Mv. R. E. Turner on Fossorial [h/menoptera. (59 



2. First abclomiual segment not constricted 



at the apex 3. 



First abdominal segment constricted at 

 tlie apex A. secernendus, Turn. 



3. Second ventral segment angular at the 



base ; black, the second abdominal 



segment red A. ruhrosirjnatus, Turn. 



Second ventral segment not angular at 

 the base ; otherwise coloured ........ A. rafomixtus, Turn. 



4. Ba.sal ai'ea of median segment smooth . , 5, 

 Basal area of median segment coarsely 



striated 6. 



5. Basal half of second dorsal segment 



orange A. ciliatus, Handl. 



Second dorsal segment whoUy black. ... A. perkinsi, Turn. 



6. Second dorsal segment marked with 



orange or yellow 7. 



Second dorsal segment wholly black . . 8, 



7. Tiiree basal dorsal segments broadly 



banded with orange at the apex .... A. targafus, Sm. 

 Three basal dorsal segments witli inter- 

 rupted yellow bands at the apex .... A, obesus, Turn. 



8. Scutellum, postseutellum, and bands of 



the abdomen bright orange A. chrysozonus, Turn. 



Scutellum and postseutellum black ; 

 bands of the abdomen yellow and 

 narrower , A. bellicosus, Sm. 



6 6- 



1. Basal area of the median segment 



smooth A. ciliatus, Hand.. 



Basal area of the median segment 

 striated 2. 



2. The two subapical joints of the flagellum 



at least more or less arclied beneath, 

 and subtuberculate or spiuose at the 

 apical angles ; ventral segments 4-6 



without long cili;e 3, 



The two subapical joints of the flagellum 

 not arched or subtuberculate beneath ; 

 ventral segments 4-6 usually with long 

 cilioe 5, 



3. Apical joint of the flagellum with a spino 



at tiie base ; abdomen black with yel- 

 low bands, first segment broad 4, 



Apical joint of the antennae without a 

 spine ; abdomen with the two basal 

 segments mostly orange ; first segment 

 narrow. A. sjnnicornis, Turn. 



4. Abdominal fasciae continuous, and on the 



five basal segments A. spiyi, Turi). 



Abdominal fasciae broadly interrupted, 

 and on the three basal segments only. . A. obestis, Turn, 



5. Scutellum more or less longitudinally 



striated 6. 



Scutellum almost smooth 6, 



