124 INSECTA. 
In the others, the antenne are inserted near the middle of the face 
of the head, which is larger than in the preceding Insects; the abdo- 
men is sometimes conical, and sometimes ovoidal or elliptical. 
They form the genus 
MuTILLa, proper. 
These Insects are found in hot and sandy localities. The female 
runs with great quickness, and is always seen on the ground. The 
males frequently alight on flowers, but their mode of life is unknown. 
The species, in the females of which the thorax is almost cubital, 
and without knots or appearance of divisions above, compose the 
genera ApreroGyna(1), PsammMotuerma, and Mutixua of Latreille. 
The abdomen of the Apterogyne has the two first annuli in the 
form of knots, as in several Formicze. The antennz of the males 
are long, slender and setaceous. Their superior wings only present 
brachial or basilary cells, and a single, small, rhomboidal, cubital 
cell. In the Psammothermz(2) and the Mutillz there are three, 
with two recurrent nervures. Besides this, the second segment of 
the abdomen is much larger than the preceding one, and forms no 
knot. The antennz of the male Psammotherme are pectinated, and 
those of the Mutillz simple in both sexes. 
M. europxa, L.3; M. tricolore, Coqueb., Ilust. Icon. Insect., 
dec. II, xvi, 8. The female is black, with a red thorax and 
- three white bands on the abdomen; the two last approximated. 
She is provided with a powerful sting. The male is bluish 
black with a red thorax and the abdomen as in the female(3). 
Those species, which, in both sexes, have the thorax equal above 
but divided into two distinct segments, with the abdomen conical in 
the females and elliptical and depressed in the males, compose the 
genus 
Myrmnosa, Lat. Jur.(4) 
Those, in which the thorax of the females is still oval above, but 
(1) Lat., Gen. Crust. et Insect., IV, p. 121. See the Dict. Class. d’Hist. Nat.; 
Dalm., Anal. Entom., 100, where he gives the figure of the Scolia globularis, Fab., 
the male of another species of Apterogyna. 
(2) Mutilla flabellata, Fab.; the late M. Delalande brought a species of this 
genus from the Cape of Good Hope. 
(8) Ibid.; Oliv., Encyc. Méthod., article Mutille; and Kliig, Entom. Brazil. 
Specim. 
(4) Lat., Ibid., p. 119, and Jurine on the Hymenoptera. 
