'Pompilus formosus' definitions:

Definition of 'Pompilus formosus'

From: GCIDE

Tarantula \Ta*ran"tu*la\, n.; pl. E. Tarantulas, L. Tarantulae. [NL., fr. It. tarantola, fr. L. Tarentum, now Taranto, in the south of Italy.] (Zool.) Any one of several species of large spiders, popularly supposed to be very venomous, especially the European species (Tarantula apuliae). The tarantulas of Texas and adjacent countries are large species of Mygale. [Written also tarentula.] [1913 Webster]
Tarantula killer, a very large wasp (Pompilus formosus), which captures the Texan tarantula (Mygale Hentzii) and places it in its nest as food for its young, after paralyzing it by a sting. [1913 Webster]