Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomolo00smit Year: 1906 204 AN- ECONOMIC ENTOMOLOGY. seen hundreds ol them tiying about among half a dozen plum- trees, apparently injuring nothing but possibly themselves. Their larva-, however, feed on grass roots and arc often trouble- some on lawns. They are quite large creatures and very hairy, with a fashion of travelling on the back instead of the legs, when remo\ed from their congenial soil. Heavy top-dressings of kainit and tobacco have proved about as
Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomolo00smit Year: 1906 204 AN- ECONOMIC ENTOMOLOGY. seen hundreds ol them tiying about among half a dozen plum- trees, apparently injuring nothing but possibly themselves. Their larva-, however, feed on grass roots and arc often trouble- some on lawns. They are quite large creatures and very hairy, with a fashion of travelling on the back instead of the legs, when remo\ed from their congenial soil. Heavy top-dressings of kainit and tobacco have proved about as effective as anything in dealing with these insects, though on a small scale the kerosene emulsion diluted ten times, and then washed into the soil by rain or frequent waterings, has proved effective. On any large area Fig. 194. AUurhina ititida.—a, larva ; b, pupa; c, adult; d , structural details of larva. this process would probably be too expensive. The species is more common southward, and is more likely to become trouble- some on lawns, in parks, and in gardens than in the field. To this same group belongs the 'Indian Cetonia,'^/c/>//fr/a inda, which is one of the earliest of our Eastern beetles, flying in April or May over sandy or bare spots, close to the ground. At this time it is sometimes found on flowers, but remains only a few days. In early September a new brood appears, and this is occasionally troublesome, the beetles eating into ripe fruits or into corn. They have never yet appeared in such numbers, however, as to make remedial measures necessary. Taken as a whole, the Lamellicorns contain no direcdy bene- ficial insects, and the white-grub larvae are in many cases injurious when they feed on the roots of cultivated plants. Where a variety of cultivated crops follow each other, there is little chance for their excessive development, and frequent rotation is there- fore indicated, with as short a period in grass as may be. As
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