COCKERELL— HYMENOPTERA, APOIDEA 41 



1909, is very black, as described by Friese ; Cameron's male, described in the former 

 report, was not genuine unicolor. Workers bear data as follows : 



(1) Mahe. Long Island, July 12 — 22, 1908 ; Cascade Estate, February 1909. 

 Others are from various localities not specified. 



(2) Silhouette. Grande Barbe, August 2, 1908 ; Mare aux Cochons, collected by 

 Gardiner. 



This species was also obtained in the Amirantes and Chagos Islands (1905): see 

 Cameron, Trans. Linn. Soc. Lond., ser. 2, Zool., xii, p. 69 (1907). 

 Apis unicolor var. adansoni (Latreille). 

 Apis adansoni Latr., A.nn. Mus. Hist. Nat. v. (1804), p. 172. 



Localities. Three workers from Cosmoledo, 1907 {H. P. Thomasset) ; one fi-om Mahe, 

 Seychelles [Gardiner). In only one (from Cosmoledo) is the scutellum largely ferruginous ; 

 the others have it black, thus differing from true adans07ii. In one (from Cosmoledo) the 

 yellowish-ferruginous covers the first three abdominal segments, except the hind margins ; 

 in the others it does not get beyond the second. 



I include this variety under the continental (African) adansoni, because it is impos- 

 sible to define it satisfactorily as a distinct form. I believe, however, that it has arisen 

 independently from A. unicolor, to the typical form of which it is probably recessive. It 

 appears to be the prevalent form on Cosmoledo, but very rare in the Seychelles. It is 

 curious that no Ajois was collected in the Aldabra group. 



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SECOND SERIES— ZOOLOGY, VOL. XV. 



