264 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



1. Hair on outer side of hind tibise creamy white . ...A. zonata wkiteheadi Coekerell. 

 Hair on outer side of hind tibise red A. zonata buruensis Coekerell. 



2. Very large robust species, 18-21 mm. long, abdomen very hairy, not banded or 



spotted 3. 



Not so large, abdomen not thus hairy, usually banded 4. 



3. First two abdominal segments with pale fulvous hair, those beyond with dark. 



A. hilgendorfi Coekerell. 

 Abdomen covered with pale grey hair; tibial scopa bright fulvous. 



A. venerabilis Coekerell. 



4. Abdomen with lateral white spots of hair, or interrupted bands. 



A. robbi Coekerell. 

 Abdomen not so marked 5 : 



5. Hair of thorax above orange-fulvous, not mixed with black or fuscous. 



A. retusiformis Coekerell. 

 Hair of thorax above mixed with black or fuscous 6. 



6. Hair of hind tibiae red above and black below; of thorax above red; tegulse red 



(Khow Sai Dow Mountain, 1,000 feet, Lower Siam, Feb. 1899, W. L. Abbott). 



A. sp. (probably new, but condition too poor to describe). 



Hair of hind tibise above not red 7. 



7. Second abdominal segment with much erect pale hair 8. 



Second abdominal segment without such hair 9. 



8. Mandibles (male) with a large yellow spot A. fulvitarsis Brull6. 



Mandibles (male) without a yellow spot A. melanognatha Coekerell. 



9. Tuft of hair behind wings clear strong fulvous; flagellum red beneath. 



A. savignyi Lepeletier. 

 Tuft of hair behind wings pallid, not distinctly if at all fulvous 10. 



10. First abdominal segment covered with pale hair; face without light markings. 



A. eversa Coekerell. 

 First abdominal segment not so covered; clypeus with light markings. ...... 11. 



11. Larger; flagellum dark A . confusa Smith. 



Smaller; flagellum red beneath A. savignyi Lepeletier, variety. 



