Mr. R. E. Turner on Fossorial Hymenoptera. 277 
In another (tig. C, 7) the point of the anterior blade passes 
just behind tie apex of the lobe. In a third the blade slides 
altogether behind the lobe, so that the latter practically 
reaches the posterior cusp of the last premolar, blocking the 
space between it and the carnassial, as is typically the case 
in species of Felida in which the lobe of the upper carnassial 
is well developed (fig. D, 2). 
Fronto-squamosal Junction. 
In a series of twelve skulls of F. bengalensis the frontal 
bone is separated from the squamosal by a bridge formed by 
a downward process from the parietal meeting the upper end 
of the alisphenoid. This appears to be the general rule in 
the Felide. In an example of F. manul, however, the 
parietal is excluded from the alisphenoid by the junction of 
the frontal with the squamosal. One would, perhaps, be 
inclined to regard this character as a useful and reliable 
- systematic point, were it not that in &. sylvestris the junction 
of the bones at this point isa highly variable feature. Some-. 
times there is a tolerably broad parieto-alisphenoid bridge 
between the frontal and squamosal. At other times the 
bridge is quite narrow ; at others it is obliterated altogether 
by the union of the frontal and squamosal. 
XX XI.—Notes on Fossorial Hymenoptera.z—X XIII. On some 
Australian Genera. By Rowuanp KE. Turner, F.Z.S., 
F.E.S. 
Family Crabronida. 
Subfamily Parranryi2. 
Cerceris gilberti, sp. n. 
2. Nigra; mandibulis basi, clypeo, scapo, fronte sub antennis, 
macula magna pone oculos, pronoto macula magna utrinque, 
tegulis, scutello linea transversa, postscutello pedibusqne flavis ; 
flagello, segmentis dorsalibus secundo basi, tertio quintoque, 
segmentisque ventralibus secundo, tertio, quinto sextoque brunneo- 
auriantiacis ; clypeo lamina libera, porrecta, brevi, apice emargi- 
nata; mesopleuris haud dentatis; segmento mediano area basali 
Ann. & Mag. N. Hist. Ser. 8. Vol. xviii. 19 
