334 PTILOTA. 



the posterior smaller than the anterior; an 

 exserted ovipositor or sting in females of the 

 majority. (Bees, wasps, saw-flies, &c.) 

 b. Mouth transformed into a spiral tongue ; wings 

 farinose. 



Order Lepidoptera. (Butterflies, moths.) 

 B. Wings, two. 



Order Rhipiptera, Latr. (or more properly 

 Strepsiptera, Kirby.) Ilalteres, two, placed 

 in front of the wings, which are folded longi- 

 tudinally. 



Order Diptera. Halteres, two, placed behind 

 the wings. (Two-winged flies.) 



