517 



conditions existing in Michigan, Various formulae are discussed and 

 directions for making home-made solutions are given with a table of 

 dilutions for concentrated hme-sulphur wash. A comparison is made 

 between dusting and spraying in orchards, the former procedure 

 being considered to be still in the experimental stage. 



Ckespo (M. a.). Dominio del jGorgojo 6 Piche de la Batata {Cylas 

 formicarius). [Economic Importance of the Sweet Potato Weevil.] 

 — Rev. Agricultura, Santo Domingo, R.D., xv, no. 5, 31st August 

 1919, pp. 152-157, 2 figs. 



In the Dominican Republic, Cylas formicarius (sweet potato weevil) 

 is responsible for the loss of some 60 to 90 per cent, of the sweet potato 

 crop, many fields having been abandoned owing to its depredations. 

 Sweet potatoes and related native plants only are attacked, the eggs 

 being laid on the roots. The larvae upon hatching penetrate into 

 the tubers, giving them an unpleasant taste, so that even pigs refuse 

 to eat them. A description of the insect is given, with its distribution 

 and the usual remedial measures. Late varieties have proved on the 

 whole more resistant than early ones. It is considered that quarantine 

 laws should be passed with a view to Hmiting the spread of the insect, 

 and the importance of co-operation in carrying out remedial measures 

 is emphasised. 



Woodkuffe-Peacock (B. A.). Two Phytophagous Chalcids. — 

 Naturalist, London, no. 753, October 1919, pp. 329-330. 



A Chalcid provisionally identified as Syntomaspis druparum, Boh., 

 and previously erroneously recorded as Tomyrus elegans, was found 

 emerging from seeds of Crataegus oxyacantha (hawthorn), which had 

 passed through the ahmentary canal of a blackbird and were kept 

 in a tube from 30th March to 29th June, when the adult appeared. 

 This species is phytophagous and also feeds on seeds of apples. The 

 larvae were found by the author in March 1918 in seeds of Pyrus 

 syJvestris (acerba) in fruits that showed no external opening. Another 

 phytophagous Chalcid was found in tubes containing seeds of rough 

 chervil {Chaerophyllum temulum). 



Champion (H. G.). A Cerambycid infesting Pine Cones in India, 



Chlorophorus strohilicola, n. sp. — Entomologist'' s Mthly. Mag., 

 London, no. 58, October 1919, pp. 219-224, 2 plates, 1 fig. 



The different stages of Chlorophorus strohilicola, sp. n., are described. 

 The eggs of this Cerambycid are laid at the end of June and beginning 

 of July in the crevices between the scales of the full-sized green cones 

 of Pinus longifolia, usually on trees about 15 months old. The shaded 

 concave side of the cone is chosen and about 15 to 20 eggs deposited 

 in each. These hatch in about two weeks and the young larvae bore 

 immediately into the cone feeding on the internal wood tissues but 

 avoiding the strongly lignified vascular tracts. Infested cones are usually 

 broken off by the wind, but the fall does not injure the larvae and they 

 complete their metamor^^ rsis inside the fallen cone. Badly infested 

 cones are easily recognised by their arrested development. Should 

 only a few larvae be present in the cone, development is not hindered^ 



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