Larvae and Pupae 71 



there were too much pinning and labelling now- 

 adays, to the neglect of the observation of the won- 

 derful living creature and its individuality — for even 

 these little fellows have individualities, specific at 

 least. 



The group of larvae with long breathing tubes, M. 

 atratus, C. pipicns, C. territaus, C. restnans, C. sali- 

 narins, eats with the tubes almost continually at the 

 surface and their heads below the film. They navi- 

 gate about by the movement of the mouth-brushes, 

 leaving the surface only when disturbed. Their 

 food evidently drifts freely, being drawn in by cur- 

 rents set up by the brushes. In these five species 

 the antennae have long terminal spines and very 

 large and beautiful plumose tufts set in a notch, the 

 hairs standing out like great aigrettes and being 

 probably tactile, possibly olfactory. The larvae of 

 this group usually hang with bodies almost parallel 

 to the surface and heads depressed at a sharp angle. 

 They frequently flex the head backward and skim 

 the surface for a moment. Other forms usually 

 hang at a much greater angle, with the head nearly 

 in line with the body, so far as I have observed. 

 The maxillae here have longer hairs and are fitted 

 to catch floating particles (Fig. 13, e, page 68) as op- 

 posed to the other group, in which they are used 

 more for grubbing and for brushing over solid ob- 

 jects (Fig. 13, a, page 68). 



G. disco/or forms an apparent exception, having 

 the " floating type " of maxilla and of mandible, but 

 when one considers that, although he feeds at the 

 bottom, he lies on his back most of the time, thus 



