Tribe Pemphredonini


1 Forewing with two recurrent veins and three discoidal cells; stigma small or moderate in size

2

 

1 Forewing with one recurrent vein and two discoidal cells, rarely one; stigma large

 

3

 

2 Episternal sulcus well developed, extending from subalar fossa to hypersternaulus and beyond; hypersternaulus horizontal; hindtibia without spine series on posterior margin

 

Passaloecus

 

2 Episternal sulcus incomplete, not evident between subalar fossa and hypersternaulus; hypersternaulus rising obliquely posterad; hinditibia with a series of spines posteriorly

 

Pemphredon

 

Cemonus

 

3 Gaster in dorsal view with petiole much longer than wide

Stigmus

 

3 Gaster in dorsal view with petiole indistinct or no longer than wide

4

 

4 With no more than one submarginal cell

Xysma

4 With two closed submarginal cells

Spilomena

 

Key Main