CLASS V. INSECTA. 
281 
Dasypoda plumipes. Panz., Leach. Melitta Swammerdamella. Kirby. 
Inhabits Europe. It was first noticed by the illustrious Swammer- 
dam. They burrow in sandy soil, throwing up a heap of sand with- 
out their hole. 
** Superior wings with three submarginul cells, the second small. 
Genus 468. ANDRENA. Fair., Panz., Jurine, Illig., Spinola, 
King, Leach. Apis. Linn., Pill. Melitta. ** c. Kirby. 
-I luxilla bent at their extremity', their terminal lobe scarcely longer 
than broad : hinder feet with the first joint of their tarsi shorter than 
the tibiae: labium or lip little elongate, shorter than its palpi. 
' S P- 1. And. nigro-tfuea. 
Melitta nigro-aenea. Kirby. 
Inhabits the blossoms of sallows in the spring. 
Obs. — The species of this genus are extremely numerous, and a vert- 
large portion of them inhabit Britain. Their proboscis is downy 
and thick. The hinder legs of the male are furnished with a floccu- 
lus at their base, the tibia 1 with a thick scopa or brush, and their 
anus is covered by a fringe of hairs. They nidificate under ground 
in a light soil, some choosing banks over which bushes are scattered, 
others bare perpendicular sections, but all seem to prefer a southern 
aspect. They excavate burrows of a cylindric form, from five inches 
to nearly a foot or more in depth, of such diameter only as to ad- 
mit the insect. In making these holes they remove the earth grain 
by grain, which they throw up on the outside of their holes in the 
form of a hillock. Some species penetrate in a horizontal, and 
others in a perpendicular direction. They construct a cell at the 
bottom of this hole, which they replenish with pollen made into a 
paste with honey, and in this they deposit their eggs. The pollen 
they carry in the scopa or brush of their hinder tibia?, upon the floc- 
culus at the base of the hinder thighs, and on the hairs of the me- 
tathorax. When the female has committed her egg to the paste, 
she very carefully stops the mouth of her hole, to prevent the in- 
gress of ants, or of other insects which might be enemies to the 
larva. 
Genus 469. CILISSA. Leach. Melitta. Kirby. Andben.a. Lair., 
Panz. 
bent ntear their middle, the terminal process very much 
longer than broad: Up elongate, longer than its palpi: superior wings 
frith three submarginal cells, the second small. 
Obs — This genus is not only distinguished from Andrena by the cha- 
racters of the lip and maxilla 1 , but also by having a longer tongue 
with verv minute auricles, and the tops of the valves cultriform. 
S P- 1. Cil. triebneta. 
