lO HYMENOPTERA. 



following guests :— The Humble-bee moth, Ncphop- 

 teryx Edmaiidsii Pack. Of this species very many 

 specimens were found. Its habits are similar to those 

 of the Bee-moth, Galkria. From the larvae of the 

 Humble-bee moth I bred two ^7K'C7i%\tt?,,—Microgaster 

 ncphoptcricis Pack., and a larger Ichneumon-fly, 

 which Mr. Cresson says is an undescribed species 

 of Lunneria. Several beetles and a cockroach were 

 also observed in this nest. 



2. Solitary Bees. 



With the solitary-bees there are only two forms, — 

 males and females. The females perform both the 

 duties of workers and queens, each female building 

 and provisioning a nest for her young. The habits of 

 the following species will be carefully described dur- 

 ing the lectures. 



The Carpenter-bee, Xylocopa Virginica Dr. (i, 132). 



The Leaf-cutter bee, Megachile acuta Sm. 



The Leaf-cutter bee, Megachile hrevis Say. (9. III., 

 210). 

 ^ Th e Mining-bee, Andrena vicina Smith, (i, 144). 



3. Parasitic Bees. 



The parasitic-bees live within the nests of other 

 bees. The most familiar examples are the different 

 species o{ Apathus, which very closely resemble Hum- 

 ble-bees, and live in their nests, (i, 131). 



Vespari^ (Tyz^- True Wasps). 



The True Wasps may be distinguished from all 

 other Hymcnoptcra by their wings being folded longi- 



