( 40 ) 



The percentage of the three commonest mimics is thus much 

 higher than we should expect ; but onDamba Island, so far as 

 could be judged from Dr. Carpenter's collections between the 

 beginning of May and the end of September, the results are 

 far more astonishing. The only Planema models in the whole 

 collection are a single female macarista and a single female 

 poggei neleoni in the second half of August, and a single male 

 macarista captured on Aug. 8-9. All these specimens were 

 taken in the jungle. In spite of the immense predominance 

 of /'. terra, not a single Planema telhu platyxantha appeared in 

 the collection, nor was there a single /'. epaea paragea. Even 

 more striking was the absence of /'. arenaria, by far the 

 most abundant Planema in the forests near Entebbe." 



xciv | 



.Ni>t only is there this extraordinary difference in the pro- 

 portions of the models, but the proportions of the mimetic 

 forms tu one another are also remarkably different from those 

 of the mainland, terra being far more predominant over 

 hobleyi in the island than hobleyi is over tcn-<t on the 

 mainland. 



-. Proportion of Transitional Forms between the 

 m imbtio pseudaoraras eloher on mi: [8land than on the 

 Mai mam). — The t able on p. scii. shows a quite unusual number 

 of transitional forms. Transition is indicated in various 

 directions, — between terra and obecura, between terra and 

 9 hobleyi, between terra and ' between obecura and 



j hobleyi. 



3. Possib I rHB Above Differences. — It is highly 



improbable that these remarkable differences are connected 

 with climate or season of the year; for the contrasted sets of 

 captures woe made in almost the same months. Tlio period 

 was. moreover, long enough to exclude the effects of the 

 seasons beginning and ending on different dates in different 



* Tlu- results i|i. • are not due to the captor's selection, and, 



so far as the Limited numbers go, may be depended upon in attempting 

 to form an estimate of the proportion of models and mimics in the jungle. 

 This was Dr. Carpenter's first experience of these extraordinarily close 

 mimics, and he Lad not at the time learnt to distinguish them from their 

 models. He Btates in a letter dated Dec 6th, 1911: "I was much 

 surprised to hear thai I had Bent more Pseudacraeas than Planemas, and 

 thought I had done the opposite." — E. 13. P. 



