BT R. t, TlLLYAHD. 



315 



derived from the elongated .sucking mouth-parts of the Osmi/lidcr', 

 and In' no stretch of imagination from the form of mouth-parts 

 foiaid in the Heiuerobiido'.. 



Under the n&me Branchiosfoma i^pongillm A\'e8t\\ood, the lar\a 

 of Sini/rff was, for long, a puzzle to entomologists, and indeed to 



Tcxt-Hi;.!!. — Vuuation of Sisi/r<( rii/i-'<lli/in<(, u.sp. : S,-S.,, hranchcs of Ks; 

 .(•, false (jiigiii of Rs in hiiulwing. 



zoologists in general. NeedhamO) has reared the larva of si)ecies 

 of both the American genera, Slsijra and C/imacia, but we do 

 not yet know whether they feed on the tissues of the sponge, or 

 whether they use the latter only as a shelter, from wlhcli to 

 attack other small animals. The same author has suggested for 

 the imagines of this family the appropriate name "Spongilla- 

 tlies." 



