. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE MAIZE BILLBUG. 21 Elytra Jittle wider than the thorax; stritt usually deep aud well defined, distinctly closely punctate; intervals with first, third and fifth elevated, with two or more series of rows of fine punctulation; first or sutural with basal third triseriately. posterior two-thirds biseriately punctulate; third widest and most elevated, with four or five rows of fine punctulations; fifth biseriately punctulate; seventh little or not at all more elevated than the remaining inter- vals; intervals 2, 4
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE MAIZE BILLBUG. 21 Elytra Jittle wider than the thorax; stritt usually deep aud well defined, distinctly closely punctate; intervals with first, third and fifth elevated, with two or more series of rows of fine punctulation; first or sutural with basal third triseriately. posterior two-thirds biseriately punctulate; third widest and most elevated, with four or five rows of fine punctulations; fifth biseriately punctulate; seventh little or not at all more elevated than the remaining inter- vals; intervals 2, 4, G, 8, as also 7, more coarsely and closely uniseriately punctu- late. Pygidium deeply, coarsely and rather sparsely punctate, with sparse golden yellow hairs proceeding from the punctures and forming a short tuft each side, frequently abraded. Lower surface coarsely and rather densely punctate, scarcely less strongly at the middle than at the sides, punctures largest at the middle of the meta- thorax. Punctures of the metepisterna (side pieces) more or less confluent. Second, third and fourth abdominal segments nearly uniformly punctured throughout, like the legs. $.—First abdominal segment very con- cave; pygidium truncate at apex. $.—First ventral scarcely different; pygid- ium narrowed and rounded at apex. Aside from the differently shaped pj'gidium and the slightly shorter and less compressed rostrum there is little difference between the sexes. Length. 10-15 nun., width, nun. The adults begin to issue about the middle of August and continue to do so until the middle of September. Some of them leave the pupal cell, but most of them remain there for hibernation. The adults that leave the pupal cell in the late summer disappear; continued search in every situation until Decem- ber failed to reveal a single individual. It is evident that they left the cornfield in which they developed, and it is very probable that they found their way to some dense, coarse grass
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