20 



ENTOMOLOGY 



with a few irregular veins and cells ; hind pair the smaller. 

 Females with an ovipositor, modified for sawing, boring or 



FIG. 28. 



Hydrophilus triangularis. Natural size. 



stinging. Larvae cruciform, mandibulate, caterpillar-like, 

 with head and legs, or else maggot-like and apodous. Twenty- 

 five or thirty thousand species. Two suborders. 



FIG. 29. 



Tipula. A, larva; B, cast pupal skin; C, imago. Slightly reduced. 



Suborder Terebrantia (Phytophaga, Sessiliventres) . 



Abdomen broadly attached to the thorax. Ovipositor modified 



