. Annual report of the Regents . Fig 12.~Pupa of Psylla, do: sal ^W Fig. 13. Pupa of the pear tree Psylla^ventral view. 328 Forty-sixth Report on the State Museum The mature insects made their appearance about June 15th, and com-menced to feed soon after emerging. They appear to secrete nohoney-dew. Within a week copulation ensued, and oviposition soonbegan. There were at least four broods during the year, at intervalsof about a month. The adults of the summer broods were the mostnumerous July 2()th, August 20th, and September 25th — the lastconstituting the hibernating form. This last-
. Annual report of the Regents . Fig 12.~Pupa of Psylla, do: sal ^W Fig. 13. Pupa of the pear tree Psylla^ventral view. 328 Forty-sixth Report on the State Museum The mature insects made their appearance about June 15th, and com-menced to feed soon after emerging. They appear to secrete nohoney-dew. Within a week copulation ensued, and oviposition soonbegan. There were at least four broods during the year, at intervalsof about a month. The adults of the summer broods were the mostnumerous July 2()th, August 20th, and September 25th — the lastconstituting the hibernating form. This last-named form varied so much from the preceding summerbroods, being one-third larger and of much darker colors, that theywere believed, at first, to be a different species. On careful comparisonwith descriptions of Psylla simulans Foerster, of Europe, it was foundto present so close a resemblance as to leave scarcely a doubt that had been described from the winter form of JP. pi/ricola, andthat the species is dimorphic, appearing in two distinct forms durin
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