148 Mr. K. Kunhi Kannan on An Instance of Mutation. 



Seychelles, Mr. Ehrhorn, Entomologist, Honolulu, for kindly 

 furnishing samples of green bug from their countries. I 

 am also indebted to Mr. E. E. Green for the encouragement 

 he gave me. 



Explanation of Plates V-VIII. 



Plate V, tig. 1. Coccus viridis, one of the first specimens scut in 

 for identification on the outbreak of the pest in Mysore in 1912. 

 Fig. 2. Coccus colemani. Fig. 3. C. colemani. Fig. 4. Larva of 

 C. colemani, just hatched. Note that there are only three segments 

 in the antennae. 



Plate VI, fig. 1. The round form from Java. Note the dermal 

 cells. Fig. 2. The long form from Java. Note dermal cells. 

 Fig. 3. P. psidii. Fig. 4. Pulvinaria psidii. 



Plate VII, fig. 1. Antennae of the long form from Java. 

 Fig. 2. Antennae of the round form from Java. Fig. 3. Antennal 

 variation in P. psidii, round form from Java, C. viridis, C. colemani. 

 Fig. 4. Variation in the antennae of P. psidii and stagesof reduction 

 from the antennae of C. viridis to the antennae of C. colemani. 

 Fig. 5. Antennal variation in the abnormal round form from Java, 

 and the abnormal long form from Java. 



Plate VIII, fig. 1. L. hemisphaericum turned over to show the 

 waxy secretion along the margin of the body, and the mark left on 

 the leaf as a result of the filaments adhering. Fig. 2. The secretion 

 of meal in P. 2^sidii. Fig. 3. < '. viridis showing the hind end of the 

 body tilted up much as in P. psidii. Fig. 4. Variations in the anal 

 plates of P. psidii from Green, of P. psidii from Bangalore, C. 

 viridis from Ceylon, and ('. riritlis from Bangalore. 



