EXPLANATION OF PLATES li to IV. 



PLATE IL 



Fig. 1. — Photograph of typical green bug {Coccus viridis) from beneath, 

 showing seven-jointed antennae. 



Fig. 2. — Photograph of gi-een bug now found generally on coffee in 

 South India {Coccus colemani) from beneath. Note the 

 three-jointed antennae. 



Fig. 3. — Nymphal stage of {Coccus colemani) from beneath, showing 

 three-jointed antennae, mouth structures, legs and anal 

 structures. 



Fig. 4.^Photograph of mealy bug {Pulvinaria psidii) from beneath, 

 showing eight-jointed antennae. 



PLATE IIL 



Fig. 1. — ^Photograph of coffee leaves and twigs infested with green 

 bug {Coccus colemani). 



Fig. 2. — Photograph of experimental infestation of coffee with green 

 bug through the agency of an ant {Oecophylla s^naragdin^a) . 

 The two coffee plants in pots have been isolated by stand- 

 ing them supported in basins of water. The plant to the 

 left contains an ants' nest but was at the beginning of the 

 experiment free from green bug. The plant to the right 

 was badly infested. The only way plant No. 1 could be 

 infested is by ants carrying the bugs across the tape join- 

 ing the two plants. The crossing of the bugs of their own 

 accord did not take place as the plants were under constant 

 observation during the day and the connection was broken 

 during the night. 



PLATE IV. 



Fig. 1.— Photograph of larvas and pupae of the moth Eubl&tnvia sp., 

 covered with empty skins of mealy bugs which have been 

 destroyed by them. 



Fig. 2. — Photogx'aph of mite found attacking green bug. 



Fig. 3. — -Photograph of coffee leaf showing green bug attacked by 

 white fungus {Cephalosporium lecanii). 



Fig. 4, — Photograph of green bug showing at A the pupa of a Viymen- 

 opterous parasite. 



Pjq 5. — Photograph of green bug with hymenojiterous parasite and 

 hyper-parasite. A, the antenna of the parasite ; B, the 

 hyper-parasite ; C, remains of abdominal portion of parasite. 



