Hymenoptera aculeata collected in Algertu: the Spheqidae. 123 
(It is odd that the cyanide, while reddening the yellow 
tints, seems to have had exactly the opposite effect on the 
ved—expelling it and leaving the surface yellowish! In 
certain lights, however, a slight difference in colour 
between the (originally) red and yellow areas can be 
recognised ; though there is no longer such a positive and 
striking contrast between them as is apparent in fresh 
specimens.) 
STIZUS HYALIPENNIS, Handl. 
if biskrao ok. vy, 9o.,,8. D. M. 
© 2. biskra, 2. v1.98. 1. 1D. M. 
The ¢ has unluckily lost both antennae, so I cannot 
appeal to their characters to support this identification. 
But the colour, and unclouded wings, seem sufficient 
evidence. 
STIZUS MARTHAR, Handl. 
1 ¢. Biskra, on Zizyphus lotus, 24. v, 94. A. E. E. 
1 9. Biskra, on Ammi visnaga, “ Eyes greenish, or 
glaucous,” 30. v, 93. <A. E. E. 
2 - 2. Biskra, on Ammi visnaga, 17. and 30. v, 97. 
A, E. E 
3 at Biskra, 28. and 31. v and 6. vi, 98. F. D. M. 
6 29. Biskra, 14. v to 3. vi, 98. F. D. M. 
STIZUS TUNETANUS, Costa 
ee Biskts, 24) ¥,98. FA DEM 
STIZUS ARENARUM, Handl. 
1 gf. Biskra, “about 8.30 a.m., “ Kyes olive-green,’ 
Bs, WL, Gos, A. E. E. 
i pt Biskra, on Zizyphus lotus, 29.iv, 95. A. E. E, 
1 #2. Biskra,14. v to 6. vi, 98. F. D. M, 
38 22. Biskra, 25. v and 6. and 9. vi. 98. F. D. M. 
STIZUS RAPAX, Handl. 
1 g. Biskra, on Amini visnaga, “Kyes light yellowish 
green or olive-green,” 28. v, 94. A. E. E. 
1 9. Biskra, among Tamaric near the barrage. ‘“‘ Hyes 
very light yellowish olive-brown.” 30. iv, 97. A. ELE. 
-sVGig fo. Biskray 122 y¥) to:20,.v,98.. FD: M. 
