. Manual of vegetable-garden insects. yellow, marked with three blaekspots arranged in a triangle (). The inseet hibernates as abeetle in sheltered places. The earlystages have not been described. The Larger Striped Flea-Beetle Disonycha crenicollis SayFig. 209. — Tlie tlucc-spotted , . • i tt • i flea-beetle (X 5). ihis species occurs ni the United States east of the Rocky Mountains,ranging from New York to Nebraska and south to beetle is abaut -j inch inlength, yellow, with two blackspots on the prothorax andhas each wing-cover markedwith a narrow marginal andsutural, and a
. Manual of vegetable-garden insects. yellow, marked with three blaekspots arranged in a triangle (). The inseet hibernates as abeetle in sheltered places. The earlystages have not been described. The Larger Striped Flea-Beetle Disonycha crenicollis SayFig. 209. — Tlie tlucc-spotted , . • i tt • i flea-beetle (X 5). ihis species occurs ni the United States east of the Rocky Mountains,ranging from New York to Nebraska and south to beetle is abaut -j inch inlength, yellow, with two blackspots on the prothorax andhas each wing-cover markedwith a narrow marginal andsutural, and a brt)ader medianblack stripe (Fig. 210). Ithas been found on beet, melonand strawberry in Illinois. Ithibernates in the adult con-dition and the early stages ^^ ^m t-i i * ? ^a •^ ^ Fig. 210. — The larger striped nea- are unknown. beetle (x 41).. The Sweet Potato Flea-Beetle Chcetocnema confinis Crotch Although this flea-beetle is widely distributed throughoutthe United States east of the Rocky Mountains and has alsobeen taken in California, it has attracted most attention byits injuries to the sweet potato in New Jersey. In some local-itie;s and in certain seasons, it has proved itself the most im- FLEA-BEETLES 333 portant insect enemy of that crop. It has been observed feed-ing on sugar-beet, corn, wheat, oats, timothy, blue-grass, buck-wheat, red clover, raspberry and box elder. The beetle is about ts inch in length, pitchy black with a faintbronzy reflection. The antennae and legs, except the hindfemora, are reddish yellow (Fig. 211). The winter is passedby the beetles in rubbish, especially along hedgerows andwoodlots. In New Jersey they appear on the sweet potatoplants as soon as transplanted in May. They do not eat holesthrough the leaves but eat out grooves or channels in theupper surface, usually beginning alongthe mu
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
