of the season does not prevent the deposi- 

 tion of eggs of Lachiosterna on the plants, but it kills a great number of 

 the grubs while its action in the soil lasts. Records of the use of this 

 substance in Queensland are also quoted. Trials are being made with 

 it in Porto Rico, the results of which will be published, and meantime 

 sugar-cane growers are asked to experiment with regard to the quan- 

 tities to be used, number and times of application, etc., and to com- 

 municate their experiences to the Experiment Station. 



Smyth (E. G.). Report of the Division of Entomology. — Ann. Rept., 

 Porto Rico Insular Expt. Sta.. 1918-19, Rio Piedras, 1919, pp. 

 27-31. [Received 12th August 1920.] 



During the year further investigations were made with regard to the 

 transmission of sugar-cane mottling disease by insects, but no definite 

 conclusions have so far been reached. Experiments with the paraffin 

 oil emulsion recommended in a previous report [R.A.E., A, vi, 487] 

 show that for the control of scale-insects on Citrus the spray should be 

 applied twice at an interval of from 1 to 2 weeks. 



This spray has proved useless against Pseiidococcus nipae, Mask., 

 on guava trees. 



Hayes (W. P.). Solenopsis molesta, Say. (Hym.) : A Biological 

 Study. — Kansas Agric. Expt. Sta., Manhattan, Tech. Bull. 7, 

 June 1920, 55 pp., 11 figs. 



Much of the information contained in this bulletin concerning the 

 damage caused by SoleJiopsis molesta, Say, and the remedial measures 

 advocated, has been noticed elsewhere [R.A.E., A, iv, 184]. 



In addition to the species mentioned as being attacked by this ant> 

 it is known to feed also on Craponius inaeqvalis (grape curculio), 

 Conotrachelus juglandis (walnut curculio), Anthonomus grandis 

 (cotton boll weevil), the eggs of Blissus leucoiMrus (chinch bug), 

 Cydia (Carpocapsa) ponwneUa (codling moth), Papaipema nehris 

 {nitela) (corn-stalk borer), eggs of various grasshoppers, Megilla 



