536 



being on it in the morning. Zinc phosphide has not been commonly 

 used as an insecticide ; it is said to give good results against cock- 

 roaches. A method suggested, but which could not be tested, was 

 crushing the locusts with a farm tractor with wide-flanged wheels. 



GiRAULT (A. A.). Javanese Chalcid-Flies. — Tteubia, Batavia, i^ 

 no. 2, August 1919, pp. 53-59. 



The following are among the species recorded : Coccophagus tristis, 

 Zehnt., reared from pupae of Aleurodes bergi on sugar-cane at 

 Gordonvale, Queensland, and new to the Australian fauna ; Philo- 

 trypesis javae, sp. n., from fruits of a wild Ficus in Central Java ; 

 Ana-status locustac, sp. n., from Locustid eggs in twigs of Coffea robusta 

 in Eastern Java ; and Neocatolaccus vandinei. Tucker, infesting 

 Pachymerus sp. in Java. 



RoEPKE (W.). Xyleborus destruens, Bldfd. (Col. Ipidae), schadlich 



fur Djati (Tectona grandis). {Xyleborus destruens injurious to 

 Teak.] — Treubia, Batavia, i, no. 2, August 1919, pp. 68-71, 16 

 figs. 



The Scolytid beetle. Xyleborus destruens, Bldfd., is common in Java 

 in old cacao plantations, where it abounds in old stems attacked 

 by canker. From the numerous bore-holes in the diseased tissues 

 cords of whitish, loosely-packed frass protrude. Until recently 

 diseased cacao trees were the only plants attacked, so that the injury 

 was of little economic importance, but A', destruens has now been 

 observed on young teak trees in Central Java, its habits there being 

 very different from those hitherto recorded. As Blandford's description 

 is incomplete both sexes of this beetle are re-described. 



RoEPKE (W.). HyahpepJus smaragdinus. n. sp., eine neue Thee- 

 Capside aus Java (Rhynch. : Hem. Heteropt.). — Treubia, 

 Batavia, i, no. 2, August 1919, pp. 73-81, 5 figs. 



A Capsid bug received in August 1918 from a tea estate near Soeka- 

 boemi, Java, is described as Hyalopeplus smaragdinus, sp. n., and 

 H. smaragdinus f. rubiniis, n., is described from a female received in 

 November 1918 from the neighbourhood of Buitenzorg. The 

 differences between this species and CalUcratides ramah, Kirby, which 

 occurs on tea in Ceylon and belongs to a genus wliich has been held 

 to be synonymous with Hyalopeplus by 0. M. Renter, are noted. A 

 note at the end of this paper states that another female recently 

 received appears to be H. vitripennis, Stal. 



During its entire development the bug lives in the flower-buds of 

 the tea plant, being found in young buds as well as in those about to 

 open. It bores with it proboscis into the closed perianth until the 

 point penetrates one of the pollen sacs, which is sucked out. The 

 tissue around the puncture is not discoloured and the injury seems 

 limited to a few anthers, so that the development of the bud should not 

 be prevented : this point, however, requires further investigation. In ' 

 captivity the bugs refused to feed on any other part of the j^lants, 

 even very tender tea-shoots being rejected. As tea is not native 



