20 ENTOMOLOGY 
with a few irregular veins and cells; hind pair the smaller. 
Females with an ovipositor, modified for sawing, boring or 
Fic. 28. 
Hydrophilus triangularis. Natural size. 
stinging. Larve eruciform, mandibulate, caterpillar-like, 
with head and legs, or else maggot-like and apodous. Twenty- 
five or thirty thousand species. Two suborders. 
Tic. 29. 
( 
\ 
Tipula. A, larva; B, cast pupal skin; C, imago. Slightly reduced. 
Suborder Terebrantia (Phytophaga, Sessiliventres).— 
Abdomen broadly attached to the thorax. Ovipositor modified 
