198 MODERN CLASSIFICATION OF INSECTS. 
other species.*) The larva is described by the latter as possessing 
twelve segments, exclusive of the head and an anal tubercle (making 
fourteen segments in the whole). The head, which the insect moves 
about in all directions, has two small black tubercles on the lower part 
of the face, which appear to be eyes, but different from the ocelli of 
the imago; it is destitute of antenne: the labrum is separated by a 
line from the clypeus ; the lower lip is elongated, cylindrical, swollen, 
protruded beneath. [This protruded part, I apprehend, is the true 
labium and the lateral parts.] The maxille [or, rather, the man- 
dibles] are cylindrical; and in the middle they are enclosed between 
the Jabium and upper lip. The last segment of the bedy is termi- 
nated by a small and very curious pointed cone. When full grown, it 
spins an oval and slender cocoon, of a pale colour, thickened at one 
end, and provided with a small brush of black hair, which is used in 
fixing the cocoon in the ground. (Mémoire sur les Abeilles solit. Ha- 
licte, p. 44.) 
Other species of the genus provision their nests with species of 
Curculionide. Of these I have published ( Zrans. Ent. Soc. i. p. 203.) 
an account of the habits of Cerceris arenaria Zinn. (leta Fab. Curt.), 
which makes its burrow in sand, and provisions it with a species of 
Strophosomus (one of the Curculionide), which during flight it 
carries by means of its four fore legs, its hind legs being extended. 
According, however, to the Entomologische Bemerkungen (Brunswick, 
1790, p. 6.), other short-snouted weevils are employed by this species, 
such as Pachygaster picipes, raucus, &c. Cerceris aurita, according 
to Latreille (Annales du Museum, tom. xiv., and Bull. Soc. Philomat. 
1810), employs the destructive Lixus Ascanii and other weevils ; and 
M. Bosc has described two other species of this genus (Annales 
d Agriculture, tom. lvi. p. 89.), which select other species of the same 
family. St. Fargeau also states that they have the instinct to capture 
these beetles at a time when their elytra are soft, from having been 
but recently disclosed. 
M. Walckenaer has also described a cocoon which he discovered in 
the ground, covered with the débris of multitudes of a species of 
Chrysis, and which he considered had probably served for the food of 
the larva of one of these insects. 
We are indebted to Latreille for a most interesting account of the 
economy of Philanthus triangulum /’ad., apivorus Zaétr. (published in 
* Mr, Curtis states that it is with the dead bodies of the Andrenz that they pro- 
vision their nest; but this is incorrect. (Brit. Ent. 269.) 
