127 



is N. (E.) morio, Latr., which constructs large oval-shaped termitaria, 

 about U to 2 ft. in diameter, in trees or on fence posts, generally 

 on Poinciana regia, and frequently on avocado pear and mango trees. 

 The formation of a colony and' the individuals comprising it are 

 described. Houses made of wood are also infested by it. The best 

 method of destro^ang a colony is to place a poison, such as calomel, 

 white arsenic or Paris green, in a hole made in the termitarium. 

 Poultry are of great service in devouring these termites in the open. 

 The" most important and most destructive species is Cryptoiermes 

 brevis, Wlk. It usually attacks furniture and houses, the only sign 

 of its presence being little holes surrounded sometimes by small particles 

 of excrement, though the wood may be so badly infested as to be 

 quite rotten. The constitution of the colony is described. White 

 pine and oak are chiefly attacked, mahogany and other hard woods, 

 such as California redwood, being much more resistant. It is difficult 

 to kill this termite without damaging the infested wood. Carbon 

 bisulphide may be injected into the galleries and the openings stopped 

 up. If papers or fabric in drawers or trunks require to be protected, 

 a Httle paradichlorobenzine will repel the insects and will kill those 

 within, as well as Psocids, ants or cockroaches. W^ien the timber 

 of a building is infested, the only effective remedy is to fumigate the 

 whole building with hydrocyanic acid gas. Many of the insects can 

 be killed by pouring paraffin into the galleries, while badly-infested 

 pieces of wood should be removed and replaced by sound ones. Wood 

 impregnated with creosote is permanently protected from attack ; 

 impregnation with a 1 per cent, solution of corrosive sublimate or with 

 chlorinated naphthaline also renders wood immune, provided it is in 

 a dry place, but as these substances are soluble in water, a moist 

 atmosphere destroys their efficacy. 



Nilssox-Ehle (H.). TJber Resistenz gegen Hetcrodera schachtii bei 

 gewissen Gerstensorten, ihre Vererbungsweise und Bedeutung Kir 

 die Praxis. [On the Resistance of certain Varieties of Barley to 

 Heferodera schachtii ; its hereditary Character and practical 

 Significance.] — Hereditas, Lund, i, pt. 1, 1920, pp. 1-34, 4 figs. 



Certain varieties of barley appear to be immune from the attacks 

 of Heterodcra schachtii, and this character is hereditary. It is possible 

 to combine the desired quafities of non-immune varieties with those 

 of the immune ones by crossing them. 



Although barley itself is not greatly damaged by the attacks of 

 H. schachtii, it is advisable to grow immune varieties in order to 

 protect wheat and oats following it on the same ground. The crossing 

 experiments are described in detail. 



v.\N Heurn (W. C). Waarnemingen betreffende een Parasiet van 

 het Cacao-Motje. [Observations on a Parasite of the Cacao 

 Moth.] — Ent. Her. Ned. Ent. Vereen., The Hague, vi, no. 122, 

 1st November 1921, pp. 26-27. [Received 11th January 1922.] 



The parasite of the cacao moth, Acrocercops cyamerella, Sn., found 

 in Java by Dr. Roepke, and denominated "C " [R.A.E., A, i, 57], 

 proves to be an Ichneumonid of the genus MesQ^temis. Another 

 host of this parasite available at the period when there are no pods 

 on the cacao trees was found by Dr. Dammerman to be the coconut 

 Zygaenid, Brachartona catoxantha, Hmps. In 1921 there were bred 



