344 HYMENOPTERA. 



This species, having the second submarginal cell petiolated, 

 would, by a rigorous adherence to the wing-system, be excluded 

 from the genus Larra ; but an examination of a large number 

 shows that in all the smaller species the second submarginal cell 

 has a tendency to become narrowed towards the marginal : in 

 L. tridentata the nervures frequently unite at their junction with 

 the marginal cell, and are sometimes even distinctly petiolated ; 

 under these circumstances the present species is retained in the 

 genus. 



27. LARRA FULIGINOSA. B.M. 

 Larra fuliginosa, Klug, Symb. Phys. dec. v. t. 46. f. 11 $ . 

 Hab. Egypt ; Gambia. 



28. LARRA FUSCIPENNIS. B.M. 



Female. Length 7-9 lines. Black : the head ferruginous, 

 with a fuscous stain above the insertion of each antenna, the 

 stain sometimes nearly obsolete ; the labrum, mandibles and 

 clypeus usually more or less yellow ; the antennae ferruginous ; 

 the flagellum very slender at the base. The prothorax, tubercles, 

 sides of the mesothorax, tegulae, scutellum and legs, ferruginous ; 

 in some examples, a large ferruginous spot beneath the wings ; 

 the head and thorax have a thin griseous pubescence, most dense 

 on the metathorax; the wings fuscous, their apical margins pale, 

 the nervures ferruginous. Abdomen delicately punctured, 

 shining, and having a violet iridescence, thinly covered with 

 cinereous pubescence, which is most dense on the basal segment; 

 the second and third segments have on each side a large yellow 

 macula ; the two apical segments ferruginous ; beneath, the two 

 basal and apical segments ferruginous. 



Male. This sex only differs in having the apex of the abdomen 

 less red. 



Hab. Port Natal. 



29. LARRA GRANDIS. B.M. 

 Stizus grandis, St. Farg. Hym. iii. 293. 2. 



Lucas, Explo. Sc. Alger. iii. 263. 1. 13. f. 8. 



Hab. Algeria. 



30. LARRA HIRTULA. B.M. 

 Male. Length 3 lines. Black: the labrum, clypeus, and 



scape in front, white ; a black spot in the centre of the clypeus ; 

 the flagellum fulvous beneath. Thorax : the posterior margin 



