650 Mr. Edward Saunders on 



Allied to tetrazonius, but with the mandibles simple ; 

 differs from Perez's description of ijyrenxus in the short 

 cheeks, and the want of the pencils of hairs at the lateral 

 aj'ices of the 4th ventral segment. 



Halictus separandus, Sclimied. 



1901. Port Bou : Jitne 24.— 1 $ A. H. 

 Cerbere: J^ily 17.— 1 $ E. B. P. 

 Montserrat, near Railway Terminus : July 14. 



— 3 ^ E. B. P., 1 ^, 1 $ A. H. July 16. 



—1 $ W. H. 

 Montserrat, near summit, San Geronimo 



(about 4000 ft.) : July 15.— 1 ^ W. H. 



Halictus platycestus, Dours. 



1901. Barcelona : July 16.-2 ? E. B. P., 5 ? W. H., 

 1 ? A. H. 



Halictus leucozonius, Kirb. 



1901. Montserrat, Hospederia to San Geronimo 

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

 Montserrat, near Railway Terminus: July 16. 

 —1 $ W. H. 



Halictus interruptus, Pz. 



1901. Port Bou : June 24.-2 $ E. B. P., 2 $ W. H, 



3 ? A. H. 

 Montserrat, near Railway Terminus: July 14. 



—1 $ E. B. P. 

 Montserrat, near summiit, San Geronimo 



(about 4000 ft.) : July 15.— 1 ^ W. H. 



Halictus, sp. (?). 



1901. Port Bou : June 24.— 1 $ A. H. 



Halictus costulatus, K. 



1902. La Granja: July 22.— 1 $. J^dy 23.-2 ?. 



July 24.-2 $. July 26.— 1 ?. July 26. 

 — 1 ^ (being devoured by Dasypogon 

 diadema ^). 

 La Granja, above Palace: July 21. — 1 $. 



