Mr. R. E. Turner on Fossorial Hymenoptera, 289 
At the end of this paper I desire to express my thanks to 
Dr. Woodward and Dr. Andrews, of the British Museum, 
for the loan of the new preparations (executed by Mr. Hall), 
and to Dr. Andrews for some valuable help. 
Literature on Tritylodon. 
1. R. Owen. “On the Skull and Dentition of a Triassic Mammal 
( Tritylodon longevus, Owen) from South Africa,” in Quart. Journ. 
Geol. Soc. Lond. vol. xl. 1884, pp. 146-152. 
. H.G. Srertey. “On Parts of the Skeleton of a Mammal from Tri- 
assic Rocks (Theriodesmus phylarchus),”’ in Phil. Trans. 1888, 
pp. 141-155 (on Tritylodon, p. 154). 
3. H. F. Osporn. “ On the Structure and Classification of the Mesozoic 
Mammalia,” in Journ. Acad. Nat. Sci. Philad. 1888, pp. 186-264 
(on Tritylodon, pp. 213, 220, and 251 seq.). 
H. G. Sretny. “The Reputed Mammals from the Karoo Formation 
of Cape Colony,” in Phil. Trans. 1895, p. 1025-1028. 
H. F. Osporn. “ ‘the Origin of the Mammalia,” in ‘The American 
Naturalist, 1898, pp. 309-334 (on Tritylodon, pp. 828-829). 
. Broom. ‘On the Affinities of Tritylodon,” in Trans. South- 
African Phil. Soc. vol. xvi. 1905, pp. 73-77. 
Rt. Broom. “On Tritylodon and on the Relationships of the Multi- 
tuberculata,” in Proc. Zool. Soc. Lond. 1910, pp. 760-768, 
R. Broom. “ On the Structure and Affinities of the Multitubercu- 
lata,” in Bull. Amer, Mus. Nat. Hist. vol. xxxiii. 1914, pp. 115-1384. 
to 
SON Sy pore uae 
28 
EXPLANATION OF PLATE X. 
Fig. 1. The front part of the skull of 7irity/odon, showing the nares. 
Fig. 2, Molar tooth of Tritylodon with divided root. 
Fig. 3. 'Two molar teeth of Diademodon browni with undivided roots. 
Fig. 4. Two single-rooted V-shaped teeth of Diademodon, R. 3605 in the 
British Museum, the left with open and the right with closed 
pulpa. 
Fig. 5. Moles tooth of Cynognathus crateronotus with undivided root. 
XXXII.—Notes on Fossorial Hymenoptera.a— XX1X. On new 
Hthiopian Species. By RowLanp KH. Turner, F'.Z.5., 
F.E.S. 
Family Crabronide. 
Subfamily Bauzzcrvz. 
Bembex atrospinosus, sp. n. 
g. Niger; mandibulis basi, labro, clypeo, fronte inter antennas, 
orbitis, macula curyata utrinque infra ocellos, scapo subtus, 
flagello subtus pedibusque pallide flavis; femoribus tibiisque 
