Hymenoptera aculeata collected in Algeria. 545 



next two joints together, bearing three long piceous spines ; claws of 

 all the legs bifid or toothed, posterior tarsi spinose ; abdomen with a 

 slight silvery pile, the first three segments red, the remainder black, 

 apical segment above and below with a few fine hairs. 

 Long. 10-11 m.m. 



This species has much the coloration of the others of 

 this group, but is quite distinct in the structure of the 

 thorax. 



? 4. Biskra, 28. iv. to 29. v. 98. A. E. E. and F. D. M. 



$ 1. on Ammi visnaga, 25. v. 97. A. E. E. 



POMPILUS (Aporus) ARGYRELLUS, Klug. 



? 2. Biskra, 5. vi 97. A. E. E. These 2 ?, which I 

 refer to the above, have the 1st and 2nd sub- 

 marginal cells subequal, and in this respect 

 seem to agree with Klug's figure. The entire 

 insects are covered with sheeny grey-white 

 pubescence, which in certain lights gives 

 exactly the effect of the bands on the abdomen 

 represented by Klug. The anterior tarsi are 

 somewhat pale. 



POMPILUS (ApOTUs) FUMIGATUS, Klug. 



t 1. Bone, 30. vii. 97. A. E. E. 

 $ 2, ? 4. Biskra, 4. v. to 23. v. 97. 98. A. E. E. 

 and F. D. M. 



POMPILUS (Aporus) MELANURUS, Klug. 



? 1. Bone, 7. viii. 97. A. E. E. This and the 

 preceding species have both the long 2nd sub- 

 marginal cell as in argy reikis, Klug. 



POMPILUS (Evagethes) CINERASCENS, n. sp. 



Caput et thorax nigra dense argenteo-sericea, illud macula flava 

 minuta orbitali utrinque notatum, alis dilutissime infuscatis, fascia 

 apicali fusca ornatis cellulis cubitalibus duabus instructis, pedibus 

 plus minus testaceo variegatis metatarsis anticis spinulis brevissimis 

 armatis. Abdomen testaceum albido sericeum, segmentis tribus 

 apicalibus nigris. 



^ . Head and thorax black, densely clothed with a bright silvery - 

 white pile ; mandibles red at the base with a few bristly hairs ; 



