854 EXPERIMENT STATION EECOED. 



insects tested, even L. macula, which eats the pustules, were therefore carrying 

 pycnospores almost exclusively. Most of the pycnospores were probably 

 brushed off from normal or diseased bark, or both, by the movements of the 

 insects over these surfaces. Some were probably obtained while eating the 

 pustules, and some may have been obtained from the soil around the bases of 

 diseased trees. 



" Most of the insects were also carrying spores of fungi other than E. para- 

 sitwa. The number of species of other fungi varied from to 7 in the cultures, 

 but was shown by microscopic examination of the centrifuged sediments to be 

 greater, in at least some cases. In proportion to size, insects may carry a 

 greater number of spores of the blight fungus than birds. 



"We are led to the conclusion that some insects carry a large number of 

 spores of the blight fungus, and that they are important agents in the local 

 dissemination of this disease. This is especially true of the beetle, L. macula." 



A list of 55 titles of the literature cited is appended. 



Hydrocyanic acid gas against household insects, L. O. Howabd and C. H. 

 PoPENOE (U. S. Dept. Agr., Fanners' Buh 600 (1916), pp. 8). — This is a revision 

 of Bureau of Entomology Circular 163, previously noted (E. S. R., 28, p. 352). 



Orthoptera of the Yale-Dominican expedition of 1913, A. N. Caudell {Proc. 

 U. S. Xat. Mus., .',7 {1015). pp. .',01--',05). 



The genera of the tettiginiid insects of the subfamily Rhaphidophorinse 

 found in America north of Mexico, A. N. Cai-dell (Proc. U. S. Xat. Mus., .J5 

 (1016), pp. 655-600, figs. 28). 



[Migratory locusts in South America] (Bui. Dept. Agr. Trinidad and 

 Tobago, I't (1015), No. 6, pp. 101-109, pis. 5).— Several papers are here pre- 

 sented relating to the subject, including A Report on Locusts in Venezuela, by 

 W. G. Freeman (pp. 191-194) ; ^\•tes on the South .Vmerican Migratory Locust 

 (Schistoccrca parancnsis), by F. W. Urich (pp. 194-197) ; Report on the 

 Inoculation of Locusts with Coccobacillus acridiorum, by J. B. Rorer (pp. 197, 

 198) ; and The Manurial Value of Locusts, by A. E. Collens (p. 199). 



Inoculation experiments with C. acridiorum show that its virulence can be 

 increased for the Venezuelan locust (S. paran<;nsis) in a way similar to that 

 used in Yucatan and Argentina. An experiment with the giant locust (Tropir 

 dacris dux) shows that the organism is virulent for it also. 



Jerusalem's locust plague, J. D. Whiting (Xat. Gcogr. Mag., 28 (1915), No. 

 6, pp. 511-550, figs. 25). — Tlie author reviews the history of former locust inva- 

 sions and describes and illustrates the great devastation caused by locusts ia 

 Jerusalem and the means that have been taken to combat them. 



Observations on Chennes spp. in Switzerland, N. A. Cholodkovskt (Russ. 

 Ent. Obozr., H (lOl.'i), No, 2-S, pp. LXXIX-LXXXIII ; abs. in Rev. Appl. Ent., 

 3 (1915), Ser. A, No. 7, pp. 34-3, 344). — This reports observations on the biology 

 of Chcrmcs spp. 



Identity of Eriosoma pyri, A, C. Bakeb (U. S. Dept. Agr., Jour. Agr. 

 Research, 5 (1016), No. 23, pp. 1115-1119, fig. i).— As stated by the author, this 

 paper was written in order to reinstate the woolly aphis described by Fitch from 

 apple (iJalus spp.) roots, to point out its distinctness from the woolly apple 

 aphis (E. lanigrrum), with which it has been confused, and to place it among 

 the species of the genus to which it properly belongs, namely, Prociphilus. In 

 his studies the author has had Fitch's original notes on the species and his 

 type of Prociphilus pyri at hand. Descriptive notes and figures of the species 

 of Prociphilus are given as an aid in the placing of P. pyri. 



Destruction of body lice, agents in the transmission of recurrent fever and 

 exanthematous typhus, by oil of eucalyptus, E. Sergent and H. Foley (Bui. 

 Soc. Path. Exot., 8 (1915), No. 6, pp. 378-381; abs. in Amer. Jour. Trop. Diseases 



