Hymenoptera aculeata 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 Pompzilus, ete. 
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 Sphecodes for 
its centre—the group of which we had so interesting an 
experience in the valley below San Geronimo, E. B. P.] 
HALictTus 4-cInctTUs, F. 
1901. Port Bou: June 24.—1 2 A. H. 
Barcelona: July 16.-—1 27, 3 2 W. H., 1 2 
A. H. 
Montserrat, near summit, San Geronimo 
(about 4000 ft.): July 15—3 f EK. B. P., 
det Wie, ERs oa AR Ae 
HALicrus 6-crnctus, F. 
1901. Barcelona: July 16.—1 2? W. H. 
HALICTUS SCABIOSH, Rossi. Common, var.(?) ochra- 
ceovittatatus, Drs. 
HALICTUS TETRAZONIUS, Klug. 
1901. Port Bou: June 24.—1 3,192 W. H. 
HALICTUS PYRENZUS, Per. (2). 
1901. Montserrat, near Railway Terminus: July 14. 
—49EH.B.P.,32W.H.,22A.H. July 
16.—2 2 W. H. 
Montserrat, Hospederia to San Geronimo 
(3000-4000 ft.): July 15.—1 2 W. H. 
Montserrat, near summit, San Geronimo 
(about 4000 ft.): July 15.—1 2 E. B. P., 
2 2 We: ET 
1902. El Escorz 1: July 28.—1 . 
HALICTUS, sp. (?). 
1901. Montserrat, near Railway Terminus: July 14. 
—2 fA. H. 
TRANS, ENT. SOC. LOND, 1904,—PART III, (SEPT.) 42 
