142 . ILLINOIS BIOLOGICAL MONOGRAPHS (460 



EXPLANATION OF PLATE 

 LARVAE OF TENTH REDINOIDEA 



Fig. 1 — Pamphiliidae. Pamphilius sp. Y-125. 



Fig. 2 — Cephidae. Janus integer. 



Fig. 3 — Xiphydriidae. Xiphydria sp. 



Fig. 4 — Siricidae. Tremex columba. 



Fig. 5— Oryssidae. Oryssus occidenialis 



(After Rohwer and Cushman, 1917). 

 au anus 



msp mesothoracic spiracle 

 sba subanal appendage 

 spi abdominal spiracle 

 srp suranal process 

 //g^ mesothoracic leg 

 tsp metathoracic spiracle 



