STUDIES m THE FOSSORIAL WASPS. 727 



Key to the Species 0/ Anthobosca. 



Females. 



1. Species from the Old World 2. 



South- American species 23. 



2. Australian species 3. 



African and Arabian species 16. 



3. Tarsal ungues with a lobe at the base either rounded 



or pointed 4. 



Tarsal ungues without a basal lobe, deeplj' bifid li. 



4. lladial cell pointed at the apex 5. 



Radial cell blunt at the apex 6. 



5. Pubescence black, calcaria black, abdomeu wholly 



black A. australis Sicliel. 



Pubescence whitish, calcaria white, abdomen usually 

 with a yellow spot on each side of the third dorsal 

 segment A., signata '^xa. 



6. Wings short, the length of the costa of the fore wing 



not exceeding two and a half times the breadth of 

 the mesonotum. Pronotum, median segment, and 

 three basal abdominal segments rufo-testaceous ... A.fashwsa Sni. 

 Wings longer, the length of the costa of the fore 

 wing three times as great as the breadth of the 

 mesonotum. Thorax and abdomen black 7. 



7. Antennaj orange ; stigma about three times as long- 



on the costa as broad A. flavicornis Hanss. 



Antenna) black or fuscous ; stigma scarcely more 



than twice as long on the costa as broad 8. 



8. Legs bright ferruginous 9. 



Legs black, sometimes fusco-ferruginous beneath ... 10. 



9. Second abscissa of the radius no longer than the 



third; first recurrent uervure received just before 



the middle of the second cubital cell A. cognata Sm. 



Second abscissa of the radius longer than the third; 

 first recurrent uervure received at one-quarter from 

 the base of the second cubital cell A. strandi Turn, 



10. Wings fuscous ; four basal abdominal segments with 



ciliae of white scale-like hairs 11. 



Wings hyaline or subhyaline ; abdominal segments 



without cilite of scale-like hairs 12. 



11. Pronotum and scutellum strongly punctured A. albopilosa Turn. 



Pronotum and scutellum sparsely and very finely 



punctured A. argenteocincta Grib. 



12. Third cubital cell nearly as long on the radius as on 



the cubitus or longer ; first recurrent uervure 

 received slightly beyond the middle of the second 



cubital cell A. antliracina Sm. 



Third cubital cell much shorter on the radius than 

 on the cubitus; first recurrent nervure received 

 well before the middle of the second cubital cell ... 13. 



13. Front punctured; legs wholly black ; length 11 mm. A. ^lnicolo)' '&m. 

 Front smooth and shining ; legs fusco-ferruginous 



beneath ; length 7 mm A. lavifrons Sm. 



14. Abdomen black; second and third cubital cells each 



receiving a recurrent nervure 15. 



Abdominal segments 2-4 very broadly rufo-testaceous 

 at the base; second cubital cell receiving both 

 recurrent nervures A. clypeata Sm. 



15. Sixth dorsal segment strongly striated at the base ; 



radial cell detached from costa for half its length . A. nuhilipennis Turn. 

 Sixth dorsal segment punctured : radial cell detached 



from costa at extreme apex only A. occipitalis Turn, 



16. Radial cell subacute at apex ; abdomen not marked 



with yellowish white 17, 



Radial cell broadly rounded or narrowly truncate at 



apex; abdomen m.arked with yellowish white 20, 



