852 NEW YORK STATE MUSEUM 



Leaf -cutter bees, M e g a c h i 1 e 

 The popular name comes from the peculiar habit certain 

 species, at least, have of cutting bits out of leaves to use in 

 nest building. 



118 Megaehile montivaga Cress. 



119 M. 1 a t i m a n u s Say 



120 Andrena crataegi Rob. 



121 A. fimbriata Smith 



122 Agapostemon radiatus Say 



123 Halictus parallel us Say 



124 Wasp, P o 1 i s t e s p a 1 1 i p e s St Farg. 



125 Vespa arenaria Fabr. 



126 Yellow jacket, Vespa diabolica Sauss. 



127 White-faced hornet, Vespa maculata Linn. 



Flower flies; syrphns flies, S y r p h i d a e 



128 Spilomyia fusca Loew 



129 Helophilus latifrons Loew 



130 H. s i m i 1 i s Macq. 



131 Eristalis flavipes Walk. 



132 E. t e n a x Linn. 



132a Tr. opidopria c o n i c a Fabr., a parasite of the 

 above. 



133 Eristalis t r a n s v e r s u s Wied. 



134 Volucella evecta Walk. 



Parasites 

 A number of serious insect pests are held in check by para- 

 sitic enemies. These beneficial species should be protected, 

 and in fighting insects the destruction of parasites should be 

 avoided whenever possible. 



135 Pteromalus vanessae How. 



136 Pimpla conquisitor Say 



137 O p h i o n purgatum Say 



138 Ichneumon flavicornis Cr. 



139 Red-tailed tachina fly, Winthemia 4-pustulata 



Fabr. 



