LAEVAL FOKMS OF COLEOPTEEA 



Plate 65 



Helodidae 



A. Prionocyphoii diseoideus Say. 



A. 



B. Prionocyphoii diseoideus 



B.* 



C. 



D. 

 E. 



F. 



G. 



H. 



: Mandible and epipharynx; 

 i.s., not branched inner 

 seta of the marginal 

 front row of long- epi- 

 pharyngeal setae. 

 Helodes marginata F. (Denmark) : Epipharyngeal marginal 



setae ; i.s., branched in- 

 ner seta. 



: Ventral monthparts and 

 part of prothorax. 



: Apical and postapical joints 

 of maxillary palpus ; 3, 

 subapical joint; 4, apical 

 joint; spl, sensory pa- 

 pillae ; notice the indica- 

 tion of a subdivision of 

 the postapical joint. 



: Innerside of mouth with 

 large maxillulae. 



: Tassels of gills. 



: Larva; aj, multiarticulated 

 apical joint of antenna ; 

 sj, supplementary joint 

 of antenna. Lateral view. 



: Larva; aj and sj as in fig- 

 ure E. Dorsal view. 



: End of abdomen ; AC, ali- 

 mentary' canal with anus ; 

 8 sp, spiracle of eighth 

 abdominal segment. Dia- 

 gram ; lateral view. 

 End of abdomen. Ventral 



: view. 



216 



