70 PERCY SLADEN TRUST EXPEDITION. 
2. Koptorthosoma caffrum, Linn. 
Xylocopa caffra, Smith, Trans. Ent. Soe. 1874, 258. 
Koptorthosoma caffra, Vachal, Miscell. Ent. vii. 27. 
Xylocopa caffra, Pérez, Ann. Soc. Ent. Fr. lxiv. 1895, 205. 
Locality. Seychelles, Mahé (De Gaye). Common. An abundant species in Central 
and South Africa. 
3. Halictus mahensis, sp. nov. 
Black; the basal two or three segments of the abdomen broadly on the sides and the 
legs, except the fore coxze, deep rufous. Wings almost hyaline, the stigma and costa dark 
fuscous, the nervures blackish; tegule piceous; the metanotal area with a narrow 
striated band at the base, the middle with twisted strize which reach near to the apex. 
Abdomen smooth, impunctate; the base of the segments with a pubescent band ; 
probably also the apex in fresh specimens. Anal rima piceous. Collar with a band of 
depressed white pubescence which curls round the tubercles; the part under the pile 
is rufous. Head and thorax alutaceous; the clypeus with distinct scattered punctures, 
its apex fringed with golden hair. Middle of mandibles broadly rufous. The head 
is longish, flat; the face distinctiy raised in the middle; the eyes converge above 
distinctly. Postseutellum thickly covered with pale pubescence. 
The male has the apex of clypeus broadly white; the middle joints of the antennze are 
nodose; the legs are paler in colour, and the four anterior femora may be broadly black. 
The metanotum is bordered laterally by a distinct keel on the apical slope; its middle 
is furrowed, keeled below. ‘The first recurrent nervure is interstitial; the second and — 
third abscisse are almost equal in length. The amount of red on the basal segments 
of the abdomen varies, so does also the amount of black on the legs; in one male 
the femora and tibize are black. In all the specimens the wings are very iridescent ; 
some have them darker coloured than others. 
Locality. Seychelles, Mahé. Common. 
4, Megachile disjuncta, Fabr. 
Apis disjuncta, Faby. Syst. Ent. ii. 328. 
Megachile disjuncta, Bingham, Fauna of Brit. India, Hymen. }. 480; Pérez, Ann. Soe. Ent. Fr, 
Ixiv. 1895, 206. 
Locality. Three specimens from Seychelles, Mahé. Commonin India. Recorded also 
from Mauritius. 
5. Megachile mystacea, Fabr. 
Apis mystacea, Fabr. Syst. Ent. 385. 
Megachile rufiventris, Guér. Voy. Bélanger, Zool. 502 ; Pérez, Ann. Soc. Ent. Fr. Ixiv. 1895, 206. 
Megachile mystacea, Bingham, /. c. 479. 
Localities. Seychelles, Mahé, Praslin. Common. Port Louis, Mauritius. 
It is known also from East and South Africa and from Rodriguez. 
