490 



TIIK .l.l//;A'/r.l.V SATl h'M.lsr [Vol. XLI 



(FijT. 7 D). Placed in a deep vessel ..f cit-ar walrr tlie Hydro- 

 porus larvjie spend mucli time .swiiniiiiiiu' nlxnu in this manner, 

 very rarely risin(^ to the surl'act\ Dutinu' vaiioiis periods of 



half a dozen specimens to^-etlier in a lariiv hcakcr, nor one of them 

 rose to the surface. \Vlien kept in a shallow .lish of water with 

 plant fragments, they sjKMit nnich lim(> crawling- alnnit on the 

 bottom, creeping beneath dead leaves, or hiding in the hollows of 

 the typha stems. 



Suppln»nital dr.srrlplions oj hlfhrrto >n,L-m>irn larra^ of D,jfi.nihr 

 I. Coptotomus interrogatus I'nhr. (supposition). L.mio|1i of larva: 



