144 



ZOOLOGICAL PHILOSOPHY 



(B) Biting Insects. 

 The mouth exhibits mandibles, usvally accompanied by maxillae. 



Oedeb 5. — ^Hymbnopterotts Insects. 



Mandibles, and a sucking-tube of three Tnore or less elongated pieces, whose base 

 is enclosed in a short sheath. 



Four wings, naked, membranous, veined and unequal ; anus of the females 

 armed with a sting or prcwided with a boring-apparatus ; pupa motionless. 



(1) Anus of the females armed with a sting. 



Bee. Aat. 



Monomelites. Mutilla (solitary ant). 



Nomada. Scolia. 



Euoera. Tiphia. 



Andrena. Bembex. 



— Crabro (digging-wasp). 



Wasp. Spbes. 

 Polistes. 



(2) Anus of the females provided with a boring-apparatus. 



Chalcis. 



Cioips. 



Diplolepis. 



Ichneumon. 



Wood-wasp. 

 Evania. Oryasus. 



Foenus. Tenthredo (saw-fly). 



— Cimbex (saw-fly). 



Chrysis. 

 Oxyurus. 



Leuoopsis [Diptera. H. E.]. 



Obdeb 6. — Neuboptebous Insects. 

 Mandibles and maxillae. 



Four mngs, naked, membranous and reticulated; abdomen elongated, without 

 sting or boring-apparatus ; larva hexapod ; metamorphosis variable. 



Perla. 



Nemoura. 



Caddis-fly. 



(1) Pupa motionless. 



Hemerobius. 

 Ascalaphus. 

 Myrmeleon. 



(2) Pupa active. 



Nemoptera. 



Panorpa. 



Psoous. 



Termes (white ant). 



Corydalis. 

 Chauliodes. 



Raphidia. 

 Ephemera. 



Agrion. 



Aeshna (dragon-fly). 



libellula (dragon-fly). 



