Some New Genera and Species of Hymenoptera.. - 251 



bordering tooth has a short blunt tooth attached to its base on the 

 outer side, outside are four irregular, but stout teeth. $ . 



Length 13 mm. 



Transvaal. 



Mandibles bidentate, the teeth large ; the subapical bluntly 

 rounded, apex of clypeus incised ; the third antennal joint twice 

 the length of the second, and distinctly shorter than the fourth. 

 Head and thorax closely, distinctly punctured ; the seventh abdo- 

 minal segment becomes, on the basal half, gradually, roundly 

 narrowed to the middle ; the apical half is distinctly narrowed 

 compared with the basal ; it is rounded and narrowed at the apex ; 

 the sides at the base are depressed ; the centre raised to a point 

 behind the middle, the apical portion of this central keel being thus 

 the larger ; both have oblique slopes. Fore coxae with stout, curved 

 spines ; the four apical joints of the tarsi are rufous ; the hair on the 

 under side of the tarsi fulvous. 



Megachile maeusa, sp. nov. 



Black ; the hair on the face, front, and thorax white ; the 

 abdominal segments banded with white pubescence ; the scopa 

 rufous, white at the base ; wings hyaline, the nervures black ; 

 tegulge fuscous. ? . 



Length 8 mm. ; breadth nearly 3 mm. 



Transvaal. 



Mandibles with two bluntly rounded teeth, the second smaller 

 than the first ; behind the second tooth they are broadly slightly 

 roundly dilated ; their middle deeply, widely grooved, the groove 

 widest at the apex ; outside it, on the apical half, is a narrower 

 furrow. Head closely, strongly punctured, less closely in the centre 

 of the clypeus, which has its apex depressed and clearly separated ; 

 it is transverse. Thorax closely, strongly punctured ; the metanotal 

 area coarsely aciculated. Abdomen closely punctured above, without 

 transverse furrows. The apical joints and the under side of the 

 basal of the fore tarsi are testaceous ; the hair on the legs cinereous ; 

 the spurs pale testaceous ; base of metatarsus two-thirds of the 

 width of the tibiae ; the metatarsus slightly shorter than the other 

 joints united. The mandibles, inside the furrow, bear elongate, 

 large punctures ; they are sparsely covered with pale hair. 



This species comes close to M. robertiana, which may be known 

 from it by the basal half of the mandibles being densely covered 

 with grey pubescence, the apical furrows are much less clearly 

 defined ; the apical two teeth more equal in size ; the apex of the 



