. Bulletin. Agriculture. 14 BULLETIN 1107, U. S. DEPARTMENT OF AGEICULTUEE. mating occurs (PL III, Fig. 3) and the mothers lay tlieir egg^ in the wood to start a new generation. SEASONAL HISTORY. The lead-cable beetle has only one generation a year. Eggs have been found from May 7 to September 9, larvae from May 28 one year to June 20 the next year, pupse from March 4 to August 3, and adults from April 14 to September 27. The beetles are most common in July and August, the maximum emergence being from July 20 to 30, The pupse are most abundant from May 1 to June 15. A few pupse and young beetl
. Bulletin. Agriculture. 14 BULLETIN 1107, U. S. DEPARTMENT OF AGEICULTUEE. mating occurs (PL III, Fig. 3) and the mothers lay tlieir egg^ in the wood to start a new generation. SEASONAL HISTORY. The lead-cable beetle has only one generation a year. Eggs have been found from May 7 to September 9, larvae from May 28 one year to June 20 the next year, pupse from March 4 to August 3, and adults from April 14 to September 27. The beetles are most common in July and August, the maximum emergence being from July 20 to 30, The pupse are most abundant from May 1 to June 15. A few pupse and young beetles were found in their pupal cells in elm in November. Whether these were retarded individuals of the past sea- son's generation or greatly accelerated ones of the coming generation could not be determined. DESCRIPTION AND HABITS. The Egg.' Considerable time was spent and patience was necessary in locating and taking notes on the first egg. (Fig. 10.) After the position was found, numerous eggs were ruined in an effort to get them under the binocular, but after a number of attempts it was successfully accomplished. The eggs are very soft, the slightest touch puncturing them, while they quickly shrivel and dry when exposed. Description.âEgg elongate, about 15 times longer than broad; average length, including stem, milli- meters ; average width, millimeter. The end leav- ing the ovipositor first is rather bluntly pointed, while the end leaving the ovipositor last (or gallery end) has a slender stem attached to it about millimeter in length. The egg is somewhat the shape of that of LyctMS planicoUis Lee, described and figured by T. E, Snyder," yet does not bear any longitudinal striae. The color when first deposited is pale white, gradually changing to a dull white or cream, the surface being rather dull with a slight granular appearance. The larva occupies about two-fifths of the egg proper when developed, its mandibles showing through the transparent eggshel
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