446 



The folio wdng preliminary notes are given regarding the locust 

 Cyriacanihacris nigricornis : The egg-stage lasts about 3-4 months. 

 The larvae moult six times and reach maturity after 2-2| months. 

 Mating takes place one month after the last moult. Eggs are deposited 

 from 3 to 7 times at average intervals of 12 days. The adult locust 

 lives for 4 months. 



Keuchenius (P. E.). Phytopathologische Aanteekeningen over Hevea. 

 [Phytopathological Notes regarding Hevea.] — Meded. Besoekisch 

 Proefstation, Djember, no. 24, 1917, pp. 49-54. 



A nocturnal borer of Hevea-, which confines its attack to the smooth- 

 scraped tapping surfaces, was reported from the Banjoewang district ; 

 it is probably a Scolytid beetle. Dihajnmus fistulator, Germ., was 

 bred from larvae boring into Hevea. Borer infestation of Hevea is 

 speedily followed by the cessation of the flow of latex. The larvae 

 must either be picked out or killed in situ by means of benzine. 

 Xylotnipes gideon, L., known as a pest of sugar-cane and coconut, 

 was noticed feeding on the latex, but this ciu:ious habit cannot be 

 classed as injurious. In 1916 about 346 acres of Hevea were defoliated 

 by Cyrtacantlmcris nigricornis. Laboratory specimens of this locust 

 (bred from the same egg-mass) mated and oviposited in February and 

 March. The resultant eggs required from 5 to 9 months to incubate, a 

 variation which accounts for the infestation lasting for half a year 

 and for the simultaneous presence of adults and larvae, both of which 

 thus belong to the same generation. Some eggs belonging to the 

 batch mentioned above had not hatched out after 9 months and were 

 accidentally destroyed before they did so. The newly hatched larva 

 is 7 mm. long ; it immediately begins feeding and grows rapidly. 

 The first moult occurs after 7-8 days and the second after an average 

 interval of 12 days. 



Rutgers (A. A. L.). Infektieproeven met een Schimmel, die patho- 

 geen is voor Insekten {Metarrhizium anisopliae (Metschn.) 

 Sorokin). [Infection Experiments with Metarrhizium anisopliae, 

 a Fungus pathogenic to Insects.] — Meded. Laboratorium voor 

 Plantenziekten, Buitenzorg, no. 25, 1916, 9 pp. 



The experiments described in this paper, were undertaken in order 

 to ascertain the value in Java of the fimgus, Metarrhizium. anisopliae, 

 and could not be completed, as the author was transferred to another 

 appointment. The results obtained with regard to Leucopholis rorida 

 and Cyrtacanthacris nigricornis are tabulated. Experiments were also 

 conducted with Oryctes rhinoceros. None of the results justify much 

 hope of this fungus being economically valuable against these insects. 



Rutgers (A. A. L.). Onderzoekingen over het ontijdig Afsterven van 

 Peperranken in Nederlandsch-Indie. III. De Pepercultuur in de 

 Lampongsche Districten. [Investigations on the premature 

 dying-out of Pepper Vines in the Dutch East Indies. III. Pepper 

 Cultivation in the Lam.pong Districts.] — Meded. Laboratorium 

 voor Planienziekten, Buitenzorg, no. 27, 1916, 65 pp., 14 plates. 



This third and last contribution on pepper and its diseases [see this 

 Review, Ser. A, v, p. 442] has had to be pubUshed while the 



