Hymenoptera aculeata collected in Algeria: the Sphegidac. 69 
yellow mandibles, while in these insects the 2 mandibles 
are also more or less yellow (in some specimens very 
distinctly, in others somewhat obscurely). Notwithstand- 
ing, I feel sure they are Gribodo’s species. 
The gf seem to me identical with that described by 
Saunders in Ent. Mo. Mag., 1904, p. 202, under the name 
gractlipes (vide his account of the intermediate metatarsi 
and the antennae—the serrated appearance of the latter 
beneath is caused partly by a slight excavation of the two 
penultimate joints !). 
The species is larger than minutus—about the size of 
tristis; and, as in that species, the face of the 2? is very 
broad in proportion to its length. The clypeus in this 
sex is widely and arcuately emarginate, (the exterior angles 
of the emargination very prominent and tooth-like,) and 
has another curious character which might easily be 
overlooked. It bears several longish scattered projecting 
hairs, two of which—one on each side just above the 
“teeth ””—are excessively long (though so thin as to be 
almost invisible except in certain lights) and project 
straight forward far beyond the others—they are actually 
almost as long as the scapes of the antennae! In both 
sexes the vertex and mesonotum show under the micro- 
scope a regular reticulate aciculation, and are also very 
closely punctured (hence the surface appears opaque). 
Mr. Eaton records no plants as visited by this species. 
His examples seem to have been all taken on sand or 
roadside banks. 
ta ams. 2h xn, 93. Ack, Ki: 
1 ¢. Biskra; 17. iv, 94. <A. H. E. 
43S. Bone, 29. 11 to 23. v, 96. A. HE. E. 
19. Alger, 25. 11, 93. A. E. E. 
1 2. Béne, 28. xi, 93. A. E. E. 
Bed gue ye) Alger, 16i 1 to 2h. 1v;°98.) °F De M. 
DIODONTUS AFER, n. sp. 
This insect appears to me so very distinct from anything 
I can find described that I venture to bring it forward as 
new, though rather unwillingly, as it is a single specimen. 
The head, thorax, propodeum, and first abdominal 
segment are all exceedingly shining, and contrast most 
strikingly with the remaining abdominal segments, which 
are absolutely dull. 
