i9o6] MJTCIIKI.]. — MOUTH J'AR'JS OF MOSQU JTO J.ARi'AF 
'7 
As the above comparative scheme shows, in insectivorous forms the principal 
appendages of the mandibles and maxillae are sharp, heavy and titled for tearing ; 
or stiff, spiny, immovable, and adapted for holding the struggling prey. 'I'he cor- 
responding appendages in the non-insectivorous forms, whose food is micro- 
scopic, are more blunt and better adapted for crushing; or are slender, more or 
less movable, and fitted (as the A tuft of the maxilla) for aiding the mouth 
brushes to draw food into the mouth; or (as the smaller hairs of the ma.xilla) 
for a sieve. The plates of the lateral comb on the mandible are movable in the 
plane of the base, and, so the writer thinks, help to direct food toward the 
crushing portion, the other comb acting as a sieve and the remaining appendages 
being sieves or tactile organs. 
Anopheles and Uranotaenia seem to exactly correspond with neither of the 
foregoing groups. Tsorophora we know will prey on larvae of other species aiul 
even turn cannibal if hard pressed. Me^arhinus will do the same. J’sorophoro^ 
