XVIII. NYSSON. 101 
+47 The name of this species is bad, being derived from 
a generic character, viz. the spines upon the metathorax ; 
but this Fabricius did not know, as he placed it in his 
magazine Crabro. Although much like the following 
species, it is readily distinguished from it by its compara- 
tively greater length of antennz and more slender habit. 
These are characters which have not been before noticed, 
and I therefore suspect that there is much confusion in the 
synonymes; I have retained them nearly as they were 
applied by the several authors. It is common in June in 
many parts; the ¢ I once took, in considerable numbers, 
at Coombe; the ¢ I have never found so common as the 
next species, nor have I taken her with her prey. 
Sp. 2. INTERRUPTUS. Latr. 
niger, antennis paulo capite longioribus, abdomine fasciis tribus 
flavis. 
length 3¢— 42 lines. 
Latr. Hist. 13. 306. 3; Nouv. Dict. 23. 161. 
Nysson sealaris. Illig. 2. p. 157. 
Black: head pubescent, punctured ; the clypeus with a silvery 
down; antennez a little longer than the head. 
The thorax punctured, pubescent; collar and tubercles yellow; 
a small space at the base of the metathorax regularly striate ; 
tegulze testaceous ; wings fuscous, their nervures piceous; legs 
red, with the coxe, trochanters, and femorz, except their apex, 
black ; the mesothorax silvery beneath. 
The abdomen finely shagreened, the two first segments with 
deeper, dispersed punctures, and the margin of the three first 
having each a yellow fascia, interrupted in the first and attenu- 
ated in the centre of the other two; the fasciz frequently all 
entire @. 
The ¢ scarcely differs, the silvery pubescence alone of the 
clypeus and lower part of the mesothorax being denser, and the 
antennze somewhat shorter. 
& 2 in most Cabinets. 
