DIPTERA. 45 
Any one who observes how deep the fore part of the boat is, and 
how near the edges of its sides are to the water, forgets for the 
we 
WZ 
SM] 
Wy A 
Zz 
ANS MMDHKXX 



Fig. 30.—Gnats emerging. 
time being that the gnat is an insect that he would willingly 
destroy at other times. One feels uneasy for its fate; and the 
more so if the wind happens to rise, particularly if it disturbs the 
