72 



ILLINOIS BIOLOGICAL ilO.XOGRAPIIS 



[72 



EXPLANATION OF PLATE X 



VENTRAL ASPECT OF THE HEAD 



Fig. 193. 



Fig. 194. 

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 Fig. 196. 

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 Fig. 198. 

 Fig. 199. 

 Fig. 200. 

 Fig. 201. 

 Fig. 202. 

 Fig. 203. 

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 Fig. 213. 



aa 

 of 

 ap 



Cupes concolor. 

 Cephaloon kpturides. 

 Nacerda melanura. 

 Tomoxia bidentnta. 

 Macrosiagon dimidiatum. 

 Epicaula marginala. 

 Eurysklhus debUis. 

 Othnius sp. 

 Pyiho planus. 

 Neopyrochroa fiabeUata. 

 Macratria murina. 

 Notoxus anchora. 

 Zonanies Jasciatus. 

 Cebrio bicolor. 

 Euthysanius lautus. 

 Sandaliis niger. 

 Alaus ociilatus. 

 Isorhipis ruficornis. 

 Throscus chevrolali. 

 Chalcophora virginiensis. 

 Pscphenus leconlei. 



antacoila 



antafossa 



cervepimeron 



cervepisternum 



cervisternum 



compound eye 



epicranial arm 



gula 



invagination 



line of invagination 



labrum 



