Hymenoptera aculeata collected in Algeria: the Sphegidae. 79 
band of abd. segm. 3 scarcely at all emarginate, but 
practically covering the whole segment: also the basal band 
on segm. 2 is not broken into two spots but entire. Head 
with two little oblique yellow streaks or spots between 
the ocellar region and the tempora. In this form the 
body above is punctured much less closely than in that 
previously described, and its surface conspicuously more 
shining. The apical teeth and tubercles of the clypeus 
seem also to be more strongly developed; when the 
mandibles are opened, it appears from certain points of 
view actually “sexdentate”! 
12 Biskra;' 6. vi, 98: F:D. M. 
b. This agrees with the last-mentioned form in its 
shining and comparatively sparsely punctured surface, and 
(I think) as to clypeus-characters (but unluckily in Mr. 
Eaton’s only specimen the mandibles are closed!). Its 
coloration is very peculiar. The thorax shows no red at 
all, not even on the sides of the propodeum. On the 
other hand the 2nd abd. segment is not black and yellow 
but entirely red like the first! The yellow bands on segm. 
3 and 5 are deeply emarginated. The tibiae within are 
black-marked, and the head above is immaculate. 
1. 2 Biskra, 31. v, 97, on Ammi visnaga. A. E. E. 
Except as stated, the characters of these two specimens 
agree with those of the 2 described previously. Accord- 
ingly, whatever view be taken of their relation to signs, 
they certainly belong to the same group with it, viz. that 
of bupresticida. 
CERCERIS FISCHERI, Spin. (?) 
Fischeri, like tricolorata, seems to be an insect of which 
nothing is known except from Spinola’s description. From 
what he tells us it would seem that the two species differ 
very little in colour, but are certainly distinct by the 
structure of the front coxae in both sexes, those of jischeri 
having a remarkable spine-like (cuneiform?) production or 
dilatation outwards, while those of ¢ricolorata are normal. 
He mentions, too, that in fischeri the cordiform area has 
a distinct impression bisecting it longitudinally, which is 
not the case with the other species. 
Both these characters distinguish the two ? ? now to be 
considered from those referred above to insignis, of which, 
as has been said, I believe ¢ricolorata to be a synonym, 
