43G Ml. Iv. E. Turner on Fossoi-'uil If^menoptera. m 



Abdomiiml fascia' narrow nnd pale ; sixth 

 veutral segment uot eniarjiinttte, 

 seventh dorfal sogmout not sinuate at 

 the sides B. ciirsi(a)ig, Ilandl. 



19. Sixtli ventral segment with a raised, 



rtattened, triangnhir tubercle 20. 



Sixth ventral segment with a low longi- 

 tudinal carina 2o. 



20. Clypeus pure white, with a black basal 



fflscia, sub oncwely truncate ante- " 



riorly ; apical joint of anteniiio 

 etrnngly bent and pointed, three irub- 



apical joints strongly spined B.Jlar'pcs, Sm. 



Clypeus and autennaj diftlring from the 

 above characters 21. 



21. Tubercle of second ventral segment not 



much curved, broadly truncate at the 



apex ■ 22. 



Tubercle of second veutral segment 

 strongly curved, pointed at the apex . 23. 



22. Abdomen j'ellow beneath; basal joint 



of the anterior tar.-i with eight spines. B. tubercidirenfris, Turn. 

 Abdomen black beneath; basal joint of 



the anterior tarsi with six spiuos .... B. mackuijensis, Turn. 

 2-3. Clypeus, scape beneath, and legs almost 



entirely yellow B. Uttorulis, Turn., var. 



Clypeus and legs mostly black, scape eu- 



'tiiely black 24. 



24. Eighth and ninth joints of the antenna) 



prominent behind , B. mnsca, Handl. 



Eighth and ninth joints of the antennae 



not prominent B, Uttorulis, Turn, 



25. Seventh dorsal segment broadly rounded 



at the apex ; abdomen entirely black . B. leemoinensis, Turn. 



Seventh dorsal segment narrower, trun- 

 cate at the apex, or t'ei'bly emarginate. 2C. 

 20. Abdominal fasciae interrupted, uot very 



broad B. variabilh, Sra. 



Abdominal fasciae continuous, very broad. B. rajdor, Sm. 



$?. 



1. Basal joint of the fore tarsus with twelv* 



or more spines 2. 



Basal joint of fore tarsus with six to eight 

 spines 3. 



2. Clypeus and labrum with a deep longi- 



tudinal groove on each side B.Jlavifrona, Sm. 



Clypeus almost, labrum quite without 



grooves B. pectmij)es, Ilandl. 



3. Discal area of the mesonotum marked 



with yellow 4. 



Discal area of the mesonotum without 

 yellow markings 11. 



4. Sixth dorsal segment with yellow mark- 



ings c . 



Sixth dorsal segment entirely black .... 10. 

 o. Abdominal fasciae very broad, occupying 



at least half the length of the segment. G. 



I 



