208 Annals of the South African Museum. 



G-ORYi'Hus AELLO, sp. nov. 



9 ouly. A dull and slender, pale testaceous species with the 

 flagellum except its subapical white band, and ocellar region, alone 

 black ; hind tarsi and terebral valvulae iufuscate ; head except frous, 

 pleurae and freuum stramineous ; terebra half length of abdomen. 

 Recognised by its very strongly convex clypeus, evenly punctate face, 

 elevated orbits which extend to either side of ocelli, the longitudinally 

 sulcate central mesonotal lobe. In all other respects, especially the 

 metathoracic structure, it agrees exactly with G. Celoeno, of which I 

 cannot consider it the opposite sex. Length, 8 mm. These two species 

 have nothing in common with Plesiocryptus carinifrons, Cain. (Zeits. 

 Hym.-Dip. iii, 190o, p. 300, $ =Bathy crisis striaticollis, Cam. Spolia 

 Zeylanica, iii, 1905, p. 97, J ) for, though equally elevated, the orbital 

 structure is entirely different. 



W. E. Jones found the type during May, 1916, at Mfougosi in 

 Zululand. 



MESOSTENUS, Gravenh. ' 



MESOSTENUS BHODESIAE, Cam. 

 Ann. S. Afr. Mus. v, 1906, p. 145, ? . 



(J 9 Areolet small and quadrate, very slightly broader than high' 

 apically subpellucid, emitting recurrent nervure from its centre ; lower 

 basal nervure always a little autef urcal ; uervellus strongly postfurcal 

 and geuiculate a little above its centre, at junction of the strong 

 spurious uervure. Notauli remarkably deeply impressed. The un- 

 described $ differs only sexually. Several examples of both sexes 

 were found by W. E. Jones during May, 1916, at Mfougosi in 

 Zululaud. 



MESOSTENUS DENTICLYPEUS, sp. nov. 



c $ . A slender, rich testaceous, shining species with the head, 

 antennae, onychii, terebra and in J 1 central mesonotal lobe, deep 

 black ; face, mouth, cheeks, all the orbits broadly and the fiagellar 

 band, white. Head large and buccate, posteriorly as broad as the 

 eyes ; occiput and frous glabrous and mutic ; face and clypeus sparsely 

 punctate, the latter elongately dentate centrally and emargiuate on 

 either side. Thorax shining and subglabrous with notauli deeply 

 impressed and petiolar area closely punctate ; both metauotal traus- 

 cariuae strong, the apical curved ; apophyses wanting, spiracles elon- 

 gate and not small. Scutellum deplauate, smooth and not laterally 

 margined. Abdomen narrow, dull and closely punctate ; basal 

 segment linear with slightly prominent spiracles a little beyond its 



