304 Natal Bees 
TETRALONIA BRUNNESCENS, Sp. nov. 
Q. Length hardly 11 mm., but very thick set. Similar to 7. 
fulvomarginata but smaller, with the following differences: Disc of 
mesothorax and scutellum with rather light chocolate coloured hair, 
narrowly surrounded by dull white, the scutellum with little white 
along posterior margin ; face, occiput, cheeks and sides of metathorax 
with white hair, but a tinge of brown on vertex behind the ocelli ; 
hind margins of abdominal segments strongly rufescent; first segment 
more closely and finely punctured, and its smooth apical margin 
narrower ; fifth segment with darker red hair. 
Malvern, Natal, January, 1916 (C. N. Barker). 
THRINCHOSTOMA, Saussure. 
Henmiales ns ei ee ys oe a he eee eee See ae Ee ie eee Eee Ib. 
1) Ey (a epee ie Lage aki teen SARE IRR RS errs Ua Wb A SSI RB ot coisa or 
1. First two abdominal segments red, broadly marked with 
black ; first recurrent nervure meeting second transverso- 
Peyt Loy ter) Manes qeivis Cy OMe MERI 3m PPR RG or SAS orb ors ics soaisniot acs 43 2. 
First two abdominal segments black, with the hind margins 
pallid ; first recurrent nervure joining third submarginal 
cell a short distance from its base................. millart, Ckll. 
2. Hair on inner side of hind basitarsi pale chocolate; wings red- 
dened, apical field not evidently dusky.....torridwm (Smith). 
Hair on inner side of hind basitarsi clear fulvous: wings 
with apical field strongly dusky............ nomiceformis, Ckll. 
3. Larger ; no patch of black hairs in submarginal cells.. ......... 
Ny a Us Reap eat AGA Sea GO cee cise er eae nomiceformis, Ckll. 
Smaller ; a conspicuous patch of black hairs in submarginal 
cells ee sc hae: seh aan meee dane Gite t oaoe me tamre trier millart, Ckll. 
7. millari is very distinct, but it is doubtful whether nomiaformis 
can be separated as a species from torridum. I have a torridum 
from Smith’s collection, and one from Durban (J. H. Bowker), is in 
the South African Museum collection recently submitted to me. 
These females differ from males of undoubted nomice/ormis (Malvern, 
Natal, April, 1917, C. N. Barker; Eshowe, 1916, H. W. Bell Marley ; 
Durban, 20th May, 1916, E. C. Chubb; and three from Mfongosi, Zulu- 
Jand, W. E. Jones), in the reddish wings without evident dark margin, 
——_ 
