172 



ENTOMOLOGY. 



always wingless. The legs of the females are adapted for 

 burrowing, and not fitted for collecting pollen. 



FIG. 2W.Eciton mexicana; worker-minor. 



_ Family Mutillidae. Females wingless; in this as also in the three 

 following families the prothorax is produced behind, so that the hind- 

 er angles reach the tegulee. The intermediate tibiae have two apical 

 spurs. In this group, as well as in the Scoliidas, the first ventral 

 segment of the abdomen is distinctly separated from the second by 

 a more or less deep constriction. The Mutillids are usually scarlet 

 or scarlet and black, and the body is more or less hirsute; they sting 



J 



FIG. 220. Mutilla, female. FIG. 221. Myrmosa, male and wingless female. 



badly, and store their burrows in the sand with flies and other in- 

 sects. Mutilla ferrugata Fabr. (Fig. 220); Myrmosa unicolor Say 

 (Fig. 221). 



Family Scoliidse. The females are always winged, and the middle 

 tibia? have but one apical spur. The head is broad in front, the 

 eyes indented, while the female antennae differ from those of the 

 males in being short, thick, and elbowed. The species of Scolia 

 are black banded with yellow, and live as parasites in the grubs of 

 beetles. Tiphia inornata Say is a common black species. 



