Sphex (?), n.[NL., fr. Gr. ???,
???, a wasp.] (Zoöl.) 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 (Zoöl.), 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.