68 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[68 



EXPLANATION OF PLATE VIII 



VENTRAL ASPECT OF THE HEAD 



Fig. 149. H>'pothetical t>'pe. 

 Fig. 150. Telracha Carolina. 

 Fig. 151. Ckindela formosa. 

 Fig. 152. Calosoma calidum. 

 Fig. 153. Harpaltts erraticus. 

 Fig. 1.54. Amphizoa lecontci. 

 Fig. 155. Onwphron amerkanum. 

 Fig. 156. Peliodyles l2-piinclalits. 

 Fig. 157. Cybiskr fimbriolatiis. 

 Fig. 158. Dincutes americanus. 

 Fig. 159. Hydraena marginkoUis. 

 Fig. 160. Hydroscaplia nalans. 

 Fig. 161. Hydrous triangularis. 

 Fig. 162. Hydrophilus obtusalus. 

 Fig. 163. Platypsyllus castoris. 

 Fig. 164. Braihinus nitidis. 

 Fig. 165. Lepliniis testaceus. 

 Fig. 166. NecTophorus carolinus. 

 Fig. 167. Clambus puierulus. 

 Fig. 168. Connophron Jossiger. 

 Fig. 169. Molamba lunata. 

 Fig. 170. Stenus flavkornis. 



aa antacoila 



(j/ antafossa 



an antacoria 



ccp cervepimeron 



CCS cervepisternum 



cct cervisternum 



ce compound eye 



gu gula 



gub gula bar 



in invagination 



inl line of invagination 



/ labrum 



mn metatentorina 



nil metatentonuju 



