grandfather longlegs
Webster's Dictionary (GCIDE)
Grandfather \Grand"fa"ther\, n. A father's or mother's father; an ancestor immediately after the father or mother in lineal ascent. [1913 Webster]
Grandfather longlegs. (Zool.) See Daddy longlegs. [1913 Webster]
Daddy longlegs \Dad"dy long"legs`\
1.(Zool.) An arachnidan of the genus Phalangium, and allied genera, having a small body and four pairs of long legs; -- called also harvestman, carter, and grandfather longlegs. [1913 Webster]
2.(Zool.) A name applied to many species of dipterous insects of the genus Tipula, and allied genera, with slender bodies, and very long, slender legs; the crane fly; -- called also father longlegs. [1913 Webster]