200 



INTRODUCTION TO ZOOLOGY. 



E— Wings more or less folded longitudinally in repose; antennae fllilorm 

 or sub-flliform. 



F— Intermediate tibiiB with two apical spurs (Vespidee.) 



FF— Intermediate tlWae with one apical spur (Eumenids.) 



EE— Wings not folded longitudinally. 

 F— Prothorax usually consisting of little more than a narrow collar, 

 the posterior angles not reaching the tegulse : female never wing- 

 less. 

 G— Anterior wings with two complete sub-marginal cells. 

 H— Prothorax short, transverse; metathorax short, rounded pos- 

 teriorly; clypeus not carinate or rostriform. 



(Pemphredonidae. ) 



HH— Prothorax long and narrow, produced anteriorly into a neck ; 



metathorax elongate, truncate behind ; clypeus carinate and 



rostriform (Ampulicidae.) 



GG— Anterior wings with three complete submarglnal cells. 

 H — Abdomen sessile or sub-sessUe. 

 I— Second submarglnal cell receiving both recurrent nervures. 

 J — Marginal cell not appendlculate; mandibles with exterior 

 margin entire. 

 K— Labrum distinctly exserted, sometimes rostriform. 



(Bembecldae.J 

 KK— Labrum short, not exserted (Nyssonidse.) 



ANTEBIOB WING OF HYMENOPTEB (MELLINUS). 



1.— Costal cell. 



2. — Median cell, , 



3.~Sub median cell. 



4.— Anal cell. 



5. — Marginal cell. 



6.— First submarglnal cell. 



7.— Second submarglnal cell. 



8.— Third submargmal cell. 



9.— Fourth submarglnal cell. 

 10.— First dlscoldal cell. 

 11. - Second dlscoldal cell. 

 13.— Third dlscoldal cell. 

 13. — First apical cell. 

 14.— Second apical cell. 



-Costal nervure. 



-Sub costal nervure. 



-Externo-medial nervure. 



—Anal nerviu-e. 



-Marginal or radial nervure. 



-Basal nervure. 



—First transverso-cubital nervure. 



—Second " " " 



-Third " 



-Transverso-medial nerviire. 



-Dlscoldal nervure. 



-Cubital nervure. 



— First reciu^rent nervure. 



—Second " 



-Subdlscoldal nervure. 



—Stigma. 



—Posterior margin. 



-Apical margin. 



JJ — Marginal cell appendlculate ; mandibles deeply emarginate 



on the exterior iiiiirt^in (Larrlda3. ) 



II— Second and third submarglnal cell each receiving a recurrent 



nervure \Philanthldffi.) 



BH— Abdomen petiolate. 



