CATALOGUE 



OF 



BRITISH 



ACULEATE HYMENOPTEBA. 



Tribe I. HETEROGYNA, Latr. 



The economy of this tribe is greatly varied : some are excava- 

 tors, which tunnel and burrow in the ground, while others do so 

 in decaying trees or timber; a considerable number construct 

 nests suspended in trees. All the societies consist of males, fe- 

 males, and workers ; the latter are by some considered to be 

 abortive females. The males are always winged, the females 

 temporarily so. 



Amongst the solitary species, the females are apterous. 



Div. II. HYMENOPTERA ACULEATA, Latr. 



The species social or solitary ; the social communities con- 

 sisting of males, females, and workers ; the latter individuals are 

 barren. 



Females : their antennae 12-jointed ; their abdomen consisting 

 of six segments, and furnished with a sting. Males : their an- 



B 



