The green June beetle [Cotinis nitida L.] . e average number of days before the first molt occurs wasdetermined to be 18. The minimum and maximum number of days 24 BULLETIN 891, U. S. DEPARTMENT OF AGEICULTURE. before the second molt occurred were 15 and 32, respectively, whilethe average number of days between the first and second molts was a larva hatched July 27 will molt the first time in 13 to 15days, or about August 11. The second molt will take place in about20 to 25 days, or approximately the first week in September; fromthe latter date until late in the following spring, a per
The green June beetle [Cotinis nitida L.] . e average number of days before the first molt occurs wasdetermined to be 18. The minimum and maximum number of days 24 BULLETIN 891, U. S. DEPARTMENT OF AGEICULTURE. before the second molt occurred were 15 and 32, respectively, whilethe average number of days between the first and second molts was a larva hatched July 27 will molt the first time in 13 to 15days, or about August 11. The second molt will take place in about20 to 25 days, or approximately the first week in September; fromthe latter date until late in the following spring, a period of nearly9 months, the larva grows, hibernates, and matures before it finallytransforms to pupa. PUPATION. When about to transform to pupa the larva constructs a cell bycementing particles of soil together. Several days after the cell isconstructed the last larval skin is cast, disclosing the pupa. Onopening the pupal cell the third or last molt of the larva may be <^^^^?^9? /^^^^/iijijrKc^i^^c^^^^/^^^. 5f/v:ocr7r At?/^ P£ Fig. 5.—Dlafertimmatic picture showing life history of green June beetle. (Walton del.) seen. The time required to change from larva to pupa in the cellvaries from 3 to 8 days, according to temperature. The pupal periodconsumes three weeks or more, also depending on temperature. Cocoons from which the adults have escaped are shown inPlate IV, B. SUMMARY OF THE LIFE CYCLE. The life history (fig. 5) of the green June beetle occupies only oneyear. Approximately four-fifths of this time is spent in the larvalform. The most active growing larval period occurs in the first 2months of its life, although 7 additional months are required in com-l^leting full growth. In tidewater Virginia the beetles appear about the middle of June,continue through the months of July and August, and disappear bythe first week of September. Eggs are deposited from the middle THE GREEN JUNE BEETLE. 25 of July and through the month of August in the soil at a depth of6
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashi, bookyear1922
