199 



Attempts should be made to destroy the small mammals that serve 

 as hosts. Ground squirrels may be poisoned with 1 oz. saccharine 

 -and 1 oz. bicarbonate of soda dissolved in 4 qts. water, with the 

 ■addition of | lb. gloss starch, the mixture being heated until it is 

 thick and stirred all the time ; 1 oz. powdered strychnine should then 

 be added and the mixture poured over 12 qts. of whole oats or 8 qts. 

 •crushed oats, so as to cover all the grain. A teaspoonful should be 

 placed in each hole, preferably on clean hard ground. 



Mote (D. C). Some Pests of Ohio Sheep. — Ohio Agric. Expt. Sta., 

 Wooster, Bull. 356, February 1922, pp. 53-79, 17 figs., 2 tables. 

 This is a popular account of parasites of sheep in Ohio, together 

 with their life-histories, the injury they cause and remedial measures. 

 The insects concerned are Oestrus ovis, L. (sheep bot-fly), Lucilia 

 sericata, Meig. (green-bottle fly), Phormia regina, Meig. (black blow-fly), 

 Melophagus ovinus, L. (sheep tick), Trichodectes sphaerocephalus, 

 Nitzsch (red-headed sheep louse), Haematopinus pedalis, Osborn (sheep 

 foot louse), and Psoroptes communis, Fiirst., var. ovis, Hering (common 

 :scab mite). Trichodectes climax and T. limbatus are common on goats, 

 though they are not found on sheep. Notes are given on such dips 

 as coal-tar creosote, cresol, nicotine and lime-sulphur. 



Haber (V. R.). Cockroach Pests in Minnesota with special reference 



to the German Cockroach. — Minnesota Agric. Expt. Sta., Univ. 



Farm, St. Paid, Minn., Bull. 186, August 1919, 16 pp., 7 figs. 



[Received 9th August 1922.] 



A popular account is given of cockroaches and their habits in 



■dwellings, and various traps and remedies for their suppression are 



described [R.A.E., B, v, 58; ix, 99]. The species dealt with are 



Blattella germanica, Blatta orientalis, Periplaneta americana and 



P. aiisiralasiae. 



Halpin (J. G.) & Hayes (J. B.). Fight Poultry Lice and Mites.— 



Wisconsin Coll. Agric, Exten. Serv., Madison, Circ. 56, revd. 

 April 1922, 8 pp., 3 figs. 

 This is a popular account of lice and mites on poultry. A sodium 

 fluoride dip, dusting and grease wifl all destroy these parasites, and 

 spraying with whitewash, kerosene, crude oil or coal tar is also 

 recommended. The commonest species are the louse, Menopon 

 pallidum, Nitzsch, and the mite, Dermanyssus gallinae, DeG. 



Bruce (E. A.). Fatalities in Cattle due to the Tick, Dermacentor 

 venustus. — //. Amer. Vet. ]\Ied. Assoc, Washington, D.C., Ixi, 

 N.S. xiv, no. 5, August 1922, pp. 537-539. 

 Two fatal cases of paralysis of cattle due to Dermacentor venustus 



■are recorded. Though this tick is the commonest species on cattle, 



with the exception of D. albipictus, no records have previously been 



made as to its causing injury to these animals. 



LuTz (A.). Zoologia Medica — Nematoceros Hematophagos nao perten- 



cendo aos Culicideos. [Blood-sucking Nematocera other than 



Culicids.] — A Folha Medica, Rio de Janeiro, iii, no. 12, 



15th June 1922, pp. 89-92. 



This paper contains notes on the classification and biology of 



Psychodid, Ceratopogonine and Simuliid flies, with particulars of the 



characters of these families and descriptions of some of the species. 



