Hymenoptera. 413 



I'Bteral ones ; the central and outer etnarginations are larger than 

 the inner lateral : they are rounded, the central being larger and 

 deeper than the others. 



Front not depressed ; there is a narrow, deep furrow down 

 the centre ; the keels on the top are narrow, not vary distinct, 

 rounded. Allied apparently to H. monochroa, Mocs. 



Tetrachrysis dalyana, nov. sp. 



Green, the vertex behind the ocelli — the mark widened be- 

 hind. — the basal half of the middle lobe of the mesonotum, base 

 of scutellum in the middle, the curved furrows on the centre of 

 the metanotum and the base of the 2nd and 3rd abdominal seg- 

 ments to near the middle indigoblue, the 2nd keeled down the 

 middle from the base to the apex ; the green on the sides of the 

 head, thorax and abdomen is largely tinged with brassj . Wings 

 fuscous violaceous, paler towards the apex. Female. 

 Length 10 mm. 



Grahamstown (^Misses Daly and Sole). 



Hair on head, pleurae and legs long, dense and white. Anten- 

 na! scape brassy green, the basal 2 joints of th« antennae of a 

 duller green. The keel over the front is curved ; in front it is broad 

 and smooth and a few smooth projections run down from it, the 

 central being the widest, longest and most regular. The raised, 

 central part of the face is impunctate. Mandibles green at the 

 base, the rest black, tinged with violet. The centre of the middle 

 .obe of the mesonotum at the base and the apical half are violet- 

 coloured. The 2 curved depressions on the metanotum ai-e deep, 

 wide ; there are 2 stout keels at the base of the middle and one at 

 the apex. There is a distinct keel on the centre of the 2nd seg- 

 ment, extending from the base to the apex ; there is an indication 

 of a keel on the 3rd ; the apical foveae are large, but not very 

 clearly defined ; the central incision is distinctly smallei- than the 

 lateral : the teeth are distinct. 



A broad stout species. It comes close to T. kloofensif; ; it is 

 larger and may readily be sepai-ated b} the metanotal oblique fur- 

 rows not ending in 2 large foveae. 



