90 F INSECTA. 
The antennz are always multiarticulated, the head is large, square, 
placed on a little neck, and has strongly crossed mandibles. They 
appear in spring. 
The larve of the greater number are destitute of membranous feet, 
and inhabit silken nests of their own spinning, formed round the 
leaves of various trees. 
They constitute the genus Cephaleta of Juvine, which has been 
divided into two. 
MeEGALoponTEs, Lat.—ZTarpa, Fab. 
Where the antennz are serrated or pectiniform(1). 
Pampuitius, Lat.—Lyda, Fab. 
Where those organs are simple in both sexes. 
Their larve are destitute of membranous feet, and the posterior 
extremity of their body is terminated by two horns. They feed on 
leaves, which they frequently double in order to remain concealed(2). 
In the last of the Tenthredinetz, the ovipositor is prolonged be- 
yond its groove and projects posteriorly. The inner extremity of 
the two anterior tibiz presents distinctly but a single spine, curved 
and terminated by two teeth. The antenne are always composed 
of a great number of simple joints. 
Xyexa, Dalm.—Pinicola, Bréb.—Mastigocerus, Kliig. 
The Xyelz are very distinct by their geniculate antenne forming 
a sort of whip, that are abruptly attenuated near their extremity, 
and consist of eleven joints, the third of which is very long; as well 
as by their very long and equally flagelliform maxillary palpi. The 
thick or callous point of the superior wings is replaced by a cell. 
The laminz of the ovipositor are smooth and entire. 
The larve inhabit the interior of plants or old wood(3). 
(1) See the preceding works, and the Entom. Monog., Klug, p. 183. 
(2) Ibid. Encyc. Méthod., article Parphilie, and the Monograph of the genus 
Lyda of Kliig, in the Mem. Nat. Cur. of Berlin. See also the Monograph of M. 
Lepeletier. 
(3) See Dalm., Anal. Entom., p. 27. The number of joints is the same as in 
the preceding Insects, and in this respect, that naturalist is mistaken. See also 
the Nouv. Dict. d’Hist. Nat., 2d edit., article Pinicole, and the Monograph of 
the Tenthredinite of M. Lepeletier. 
