Sphex

n.

1.

(Zool.) Any one of numerous species of sand wasps of the genus Sphex and allied genera. These wasps have the abdomen attached to the thorax by a slender pedicel. See Illust. of Sand wasp, under Sand. Sphex fly (Zool.) any one of numerous species of small dipterous flies of the genus Conops and allied genera. The form of the body is similar to that of a sphex.