Half hours with insects . Parasite of Potato Beetle. of the farmer, he might well despair. The only insect as yet known to live parasitically on the potato beetle is the Lydella (Fig. 155, enlarged), described by Mr. Riley under the name Fig. 15G. Fig. 157. Fig. 158. Fio. S-bandedLady Bird. 9-spottcd Lady Bird. Ilippodamia. Chilocorus. of Lydella dorypJiorce. He remarks that this fly destroyedfully ten per cent, of the second brood and fifty per cent, ofthe third brood of potato beetles that were in my garden. Of the external enemies the lady birds are among themost efficient. (Fig. 156,
Half hours with insects . Parasite of Potato Beetle. of the farmer, he might well despair. The only insect as yet known to live parasitically on the potato beetle is the Lydella (Fig. 155, enlarged), described by Mr. Riley under the name Fig. 15G. Fig. 157. Fig. 158. Fio. S-bandedLady Bird. 9-spottcd Lady Bird. Ilippodamia. Chilocorus. of Lydella dorypJiorce. He remarks that this fly destroyedfully ten per cent, of the second brood and fifty per cent, ofthe third brood of potato beetles that were in my garden. Of the external enemies the lady birds are among themost efficient. (Fig. 156, Coccinella trifasciata; Fig. 157,Coccinella 0-notata, all slightly enlarged; Fig. 158, Hippo-u 17 210 HALF HOURS WITH IN^SECTS. [Packard. damia convergens; a, larva; 6, pupa; c, beetle, natural size ;and Fig. 159, Chilocorus.) These lady birds destroy theeggs and young grubs, and at times have been so efficientas to save to farmers a large proportion of their crops. Onthe opposite page are figures of different bugs and beetleswhich also prey upon the potato beetle, rendering the mostefficient service. Of the bugs (Hemiptera) the first twofigures* represent certain common forms said by Mr. Rileyand others to prey at times voraciously both upon the larvaand beetle itself
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectinsects, bookyear1881
