COLf.ECriOX OF AQUAPIC INSECT LARVAE i -r 



fio that the preservative ina.v eniei- I lie hod v. A small 

 veutral slit is siifticient. 



Small Hasks or chemists' hoitles. holdinji: one-fenrth 

 or one-half an ounce, are excellent for keejiing this 

 material. A thick plank, with holes drilled into which 

 the hottles may fit, is a convenient holder for snch a col- 

 lection. 



Much of what Mr. Hardenherfj: writes about the study 

 of Lepidopterous larvae, and the interest and usefulness 

 of collecting them, api)lies to the study of aquatic larvae. 

 The comparative anatomy of such items as the curious 

 graspino^ elongated labium of Anisopterous larvae, or 

 the gills at the end of the abdomen in Zygopterou-s 

 larvae, have proved interesting to workers else Adhere. 

 There are in these larvae some remarkable instances of 

 close and perfect adaptation to their mode of life. One 

 of the Kpiieujeiid larvae of the Xearctic region has a 

 complete apparatus for catching by means of a net the 

 small Crustacer, <m which it feeds. The Auisopteran 

 dragxmtlies, inhabiting muddy bottoms, as larvae, have 

 a gill-chamber that is not only a highly perfected 

 machine for respiration, but that is completely protected 

 from the ingress of harmful particles in the water. 



The list might be much extended, but the mere fact of 

 its being a fi^eld nearly wholly untouched in South 

 Africa should serve to attract collectors to the aquatic 

 larvae of In sec Is. 



