CLASS V. INSECTA. 
273 
antenna thicker towards their extremities, the first joint very long, 
more so in the females and neuters : lahrum large, perpendicular, 
corneous. 
These insects live in societies consisting of vast numbers. The 
males and the females are furnished with wings, the neuters being 
apterous. 
Huber lias written a work on the {economy of these animals. 
Genus 440 . FORMICA of authors. Lasius. Fabr. 
Peduncle of the abdomen formed of one simple scale : sting not puncto- 
rious : poisonous glands in the female and neuters ; antenna inserted 
in the front. 
Sp. 1. For. herculanea. 
Formica herculanea. Latr., Leach. 
Inhabits woods, building a large nest with bits of sticks. 
Fain. X. Muhllad.s. Leach. 
■Motillabis. Latreille. 
Head large : abdomen somewhat conic or ovoid : tibia spinose : maxil- 
lary palpi as long or longer than the maxillae : antenna filiform, in- 
serted in the middle of the face, longer than the head, the first 
joint not receiving the second ; superior icings with three submar- 
ginal cells. 
The insects of this family are solitary. The males arc winged, 
the females apterous, and there are no neuters. 
Genus 441. MUTILLA. Linn., Fabr., Pans:., Jurats, Illig., Spi- 
nolu, Leach. Siuu.x. De Geer. Apis. Christus, Harris. 
Abdomen (of both sexes) ovoid and convex; the second segment large, 
somewhat campanulated : thorax of the females cubical, with no 
transverse sutures. 
Sp. 1. Mut. Europica. Linn;, Fabr., Panz., Latr., Leach. 
Inhabits sandy places. 
Genus 442. MYRMOSA. Latr., Jurinc, Pang., Leach. Mutili.a. 
Rossi. IIyl.eus. Fabi-. 
■Abdomen depressed, elliptic in the males, conic in the females: thorax 
composed of two segments, the anterior segment transverse. 
1. Myrm. melanocephala. 
Jl.Vfmosa melanocephala. Latr., leach. 
Inhabits 
Subdivision 2 . — Ocelli distinct, smooth : wings never wanting. 
Fam. XI. Scoliam. Leach. 
Joliet®. Latreille. 
thorax with the first segment transverse-quadrate, or forming an arc : 
feet short, or moderately long ; the hinder ones thick, spinulose, or 
