. Bulletin of the Department of Agriculture. Agriculture. THE CHEERY LEAF-BEETLE. black. Head red, coarsely punctured, without median depression, frontal tubercles smooth. Thorax nearly twice as wide as long, narrower in front, sides arcuate, or obtusely subangulate, hind angles distinct, base on each side obliquely sinuate, disc feebly convex, a broad depression each side and another along the middle, surface coarsely punctured, more densely in the depressions; scutellum red; elytra broader behind the middle, sides arcuate, margin explanate, humeri distinct, but rounded; sutural angle we
. Bulletin of the Department of Agriculture. Agriculture. THE CHEERY LEAF-BEETLE. black. Head red, coarsely punctured, without median depression, frontal tubercles smooth. Thorax nearly twice as wide as long, narrower in front, sides arcuate, or obtusely subangulate, hind angles distinct, base on each side obliquely sinuate, disc feebly convex, a broad depression each side and another along the middle, surface coarsely punctured, more densely in the depressions; scutellum red; elytra broader behind the middle, sides arcuate, margin explanate, humeri distinct, but rounded; sutural angle well marked, but obtuse; disc with coarse and deep punctures not crowded, less deep near the apex, interspaces smooth, shining. Body beneath red, the metasternum often piceous, sparsely finely punctate and finely pubescent. Legs variable in color entirely red to almost entirely piceous. Length . inch; mm. Male.—Claws finely bifid at apex. Last ventral segment broadly emarginate at apex, with a deep triangular depression limited by a sharply elevated Line. Female.—Claws more deeply bifid, the parts more divergent. Last ventral segment with a very slight emargination, in front of which is a slight fovea. The middle coxae are absolutely contiguous, the mesosternum is not prolonged between them, except as to the color of the legs no variation has been observed in this species. LIFE HISTORY. In the life-history work data were ob- tained on nearly 600 individuals, almost half of which were carried through their entire development from hatching to emergence of the adult insect. Daily observations were made and recorded, so that all transformations were noted within 24 hours of their occurrence. It should be noted that the period— August and the first half of September— covered by these observations was one of unusually low temperature and high humidity for the season. In August there was at Erie, 16 miles west of North East, an average daily deficiency in temperatu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
