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 



6. Gaster shining 7 



Gaster opaque 8 



7. Gaster black traili Mayr 



Gaster red traili var. rufogaster Mann 



8. Gaster brown, with distinct punctation nidulans (Smith) 



Gaster black; punctation very fine fabricii Roger 



