Sphinx or Hawk Moths are typically large, and have the apex of the abdomen pointed. The wings are usually narrow, and the probocis well-developed and often quite long (as in the genus Manduca which feeds on deep flowers). Ocelli are lacking. The antennae typically are not thickest at either end, but somewhere in the middle.
The caterpillars are usually almost naked, with perhaps just a few sparse hairs. The presence of a horn on the larva of most species has led to another common name for the family, Hornworms. Pupation occurs in the soil or in leaf litter.
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American Insect site