Hymenoptera aculeata collected in Algeria: the Sphegidae. 103 
frequents spots at the borders of bushes and under the 
ends of their branches.” 
1 gf. Bone, on Huphorbia paralias, 5. viii, 97. A. E. E. 
1 9. Le Tarf, “visitng heads of Cynara cardunculus,” 
23. vil, 96. A. E. E. 
1 9. Biskra, on Zizyphus lotus, 25. iv, 97, A. EK. E, 
229. Biskra, about Nitraria tridentata, 21, and 28. v, 
Bio SA Hie Be 
32d. Constantine, 15.‘and 17: vi, 98: -F: DM. 
1 g. Philippeville, 20. vi, 98. F. D. M. 
9 f f and 3 2 9. Biskra, 4. v. to 30. vi, 98. F. D, M. 
This is probably the commonest of all Zachysphex spp. 
in Algeria, occurring everywhere, and under all sorts of 
circumstances. 
TACHYSPHEX PSILOPUS, Kohl 
3 ¢ 2%. Biskra, “above the barrage. Eyes dull light 
yellowish green,” 4-18. iv, 97. A. E.E, 
ae a... Biskra, 5.'v and fv, 98, °F. D) Me 
TACHYSPHEX [EDUARDI], Saunders 
Described in Trans, Ent. Soc. 1910, Part IV. 
1 f. Biskra, on Zizyphus lotus, 30. iv, 95. <A, EK. E, 
24g. Biskra, “eyes light yellowish green,” 22. iv, 97. 
A. E. E. ‘ 
19. Bone, “visiting Zryngium triquetrum,” 6. vii, 96. 
A. E. E 
TACHYSPHEX PECTINIPES, L. 
19. Constantine, 16. vi, 98. F. D. M. 
It would seem that this extremely common European 
species is quite a rarity on the other side of the Mediter- 
ranean! (Kohl, however, mentions North Africa as one 
of its habitats, and this specimen was submitted to and 
its determination verified by him.) 
TACHYSPHEX GRACILITARSIS, Saunders 
Described in Trans. Ent. Soc. 1910, Part 1V. 
16 2 9. Biskra, 30. v to 9. vi, 98. F. D. M. 
Although the 2 @ were so abundant, I do not seem to 
have taken any $2, and I had very nearly the same 
experience in the same locality with the allied species 
ponzeri, The 29 are of course larger and more striking 
