xv. 3 Cocker ell: The Black Halictine Bees 271 



12. Area of metathorax entirely dull, very coarsely reticulate. 



s thoracicus.sublustrans subsp. nov. 

 Area of metathorax shining or closely sculptured 13. 



13. Large species, with dark teguke and very coarsely punctured mesotho- 



rax; apical area of first abdominal segment closely punctured. 



baguionis Crawford. 

 Mesothorax not thus coarsely punctured 14. 



14. Scutellum sparsely punctured 15. 



Scutellum closely or finely punctured, often dullish or dull 22. 



15. Scutellum dullish, with large, very sparse punctures; mesothorax dull, 



with large sparse punctures (Mount Banahao).... oligostictus sp. nov. 

 Scutellum shining; mesothorax with fine or close punctures 16. 



16. Mesothorax highly polished, little punctured; tegulae amber 17. 



Mesothorax dull or distinctly punctured 18. 



17. Hind margins of abdominal segments testaceous; area of metathorax 



distinctly striate, except the shining apical part (Mount Maquiling). 



lionotulus sp. nov. 

 Hind margins of abdominal segments not testaceous; area of meta- 

 thorax not distinctly sculptured (Mount Banahao). 



scintillans sp. nov. 



18. Head very large; scape largely red; anterior knees red in male; female 



unknown (Mount Banahao) _ scintillans sp. nov. 



Head not large; scape dark; abdomen with distinct bands of tomentum 

 at bases of at least some of the segments 19. 



19. Larger species; middle of hind basitarsi with ferruginous hair on 



inner side; mesothorax shining and with very distinct punctures. 



luzonicrs Strand. 

 Smaller species; basitarsi without strongly red or orange hair 20. 



20. Stigma pale testaceous; area of metathorax shining, with very dis- 



tinct longitudinal plicae; first abdominal segment with a tuft of 



white hair on each side philippinensis Ashmead. 



Stigma dark 21. 



21. Disk of mesothorax very sparsely punctured; posterior truncation of 



metathorax brilliantly shining (Baguio) postlucens sp. nov. 



Disk of mesothorax much more closely punctured; posterior truncation 

 dull or dullish, except upper end itaminus sp. nov. 



22. Hind margins of at least some of the abdominal segments pale tes- 



taceous; teguk* ruf otestaceous ; stigma dull reddish, not dark. 23. 



Hind margins of abdominal segments not testaceous 25. 



23. Testaceous band on second abdominal segment in middle occupying 



about half of segment ; first segment with broad testaceous margin ; 

 hind tibiae and tarsi dull reddish (Mount Maquiling). 



fulvovittatus sp. nov. 

 Testaceous band on second abdominal segment, if present, not occupy- 

 ing a fourth of segment 24. 



24. Larger; truncation of metathorax distinctly margined above (Davao). 



davaonis sp. nov. 



Smaller; truncation not bounded above nesiotus Crawford. 



Like the last, but more robust, with red knees and redder teguke. 



nesiotus domitus var. nov. 



