160 
BRITISH BEES. 
Section 2. Cenobites (Dwellers in Community). 
Subsection 1. Spurred. 
t Parasitical. 
Genus 25. Apathus. 4- 
ff Collectors. 
Temporarily social. 
Genus 26. Bombus. 
Subsection 2. Unspurred. 
Permanently social. 
Genus 27. Apis. / l Q 
The primary division of the bees into two large 
branches, viz. into the Andrenidae, or abnormal bees, 
and the Apida, or normal bees, is effected by the mode 
in which they fold the cibarial apparatus in repose. 
In the description of the structure of the imago, I have 
enlarged upon these organs, and for their explanation I 
must refer to that chapter where diagrams exhibit the 
structure of the different kinds of trophi of the bees, as 
well as their mode of folding. Here it is only necessary 
to notice that in the Andrenidae, the joint at the base 
draws back the basal portion when protruded, and this 
basal portion is further jointed at the point of the in¬ 
sertion of the paraglossse and labial palpi, and parallel 
with which joint the maxillm are likewise jointed close 
to the sinus where the maxillary palpi are inserted 
laterally upon it. The basal portion thus throws the 
anterior part forward or retracts it, at the will of the 
insect, and in the latter case, being then in repose, it lies 
in contiguous parallelism to the basal half, but beneath 
it. When thus withdrawn, the short tongue itself, with 
its paraglossse and labial palpi are sheltered beneath the 
