- 
86 Rev. F. D. Morice on 
It is certainly nothing else known to me. It is not 
subimpressa, nor rulida; and though several antiquated 
and altogether imperfect descriptions might be strained 
into more or less agreement with it as far as colour- 
characters are concerned, I think it is really useless to 
consider seriously to which of these it might with least 
improbability be referred; and believe that an erroneous 
identification of a species already described is likely to 
cause more trouble to future systematists, than the re- 
description of it under a new name, which can be “sunk,” 
if necessary, hereafter as a synonym. 
1 f. Biskra, on Zizyphus lotus, 30. iv, 95. A. E. E. 
1 f, 19. Biskra, on Zizyphus lotus, 14. v, 97. A. HE. E. 
2 ¢ g. Biskra, on Ammi visnaga, 17. and 20. v, 97. 
A. E. E. (One of these a dwarfish specimen, hardly 
6 mm. long !) 
1 g. Biskra, “on the wing,” 7. v, 97. A. E. E. 
CERCERIS KOMAROVII, Rad. 
This very remarkable species seems to be quite common 
at Biskra. The 2, I believe, is still undescribed. As 
might be expected, it has not the dentate tempora of the 
?; but in colour and general appearance resembles it 
almost exactly, except that the yellow markings on its 
mesonotum are narrower than is usual in the §, which 
sometimes has them dilated to such an extent that prac- 
tically the whole area appears yellow—much as in Judea. 
I should describe it as follows— 
gd. Structura maribus priscae et capitonis valde affinis. Color, 
ut in ?, pallide citrinus ; mandibulae apice et parce vertex nigro- 
maculata: mesonotum nigrum citrino 4-vittatum: Alae hyalinae, 
apicibus infumatis. 
Clypeus haud dentatus, convexus, antice late deplanatus. An- 
tennae apice subtruncato uncinatae; harum articulus ultimus 
incurvatus, basi subtus (cum parte apicali articuli penultimi) 
rotunde excavatus. Collare in medio impressum, lateribus callosis. 
Segmenta abdominis dorsalia 1-5 in medio, ante apices saltem, 
(nonnunquam a basibus ad apices,) lineis impressis vel foveolis plus 
minusve elongatis incisa. Segmentum 1™™ vix petioliforme, 2° non 
multo angustius. Segmentum ventrale 2°" basi haud elevatum : 
5™" in medio a basi ad apicem semilunariter impressum, (are 
impressa pilis stratis curvis ita obtecta, ut credat aliquis segmentum 
ipsum profunde emarginatum esse :) 6" quinto haud dissimile, sed 
