148 



ILUNOIS BIOLOGICAL MONOGRAPHS 



[466 



Fig. 16 — Cladiinae. 

 Fig. 17 — Nematinae. 

 Fig. 18 — Nematinae. 

 Fig. 19 — Blennocampinae. 

 Fig. 20 — Blennocampinae. 



EXPLANATION OF PLATE 



LARVAE OF TENTHREDINIDAE 



Cladius peclinicornis. 

 Pkronidea ventralis. 

 Pteronidea ribesi. 

 Monophadnoides rubi. 

 Tomostethus bardits. 



au anus 



tnsp mesothoracic spiracle 



pig larvapod 



spi abdominal spiracle 



srp suranal process 



tig* mesothoracic leg 



tsp metathoracic spiracle 



