Hymenoptera acuhata from Majorca and Spain. 649 



from the Canaries and Madeira, and yellowish-red also in 

 a few European species. It is, however, very little de- 

 veloped, and the effect is quite different from the broad 

 transverse band of the abdomen in Fomjrilus, etc. 



This great assemblage of species convergent in colours 

 and pattern can be broken up into many sub-groups, more 

 or less closely welded together by intermediate links. 

 Thus the dark wings and intense black of the species of 

 Pompilus, together with the position of their deep red 

 abdominal bands, make a very characteristic sub-group. 

 The black and red species of Ammophila form the centre 

 of another, while perhaps the most extensive of all these 

 subordinate associations is that which has Sjjhccodcs for 

 its centre — the group of which we had so interesting an 

 experience in the valley below San Geronimo. E. B. P.] 



Halictus 4-cinctus, F. 



1901. Port Bou : June 24.— 1 ? A. H. 



Barcelona: Juhj 16.— 1 ^, 8 ? W. H., 1 ? 



A. H. 

 Montserrat, near summit, San Geronimo 

 (about 4000 ft.) : July 15.— 3 $ E. B. P., 

 4 ^ W. H., 5 $ A. H. 



Halictus 6-cinctus, F. 



1901. Barcelona : July 16.-1 ? W. H. 



Halictus scabios^e, Rossi. Common, var.(?) ochra- 

 ceovittatahis, Drs. 



Halictus tetrazonius, Klug. 



1901. Port Bou : June 24.— 1 ^, 1 $ W. H. 



Halictus pyren^us. Per. (?). 



1901. Montserrat, near Railway Terminus: July 14. 



—4 $ E. B. P., 3 ? W. H., 2 $ A. H. July 



16.-2 $ W. H. 

 Montserrat, Hospederia to San Geronimo 



(3000-4000 ft): July 15.-1 $ W. H. 

 Montserrat, near summit, San Geronimo 



(about 4000 ft.): J^cly 15.— 1 $ E. B. P., 



2 $ W. H. 



1902. El Escorii 1: July 28.-1 $. 



Halictus, sp. (?). 



1901. Montserrat, near Railway Terminus : July 14. 

 —2 $ A. H. 



TRANS. ENT. SOC. LOND. 1904. — PART III. (SEPT.) 42 



