Mr. R. E. Turner on Fossorial Tlymenoptera. 289 



At the end of this paper I desire to express my thanks to 

 Dr. Woodward and Dr. Andrews, of tlie 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 lojirjcevus, Owen) from South Africa," in Quart. Journ. 

 Geol. Soc. Loud. vol. xl. 1884, pp. 146-152. 



2. H. G. Seeley. " On Parts of the Skeleton of a Mammal from Tri- 



assic Rocks (Theriodesnius phylarchus)" in Phil. Trans. 1888, 

 pp. 141-155 (on Tritylodon, p. 154). 



3. H. F. OsBOBN. " On the Structure and Classification of the Mesozoic 



Mammalia," in Journ. Acad. Nat. Sci. Philad. 1888, pp. 186-204 

 (on Tritylodon, pp. 213, 220, and 251 seq.). 



4. H. G. Seeley. " The Reputed Mammals from the Karoo Formation 



of Gape Colony," in Phil. Trans. 1895, p. 1025-1028. 



5. H. F. OsBOBN. "4he Origin of the Mammalia," in ' The American 



Naturalist,' 1898, pp. 309-334 (on Tritylodon, pp. 328-329). 



6. R. Broom. "On the Affinities of Tritylodon," in Trans. South-' 



African Phil. Soc. vol. xvi. 1905, pp. 73-77. 



7. R. Broom. " On Tritylodon and on the Relationships of the Multi- 



tuberculata," in Proc. Zool. Soc. Loud. 1910, pp. 760-768, 



8. R. BiiooM. " On the Structure and Affinities of the Multitubercu- 



lata," in Bull. Amer, Mus. Nat. Hist. vol. xxxiii. 1914, pp. 115-134. 



EXPLANATION OF PLATE X. 



Fiy. 1. The front part of the skull of Tritylodon, showing the nares. 

 Fiy. 2. Molar tooth of Tritylodon with divided root. 

 Fiy. 3. Two molar teeth of Diadentodon broivni with undivided roots. 

 Fiy. 4. Two single-rooted V-shaped teeth oi Diadeuiodoti, R. 3605 in the 



British Museum, the left with open and the right with closed 



pidpa. 

 Fiy. 5. Molar tooth of Cynoynathus crateronotus with undivided root. 



XXXII. — Notes on Fossoriul Hymenojytera. — XXIX. On new 

 Ethiopian Species, hy Kowland E. Tuenek, F.Z.S., 

 F.E.b. 



Family CrabronidsB. 



Subfamily Bbmbecinm. 



Bemhex ativspiriosus, sp. n. 



cJ . Niger ; mandibulis basi, labro, clypeo, fronte inter antennas, 

 orbitis, macula curvata utriuqiie infra ocellos, scapo subtus, 

 tiagello subtus pedibusque pallide flavis ; femoribus tibiisque 



