Mymenoptera aculeata collected in Algeria. 543 



The specimens which I refer to the <j> of this beautiful little 

 species, appear to agree exactly with Klug's figure in Symbols 

 Physicx, and are easily recognizable from the other silvery-coated 

 species with black apical spots to the wings, by the nearly triangular 

 2nd submarginal cell, the inner nervure of which is quite straight, 

 almost as long as the posterior nervure, and is directed backwards 

 towards the base of the wing ; the outer nervure is much shorter, 

 also quite straight, and runs at right angles to the costal margin. 

 The apex of the cell, where these two nervures almost unite, is situated 

 close to the base of the marginal cell, which is short and subtri- 

 angular ; both the recurrent nervures of the 3rd discoidal are emitted 

 from the 2nd submarginal, and diverge in lines almost identical with 

 those of that cell, so that the 3rd discoidal looks almost like a copy 

 of the 2nd submarginal, except that its inner margin is angulated so 

 that it forms a pentagon ; in both cases, especially in that of the 3rd 

 discoidal, the cells look as high or higher than wide ; claws bifid on 

 all the legs. Amoenus, Klug, must be another closely-allied species, 

 so far as its neuration would suggest, but according to the figure in 

 the Symbols it has no metatarsal comb on the front legs. 



A single £ which I think no doubt belongs to the above resembles 

 it in coloration, only the silvery pubescence is not quite so dense, 

 the abdomen is dark towards the apex, and only slightly silvery 

 pubescent. The neuration of the wings is rather darker, and the 

 2nd submarginal and 3rd discoidal cells are less elongately triangular 

 and less similar to each other in shape, the 3rd discoidal being con- 

 siderably wider at the base. The antennae are black, the joints of 

 the flagellum from the 2nd upwards subequal, posterior margin of 

 the pronotum angulated as in the 9 , legs testaceous, tibiae outwardly 

 and tarsi fuscous, posterior metatarsus as long as the two following 

 joints together, inner colcar of hind tibiae hardly longer than half 

 the metatarsus. Apical ventral valve of abdomen somewhat parallel 

 sided, truncate at the apex, with a central carina. 



Pompilus {Aporus) FRIESEI, n. sp. 



Caput et thorax nigra, aureo-argenteo micantia, abdomen rufotes- 

 taceum ; fiagelli articulus secundus tertio paullo longior : prothoracis 

 margo posticus angulatus, alse lacteo-hyalinae, macula magna nigra 

 apicali ornatae pedes run, unguiculis ad basin angulato-dilatatis 

 et seta valida prope basin dilatationis usque ad apicem extensa 

 armatis. 



Closely allied to gracilis, Klug, with much the same coloration, 

 but with the abdomen and legs of a brighter, more rufescent colour, 

 and the head, thorax and antennae black, the two former and basal 



