54 ILLINOIS BIOLOGICAL MONOGRAPHS [286 



EXPLANATION OF PLATE 

 CEPHALIC ASPECT OF THE HEAD 



Fig. 4. Epilachna borealis. 



Fig. 5. Chilocorus bivulnerus, lateral aspect. 



Fig. 6. Chilocorus bivulnerus. 



The label els for the clypso-labral suture is wantuig. 



Fig. 7. Megilla maculata. 



Fig. 8. Hippodamia 13-punctata. 



Fig. 9. Hippodamia convergens. 



„„.„„.. mco mandacoria 



ds djSo4abral suture -& mamillary palpus 



a cljrpcalsuture « Svoeus 



£ ^andclypcus % gffiU. 



g frrf w+ea fused stipes and cardo 



f Km "»* supratentorina 



tipl labial palpus » vertex 



md mandible 



