The little that is known of their natural history is almost limited to an account given by Giraud of the habits of _Ceramius lusitanicus_, of which species he found a colony near Briançon. The Insect makes nests in the earth; they are entered by means of a chimney-like passage analogous to what is formed by certain _Odynerus_; the gallery when completed is about six centimetres long, and at its extremity is an earthen cell in which the larva lives; this is fed by the mother, who brings to it from time to time a supply of a paste, described as being somewhat like dried honey. The growth of the larva is believed to be rapid. [Illustration: Fig. 36—Cells constructed by _Coelonites abbreviatus_. (After André.)] Some fragmentary observations made by Lichtenstein on _Coelonites abbreviatus_ have also been recorded. This species, near Montpellier, constructs earthen cells; they are not, however, subterranean, but are placed side by side on the dry stems of plants (Fig. 36); these cells are stored with a material similar to that supplied by _Ceramius lusitanicus_ to its young. {90}CHAPTER III HYMENOPTERA ACULEATA _CONTINUED_—DIVISION III. FOSSORES OR FOSSORIAL SOLITARY WASPS—FAMILY SCOLIIDAE OR SUBTERRANEAN FOSSORS—FAMILY POMPILIDAE OR RUNNERS—FAMILY SPHEGIDAE OR PERFECT-STINGERS DIVISION III. FOSSORES. _Aculeate Hymenoptera, in which the abdomen, though very diverse in form, does not bear prominences on the upper aspect of the basal segments; front wing without longitudinal fold along the middle; hairs of body not plumose. Only two forms (male and female) of each species._