562 



state, or because the larval borings have crossed the bases of the tissues 

 and either injured them directly or caused rot of the stem. If larvae 

 are numerous, they will weaken the trunk just below the heavy crown 

 so that it breaks off and the tree dies [R.A.E., A, ii, 57]. A mixture 

 of 1 oz. creosote with 1 oz. kerosene oil was injected into a burrow of an 

 infested palm and killed the larvae present. One part creosote to 

 three parts kerosene killed two out of three larvae. About 1 oz. of 

 the mixture was used in each case. 



In one district the blossoms of the palms were found to be infested 

 by the larvae of a small moth, Blastohasis ochrobathra, Meyr. Cyla& 

 formicarius, F., was found on sweet potatoes, and Diahrotica separata^ 

 Baly, on squash. 



Jarvis (H.). Fruit-fly Investigations. Fourth Progress Report.— 



Queensland Agric. JL, Brisbane, xviii, pt. 2, August 1922, 

 pp. 131-133. 



Further instances of the value of cold storage of fruit for the 

 destruction of eggs and young larvae of the fruit-fly, Dactis ferrugineus 

 {tryoni), are recorded [R.A.E, A, x, 522]. In apples submitted to a 

 temperature of 38° F. for seven weeks, all the larvae were killed 

 before material damage had been done. 



The red mite, Bryobta sp., was very numerous in the egg stage in 

 many orchards during the period under review, trees harbouring the 

 eggs looking as though painted with bands of light red. Although 

 not credited with doing much damage, these mites, if sufficiently 

 abundant, might have a serious effect on the trees. 



Dallimore (W.) & MuxRo (J. \\\). Additions to the Wild Fauna and 

 Flora of the Royal Botanic Gardens, Kew : xvi. Bark Beetles.— 



Bull. Misc. Inf., R. BoL Gdns., Kew, no. 6, 1922, pp. 189-193, 

 6 figs. 

 Phloeosimis thiijae, Ferris, is recorded apparently for the first time in 

 Britain. During 1921 it seriously affected the health of many trees at 

 Kew, including specimens of Thuja orient alis 40 to 50 j^ears old. 

 During July it was also found on Cupressus pisifera about half a mile 

 from the original infestation. The other species are Scolytus destructor, 

 01. (large elm bark-beetle), abundant in elms, especially during 1921 ; 

 S. multistriatus. Marsh, (small elm bark-beetle), found together with 

 S. destructor and Magdalis armigera, F. (elm bark weevil) ; S. pruni, 

 Ratz. (large fruit-tree bark-beetle), in Prunus laurocerasus, P. padus, 

 and a hawthorn log ; 5. intricatus, Ratz. (oak bark-beetle), common in 

 various oaks and sweet chestnut ; S. rugulosus, Ratz. (small fruit-tree 

 bark-beetle), common in various fruit trees and Prunus padus ; 

 Hylesinus fraxini, Panz. (ash bark-beetle), in Fraxinus and lilac 

 {Syringa vidgaris) ; H. vittatus, F., in elm with Magdalis armigera ; 

 Myelophilus piniperda, L. (pine-shoot beetle) ; Hylurgops palliatus, 

 Gyll. (brown pine beetle), in pine and spruce logs ; Hylastes ater, Payk. 

 (black pine beetle), in pine logs ; Dryocoetes villosus, F., in oak and 

 sweet chestnut ; Cryphalus fagi, F. (beech bark-beetle), in beech twigs 

 and branches ; C^ abietis, Ratz. (fir bark-beetle), in Abies spp. ; 

 Pityogenes bidentatus, Hbst., in Pinus spp. ; P. chalcographus, L., in 

 timber (undoubtedly an importation and not yet established) ; 

 Pityophthorus pubescens. Marsh., in pine twigs ; Xyleborus saxeseni, 

 Ratz., in cherry trees, oak, sweet chestnut, beech and in a Catalpa log ; 

 and Trypodendron domesticum, L., in oak and beech logs. 



