IO 



INSECTS. 



93. Vefpa. Sting pungent : upper wings folded. ■ 



94. Apis. Sting pungent : tongue inflected. 



95. Formica. Sting obfolete : neuters without wings, 



96. Mutilla. Sting pungent: neuters without wings. 



VI. DIPTERA. Wings 2. 



99. Diopfis. 

 \ 98. Tipula. 



100. Mufca. 



1 01. Tab anus. 



103. E??ipis. 



105. Conops. 



97. Oeftrus. 



106. Afilus. 



104. Stomoxys. 



102. Ctt/^AT. 



107. BombyJus. 



108. Hippobofca. 



B. 



A. /^7/A probojeis and fucker. 

 Head 2-horned : eyes terminal. 

 Sucker without a (heath : feelers 2, projecting, 



filiform. 

 Sucker without a fheath, furnimed with brif- 



tles. 

 Sucker with a fmgle-valved fheath, furnimed 



with briftles. 



Probofcis inflected* 



Probofcis projecting, geniculate. 



With fucker, but no probofcis. 



Sucker retracted within the perforated lips. 

 Sucker flraight, 2-valved, gibbous at the 



bafe. 

 Sucker with a fingle valved convolute (heath, 



geniculate at the bafe. 

 Sheath exferted, 1 -valved, flexile, with 5 brif- 



tles. 



Sucker very long, flraight, fetaceous, 2-valved. 

 Sucker fhort, cylindrical, flraight, 2-valved. 



VII. APTERA. Wings o. 



A. Legs 6 : head difiincl from the thorax. 

 109. Lepifma, Tail ending in fetaceous briftles. 



no. Podura*. Tail forked, inflected, elaftic. 



in. Termes* Mouth with 2 jaws : lip horny, 4-cleft. 



112. Pediculus. Mouth armed with an exfertile fting. 



113. Pulcx. Snout inflected, armed with a fting : feet form- 



ed for leaping. 



B. Legs 



