519 



Approximately 3,000 eggs of a butterfly related to Lampides 

 {Polyommatus) haetica, which damages the flowers and seeds of sann 

 hemp, cowpeas, etc., were shipped, but did not yield an egg-parasite. 

 A small consignment of an Ichneumonid wasp that parasitises the larvae 

 was liberated, as well as some Odynerns, one species of which stores its 

 nest with Lycaenid caterpillars. Woolly aphis {Oregma) on sugar- 

 cane and bamboo was found to be attacked by the larva of a small moth. 

 Three speceis of Sphegid wasps that prey on mole-crickets {Gryllotalpa) 

 and field-crickets (Gryllus) have been released in Honolulu. Onites 

 phartopus, Catharsius niolossus and Onthophagus sp., enemies of the 

 horn fly [Lyperosia] were shipped, but only a few of the latter beetle 

 matured and were liberated. A Phihppine Histerid beetle occasionally 

 found under manure was shown to devour fly larvae. 



A study was made of enemies of the seeds of Tephrosia Candida and 

 Leucaena glauca. The larva of a small moth {Bactra sp.) and a small 

 weevil are being tested in quarantine on some agricultural plants that 

 they might injure if liberated. These insects weaken or destroy nut- 

 grass {Cyperus rotundus) in the Philippines. A parasitic Hymenopteron 

 and a small Tachinid prey on the moth, and the beetle is occasionally 

 killed by the larva of a Chalcid. 



Of sugar-cane pests, Mecistocenis sp. was found and also larvae of 

 Pyralids, Noctuids and Tortricids, especially the first-named. The 

 sugar-cane aphis [Aphis sacchari] was not plentiful, but a woolly 

 aphis {Oregma lanigera) was abundant, though scarcely harmful, as 

 well as Pseudococcus sacchari. 



Metalnikow (S.). Une Epizootie chez les Chenilles de Galleria mel- 

 lonclla.— C. R. Hebdom. Acad. Sci., Paris, clxxv, no. 1, 3rd July 

 1922, pp. 68-70. 



An elongated rod-shaped organism has been isolated from larvae of 

 Galleria mellonella that had succumbed to disease. Subsequent cultures 

 of these organisms ingested by healthy larvae also proved fatal. 



The study of this organism is being continued with the view to the 

 possibility of using it for the control of G. mellonella and other- noxious 

 insects. 



Thompson (W. R.). Theorie de I'Action des Parasites entomophages. 

 Accroissement de la Proportion d'Hotes parasites dans le Parasitisme 

 eyelique. — C. R. Hebdom. Acad. Set., Paris, clxxv, no. 1, 3rd 

 July 1922, pp. 65-68. 



The question of the proportionate reproduction of parasites and their 

 hosts [R.A.E., A, x, 386J is further discussed, and it is pointed out that 

 the apparent ineffectiveness of a given parasite attacking a given host 

 may be explained by the slow dispersal of certain parasites ; in such 

 cases, given sufficient time, its ultimate success may be expected. 



DupoRT (L.). Rapport sur les Travaux poursuivis a la Station [Entomo- 

 logique de Cho-Ganh] en mars, avril et mai 1922. — Supplement to 

 Bull. 135, Chambre d'Agric. Tonkin & Nord-Annam, Hanoi, 

 no. 16, 1922, 5 pp. [Received 18th August 1922.] 



The production of the Braconid, Doryctes strioliger, Kieff., has 

 been more than double that of 1921 [R.A.E., A, x, 437], and is still 

 increasing, so that this year the value of this parasite against the coffee 



