316 



The plan adopted was to collect numbers of 0. pratensis from the 

 province of Buenos Aires in the month of December, and transfer 

 them to the northern provinces where they were placed upon low- 

 growing trees, for preference acacias. There they were left for a 

 month or six weeks in order to become parasitised, and were then 

 taken back to the original area of infestation. The parasites, having 

 completed their development in the host, emerged to parasitise fresh 

 bagworms in the infested zone. The possibilities of acclimatisation 

 in this region cannot yet be estimated, but it is hoped that a successful 

 means of control of 0. platensis has thus been found. 



The parasites introduced by this method were Eurytoma caridei, Br. , 

 Perissocentrus argentinae, Crawf., P. argentinae var. caridei, Br., and 

 Lindesonium caridei, Br., detailed descriptions of which are given. 



Brethes (J.). El Piojo del Pino, Leucaspis pini, Hartig. [The Pine Scale, 

 Leucaspis pini, Hartig.] — Anales Soc. Rural Argentina, Buenos 

 Aires, li, no. 5, July 1917, p. 384, 1 fig. [Received 24th May 1918.] 



A branch of pine infested with Leucaspis pini, Hart. , chiefly in the 

 larval stage, is recorded from the south of the province of Buenos 

 Aires. A description is given of the larva, which apparently has not 

 been previously recorded. It is not known whether there is more 

 than one generation a year. While such parasites as Aphelinus spp. 

 probably play some part in the control of this scale, nothing definite 

 is known on this point. The best insecticide has proved to be a 

 petroleum emulsion, 4 parts black soap to 15 parts water, adding 

 gradually 10 parts petroleum until an emulsion is formed. This 

 mixture, diluted with 15 to 20 parts water, is used as a fine spray. 



Barbara (B.). Valor del Coccobacilhis acridiorum, d'Herelle, para 

 destruir la Langosta. [Value of CoccobaciUus acridiorum, cVHerelle, 

 in the Destruction of Locusts.] — Afiales Soc. Rural Argentina, 

 Buenos Aires, li, no. 5, July 1917, pp. 38-5-387. [Received 24th 

 May 1918.] 



This paper records the investigations undertaken by the Argentine 

 Commission to determine the value of CoccobaciUus acridiorum,d'}ieie\\e, 

 in the destruction of locust swarms. The conclusions reached are that 

 this organism, even with a highly increased virulence, cannot produce 

 a general epizootic by the pulverisation method. It is found nor- 

 mally in the intestines of healthy locusts, and from healthy insects 

 is virulent in abdominal injections, being effective in 24 hours, but 

 infection does not occur by ingestion. The results arrived at by other 

 workers on this subject are also mentioned. The question has been 

 more fully dealt with in another paper [see this Review, Ser, A, vi, 

 p. 177]. 



Brethes (J.). El Bicho moro, {Epicauta adspersa, Epicauta atomaria). 

 El Pequeno Escarabajo negro {Dyscinetus gagates, Burm.). [The 

 Meloid beetles, Epicauta adspersa and E. atonuiria. The small, 

 black, injurious Beetle, Dyscinetus gagates, Burm.].- — Anales Soc. 

 Rural Argentina. Buenos Aires, li, no. 8, October 1917, pp. 591- 

 601, 2 plates, 1 fig. [Received 24th May 1918.] 



The adults of the Meloid beetle, Epicauta adspersa, oviposit in 



