ANTHIDIUM. 
283 
a considerable hum all the time she is gathering it, and 
when the ball is sufficiently large she flies off with it 
to her nidus; this operation she continues until suffi¬ 
cient is accumulated for her purpose, which consists in 
lining the cavity with the material; she then forms cells 
within it in succession, gluing the same material together 
to resist the escape of the mixed store of pollen and 
honey she intends to fill it with, having in the operation 
smoothed the sides of the cell which is closed after the 
deposit of the egg, and another similar cell is then pro¬ 
ceeded with, and this is repeated until the selected cavity 
is filled, or that she has exhausted her store. Having 
completed her labours, she wanders away. Sometimes 
the cavity is large and admits of the conjunction of 
many of these cells together; in that case they are all 
collectively covered with the same envelope of downy 
substance. The larva, having consumed its entire store 
of food, spins a cocoon of brown silk wherein it remains 
throughout the winter, and with the evolution of spring, 
feeling its propulsive energy, it changes into the pupa. 
In June and July, but earlier if the weather be contin¬ 
uously warm, the imago comes forth in its maturity, to 
live its little life of labour intermingled with pleasure, 
and in its pleasing hum to give cheerful notification of 
its perfect satisfaction. 
Genus 21. CHELOSTOMA, Latreille. 
(Plate XIII. fig. 2, <£ ? .) 
Apis ## c 2 y partly, Kirby. 
Gen. Char. : Body nearly glabrous and coarsely punc¬ 
tured. Head subglobose, rather wider than the thorax; 
