ORDER HYMENOPTERA. 



19 



within the whorls of which they build their cells of gnawed 

 vegetable material. 



Fig. 14.— Ctenioschelus Latreillii. 



The Leaf-cutting Bees, which belong to the genus MegachUe^ are 

 also very interesting in their habits. 



Fig. 15. — Csinia Tunensis. 



Family 2, AndrenidcB—KW the insects belonging to this family 

 are solitary in their habits. The species are very numerous in 



Fig. 16. — Aiuirena CoUaris. 



this country. Many of them burrow in the ground, while others 

 have been observed to make their nests in bramble stick. They 

 are usually smooth, black insects, very unlike bees in appearance. 



