WSE( T-ARCEITECTURE. 



1-:: 



these in Europe i Psyche helix) constructs a Bnail-like c 

 Beetle-grubs rarelj construcl such i but the little 



0hlamy8 is a genuine sack-bearer, ae U another leaf-eater, 

 ( 'oscinoptera doinini 



All the Caddis-flies are Back-bearers in their larval si 

 and the larva- are from this habit called case-worms. The 

 worm apparently builds them by adding grain after grain 

 of coarse sand to the mouth of the tube, lining the interior 

 with silk; if there is moss at hand, bits arc fastened to the 

 exterior, or large pieces of leaves. Fig. 233, a, represents 



a 



£b 



Fig. 288.— Different forms of ca 



the case oi the European Phryganea grandisjhui we have 

 a similar one, formed by cutting a leaf into a broad ribbon- 

 like strip and then rolling il into a tube. Some are like 

 horns, while the case of Belicopsyche (Fi| ften 



been mistaken by shell-collectors for a fresh-water snail 

 (Valvata), 



A- architects ants are preeminent, and they evince their 

 skill in construction not by mounds alone, but 

 digging deep wells and tunnelling broad ri • well as 



in laying out roads above and below ground. 



While our native species are not known to '"'"in elaborate 

 nests, a greenish ant in India (QScop ■•') is 



