298 ANNALS NEW YORK ACADEMY OF SCIENCES 



7. TibijB brown. Length, 12-18 mm (18) acutirostris sp. nov. 



Tibiae black. Length, 15 mm (19) acutirostris primipilaris 



subsp. nov. 



8. Middle and hind tibije with a row of graduated bristles on the 



flexor surface 9 



Middle and hind tibise without such bristles 21 



9. Antennal scapes flattened at the base; tibise usually not black. ... 10 

 Antennal scapes not flattened at the base ; tibise black (12) 



maculatus ocreatus Emery, 



10. Surface of gaster opaque 11 



Surface of gaster shining 14 



11. Posterior corners of head without yellow spots ; thorax dark red 



or black 12 



Posterior corners of head, with yellow spots ; thorax yellowish 

 red (3) maculatus vicinus var. luteaugulus var. nov. 



12. Head ferruginous red ; base of gaster, with golden yellow bands. 



(20) socius Roger. 

 Head black ; gaster black, or black with red basal segments 13 



13. Thorax brownish red or chestnut ; gaster often red at the base. 



(1) maculatus vicinus Mayr. 



Thorax, with black pro- and mesonotum ; gaster not red at base. 



(2) maculatus vicinus var. plorabilis var. nov. 



14. Antennal scapes not only flattened but slightly lobulate at the 



base 15 



Antennal scapes not lobulate at the base 16 



15. Length, 10-13 mm. ; head brown in front, black behind ; thorax. 



legs, petiole and at least the base of the gaster light brown or 



brownish yellow (8) maculatus maccooki Forel. 



Length, 9-11 mm. ; black ; pefiole and base of gaster slightly red- 

 dish (11) maculatus Tyulimosus subsp. nov. 



16. Thorax black like the head and gaster (F) maculatus vicinus 



var. infernalis var. nov. 

 Thorax red or brownish yellow 17 



17. Thorax red 18 



Thorax brownish yellow 19 



18. Length, 11-13 mm. ; gaster often red at the base. . . (5) maculatus 



vicinus var. tiitidiventris Emery. 

 Length, 8-10 mm.; gaster entirely black... (6) maculatus vicinus 



var. maritimus var. nov. 



19. Apical half of gaster infuscated (9) maculatus sansabeanus 



Buckley. 

 Whole gaster yellow 20 



20. Head brown or reddish. . (4) maculatus vicinus var. scmitestaceus 



Emery. 



Head black (10) maculatus sansaheanus var. torrefactus 



var. nov. 



21. Antennal scapes not flattened at the base ; tibise without long 



oblique hairs 22 



