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A MANUAL OF DANGEROUS INSECTS. 



HYMENOPTERA. 

 Cimbicldae. 



Cimbex variabilis Klug, sawflj ; Europe; attacks leaves, and adults girdle twigs. 

 Pseudoclavellaria amerinx Linnoeus, a sawfly; Europe; attacks foliage. 



Tenthredinldae. 



Nematus (Orasus) septcnfrionalis Lirmajus and Trichiocampus viminalis Fallen; Europe; sawflies. 



Fig. S6. — Poplar borer (Sapcrda populnca): Branch olaspeu with galls containing larva, pupa, and 



adult. (Barbey.) 



DIPTERA. 

 Itonididae (Cecidomyiidse). 



Khabdophaga saliciperda Dufour; Europe; attacks Populus alba. (See Willow.) 



