490 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
4. More slender species; body black; thorax shining............. 5 
More robust species partly brown; thorax subopaque......... 6 
5. With very sparse pile; tips of antennae brown; neck shorter; 
anterior border of clypeus convex.............. apicalis Mann 
Abundantly pilose; tips of antennae black; neck longer. 
madeirensis Mann 
On. Geasber SITS 675 clos be sidnc toast debates haya kyla died ot ae ce fi 
(GCASTCT OMAGUE «0:58 « sp saspas Ga hala gen base eee Coan See 8 
Cog Mea SHET DIAG) Bios coax nurse hah re taciealucrs (alien seat iene traili Mayr 
ASG PCM tras cigiosn ea kee a traili var. rufogaster Mann 
8. Gaster brown, with distinct punctation...... nidulans (Smith) 
Gaster black; punctation very fine....../...... fabric Roger 
