241 



D'inoderus bifoceolatus, WolL, attackes all bamboos except the 

 giant bamboo ; it is also a grain beetle and attacks flour. The Tene- 

 brionid, Rhizopertha dominica, F., and Triholium castaneum, Hbst., 

 attack lentils ; Calandra oryzae attacks rice and maize ; Diocalmuira 

 fnuiieHti, F. {Calandra sligniaticollis, Gyll.) occurs on green coconut 

 stems. No control has yet been attempted of these grain beetles, but 

 treatment by carbon bisulphide has been advised. A list of the scale- 

 insects occurring in the Island is given [see this Review, Ser. A, v, p. 4]. 



Gibson (H.). Spraying in the Home Garden. — Canadian Hortienllnrist 

 and Beekeeper, Toronto, xxv, no. 3, March 1917, pp. 73-74, 1 fig. 



This article gives instructions in a popular form for spraying against 

 insects pests most commonly met with in gardens and orchards, such 

 as San Jose scale [Aspidiotus perniciosus], oyster-shell scale [Lepido- 

 saphes idmi], codling moth [Ci/dia pomonella]. Aphids, and tent 

 caterpillars [Ma lacosoma]. 



Walton (W. R.). Grasshopper Control in Relation to Cereal and 

 Forage Crops. — U.S. Dept. Agric, W ashinqtcn , Z).('., Farmers' 

 Bull. no. 747, October 1916. 20 pp., 21 figs. [Received 12th April 

 1917.] 



The grasshoppers dealt with in this bulletin include MeJanophis 

 differentialis, Thom. : M. bivittatus, Say ; M. allantis, Riley ; 

 M.femiir-rubrum, De G. ; M. devastator, Scudd. ; Dissosteira Carolina, L. ; 

 D. longipennis, Thom. ; Camnula pellucida, Scudd. ; Brachystola 

 magna, Gir.; and Dictyophorus reiicidatas, Thunb. Insect enemies of 

 these species include the fly, Sarcophaga kellyi, which deposits living 

 maggots on the wings of the grasshoppers while they are in flight. 

 The robber fly, Proniachus rertebratus, attacks the adult grasshoppers, 

 and the digger wasp, Priononyx atratus, provisions its nest with them. 

 Certain blister beetles attack the eggs of grasshoppers, but are them- 

 selves injurious insects. Wild birds play quite an important part in 

 the natural control of grasshoppers. 



Control measures include destruction of the eggs, trapping the 

 insects and poisoning them with bait. The eggs are often very difficult 

 of access, but where practicable, ploughing, disking and harrowing 

 in autmnn prevent the eggs from hatching in the spring. The most 

 usual form of mechanical trap is the hopperdozer, of which two different 

 models are described in this bulletin. The most effectual control yet 

 devised is a poison-bait, consisting of poisoned bran-mash or a modi- 

 fied Criddle mixture. In semi-arid climates the baits should be applied 

 during the late afternoon, before the insects ascend the plants for the 

 night, and should be used with additional moisture. In moist climates 

 the early morning is the best time for application. 



Newcomek (E. J.). The Dock False-worm: an Apple Pest. — U.S. 



Dept. Agric., Washington, B.C., Bulletin 265, 29t"h December 

 1916, 40 pp., 6 figs., 25 tables. [Received 12th April 1917.] 



The dock false- worm, the larva of the sawfly Taxonus {Ametastegia) 

 glabratus, Fall., which is found all over Europe and in Canada and the 



