98 ILLINOIS BIOLOGICAL MONOGRAPHS (340 



EXPLANATION OF PLATE \r 



LABIUM AND SPINNERET 



28. Ceramica picta, last instar, distal portion of labium, caudal aspect. 



29. PoUa renigera, first instar, lateral aspect of spinneret. 



30. Polia reiiisera, first instar, labial palpus. 



31. Polia renigera, last instar, distal end of labium, caudal aspect. 



32. Polia renigera, last instar, lateral aspect of spinneret. 



33. Lycophoiia margaritosa, first instar, distal end of labium, caudal aspect. 



34. Lycophotia margarilosa, first instar, lateral aspect of spinneret. 



35. Lycophotia margarilosa, second instar, lateral aspect of spinneret 



36. Lycophotia margarilosa, second instar, caudal aspect of spinneret. 



37. Lycophotia margarilosa, third instar, cephalic aspect of spinneret. 



38. Lycophotia. margarilosa, last instar, distal portion of labium, caudal aspect. 



