XXVI. PEMPHREDON. 197 
The ¢ differs only in having the face covered with a silvery 
pubescence, and the dorsolum appears coarsely punctured instead 
of rugose. 
& @ in my own and other Collections. 
+4:+ Very common, inhabiting posts and rails. It sup- 
plies its young with Aphides. I have never seen it con- 
struct its own cell, but consider it very probable, from the 
structure of its mandibles. 
Sp. 2. Lucruosus. N. Sp. 
ater, pubescens, marginis metathoracis summo tantum levi, abdo- 
minis petiolo longo. 
length 3% lines. 
Entirely black: head very pubescent, deeply punctured and 
shining ; clypeus covered with a silvery down. 
Thorax very pubescent and punctured; peristethium trans- 
versely wrinkled ; metathorax rugose, the subcordiform space 
at its base enclosed by an elevated smooth and very shining ridge ; 
wings hyaline, their nervures piceous. 
Abdomen having the petiole rugose, with a central longitudinal 
channel and longer than the remainder of the first segment, the 
terminal segments hirsute ¢. 
¢ in my own Collection. 
+1; The solitary specimen from which I have drawn 
the above description I took in Battersea Fields. Although 
anique, the remarkable difference in the sculpture of the 
metathorax admits of my considering it a distinct species ; 
for the value of this character is exemplified throughout 
the Fossores, in species where there is no lack of speci- 
mens to corroborate it, and in which it is never found to 
vary. 
