HYMENOPTERA. 89 
the complete history of another species, the larva ef which is 
similar. 
Others, in which the antennz also consist of nine joints, differ from 
the preceding in those of the males which are pectinated on one side. 
Cranvivs, Kliig, Lat.(1) 
Some others, with a short, thick body, like that of the Hylotome, 
and considered as such by Fabricius, have from ten to fourteen joints 
in the antenne, which are simple in both sexes. 
ATHALIA, Leach(2). 
The following species are remarkable for their antennz, which are» 
composed of sixteen joints at least, pectinated or flabelliform in the 
males, and serrated in the females. In this respect they lead us to 
the Megalodontes, the first subgenus of the ensuing subdivision. 
PreryGcopnHorus, Klug. 
Where the antennz have but a single range of teeth, and simply 
longer or pectinated in the males, and short and serrated in the 
females; here they are evidently enlarged at the extremity(3). 
Loruyrus, Lat. 
Where the antenne, in the males, have a double range of elongated 
teeth forming a large triangular panache, and are serrated in the 
females. 
To this subgenus I refer the first family of the Pterones of M. Ju- 
rine, as well as the first division of the Hylotomz of Fabricius. The 
larve or pseudo-caterpillars live in society, more particularly on the 
Pines. They are very injurious to the young plants(4). 
There, the labrum is concealed or but slightly salient. The inner 
side of the four posterior tibiz, anterior to its extremity, presents 
two spines, and frequently even a third above the preceding pair. 
(1) Lepel., Ibid., p. 57. 
(2) Lepel., Ibid., p. 21. In this genus, Dr Leach only comprises those spe- 
cies which are furnished with ten joints. Kliig arranges them among his Hm- 
phyti. 
(3) See Kliig, Leach and Lepeletier, Ibid. 
(4) Lepelet., Ibid., and the Monog. of this subgenus, published by Klug, in 
the Mem. Nat. Cur. of Berlin. 
Vout. 1V.—M 
