XXI. CRABRO. 155 
the mandibles black and piceous at their apex; the palpi 
piceous. 
The thorax black, minutely and closely punctured ; the dor- 
solum with two central parallel slightly elevated lines at its base, 
extending to the disk, and two lateral ones much shorter ; the 
metathorax with a cruciform consute incisure, the transverse 
one somewhat curved, and enclosing the anterior portion of the 
metathorax, which is very convex, somewhat obliquely striate, 
and its posterior portion transversely ; the tegulz piceous; the 
wings slightly iridescent, hyaline, their nervures piceous ; the 
legs black, the anterior and intermediate femora yellow in front, 
as well as the anterior tibiz ; the calcaria testaceous. 
The abdomen subclavate, black, and shining; tie dorsal 
margin of the two basal segments constricted ¢. 
I do not know the 2, but the following is Van der Linden’s 
description of its difference from the g: “ Legs black, except- 
‘ing the inside of the anterior tibia, which are yellow.” 
é in my own and other Cabinets. 
+4-+ This is not uncommon in the vicinity of London. 
Sp. 17. wurerparpis. St. Farg. 
niger, elongatus, metathorace antice oblique striato, mandibulis, 
palpis et tibiis quatuor anticis subtus flavis 3. 
length 21—3 lines. 
Crossocerus luteipalpis. St. Farg. 3. 785. 23. 
Black: head shining, punctured; the stemmata placed in an 
equilateral triangle on the vertex, a minute longitudinal impres- 
sion between the two posterior ones, which scarcely passes them ; 
the scape of the antennz yellow laterally ; the clypeus, internal 
orbits and cheeks, covered with a dense silvery pubescence ; the 
mandibles and palpi yellow, the former rufescent at their apex. 
The thorax shining and punctured; three longitudinal lines 
running from the collar to the disk of the dorsolum; the two 
lobes of the subcordiform base of the metathorax very convex 
and longitudinally striated, the space beyond forming the trun- 
