HYMENOPTERA. 123 
maxille consist at least of six joints. The head of the neuters is 
usually very large. 
Atta cephalotes, Fab.; Fourmi de visite, Lat., Ibid., ix, 57. 
CryrtTocerus, Lat. 
Always provided with a sting, and the abdominal pedicle formed 
of two knots; but the head, very large and flattened, has a groove on 
each side for the reception of a portion of the antenne. 
The species are peculiar to South America(1). 
The remaining Heterogyna are solitary Insects. Each 
species is composed of but two kinds of individuals, winged 
males and apterous females; the latter are always armed with 
a powerful sting. The antenne are filiform or setaceous, and 
vibratile 5 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 
Moutixua, Lin.(2) 
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 
Dorytus, Fab. 
Insects peculiar to Africa and India(3). 
Lagipus, Jur. 
Hymenoptera of South America, differing from the Doryli in 
their mandibles, which are shorter and narrower, and in their max- 
illary palpi, that are at least as long as those of the labium, and com- 
posed at least of four joints; in Dorylus, they are very small and at 
most biarticulated(4). 
(1) See Lat., Hist. Nat. des Fourmis; Gen. Crust. et Insect., IV, p. 124; Huber, 
Recherches sur les Fourmis Indigénes; Fabricius, &c. 
(2) Tribe of the Motrrtanr#, Lat., Fam. Nat. du Régne Animal, 452. 
(3) See Fabricius; and Lat., Gen. Crust. et Insect., IV, p. 123. 
(4) See Jurine and Lat., Ibid. 
