120 
APPENDIX. 
Trypoxylon ATTENUATA. 
Female (length 3^ lines). Black: very delicately punctured ; 
an impressed line extending from the anterior ocellus lo the apex of 
the prominence between the basal joints of the antennae ; the clypeus 
clothed with silvery pile : thorax sub-opaque ; at the base of the 
metathorax is a semicircular enclosed space, evenly and divergently 
striated ; down the centre is a longitudinal depression widest at the 
apex, it is continued from thence to the apex of the metathorax, 
towards which it gradually becomes narrower ; the wings splendidly 
iridescent, and slightly clouded towards their apical margins : ab- 
domen shining, the three basal segments scarcely constricted ; the 
basal one as long as the second and third united, and having a deep 
channel above extending half its length from the base. 
The male corresponds with the female both in colour and sculp- 
ture, exhibiting only the usual sexual differences. 
Hab. — Bristol. 
Crabro lapidarius, Fab. 
Female (length 4 lines). Black; the head large, quadrate, as 
wide as the thorax, deeply and coarsely punctured ; the stemmata 
placed in a triangle, the posterior pair in a line with the apical 
margin of the eyes, the clypeus densely covered with silvery pile 
and having a central longitudinal carina ; the basal joint of the an- 
tennae yellow, and having towards the base within, an elongate 
brown stain : the thorax above is coarsely punctured, the punctures 
confluent, the scutellum strigose, the metathorax rugose, and having 
a central longitudinal impressed line, which is transversely striate ; 
the collar has a yellow spot on each side, and the tubercles, tibia?, 
anterior and intermediate femora towards their apex, and basal joint 
of the tarsi are also yellow ; the posterior femora have an elongate 
yellow stripe beneath ; the apical joints of the tarsi rufo-fuscous ; 
the tegulae piceous, wings hyaline : the abdomen is elongate-ovate ; 
the three basal segments have a broadly interrupted yellow band, 
the fourth sub interrupted, and the fifth entire ; beneath rufo- 
piceous. 
Hab. — Weybridge. 
This insect may prove to be the female of the Crabro clypeatus ; 
it was captured near the same spot where that species occurred. I 
think it must be the lapidarius of Fab. 
