238 INSECTA. 
The remaining Heterogyna are solitary Insects. Each species is 
composed of but two kinds of individuals, winged males and apte- 
rous females; the latter are) always armed with a powerful sting. 
The antenne are filiform or setaceous, and vibratile; their first and 
third joints are elongated, and the length of the first is never equal to 
the third of the total length of the whole organ. 
They form the genus 
Moritta, Lin.* 
In some species, of which the males only have been observed, the 
antenne are inserted near the mouth, the head is small, and the ab- 
domen long and almost cylindrical, as in 
Doryuvus, Fab. 
Insects peculiar to Africa and India ft. 
Lapipus, Jur. 
Hymenoptera of South America, differing from the Doryli in their 
mandibles, which are shorter and narrower, and in their maxillary 
palpi, that are at least as long as those of the labium, and composed 
at least of four joints; in Dorylus, they are very small and at most 
biarticulated tf. 
In the others, the antennz 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 
MorTI11a, 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 we. 
nera Aprerocyna §, Psammoruerma, and Murira of Latreille. 
The abdomen of the Apterogyne has the two first annuli in the form 
of knots, as in several Formic. The antennee of the males are long 
slender, and setaceous. Their superior wings only present eachial 
or basilary cells, and a single, small, rhomboidal, cubital cell. In the 
Psammotherme || and the Mutillz there are three, with two recur- 
rent nervures. Besides this, the second segment of the abdomen is 
much larger than the preceding one, and forms no knot. The an- 
tenn of the male Psammotherme are pectinated, and those of the 
Mutille simple in both sexes. 
pp sek ote! teen eed ey hal oe oe Se 
* Tribe of the MuTILLAKIZ, Lat., Fam. Nat. dn Régne Animal, 452. 
++ See Fabricius ; and Lat., Gen. Crust. et Insect., IV, p. 123. 
+ See Jurine and Lat., Ibid. 
§ Lat., Gen. Crust. et Insect., [V, p. 121. See the Dict. Class. d’Hist. Nat. ; 
Dalm., Anal. Entom., 100, where he gives the figure of the Scolia glob : 
the male of another species of Apterogyna. ta globularis, Fab.; 
|| Mutilla flabellata, Fab.; the late M. Delalande brought a speci . 
from the Cape of Good Hope. 6 pecies of this genus 
