XX1V. DIODONTUS. 185 
scription treats the P. lugubris as the type of the genus 
Pemphredon, which subsequently always remained as such 
in his works. He no where mentions the emargination of 
the labrum, or the processes which arm the clypeus, in the 
first species of the present genus. 
Sp. 1. minutus. Fab. 
ater, mandibulis luteis, basi et apice nigris. 
length 14—1$ lines. 
Curtis, Brit. Entomology, folio 496. 
Crabro minutus. Fab. Ent. Sys. 2. 302. 32. 
Pemphredon minutus. Fab. Piez. 316. 9; St. Farg. Ency. Méth. 10. 
48.2. 9 ; V.d. Lind. pt, 2. 78. 2. 
Cemonus minutus. Jurine, 214. 
Stigmus minutus. Latr. Gen. 4. 84. 
Head black, with scattered punctures ; clypeus with three 
dentations ; mandibles yellow, with their apex rufo-piceous. 
Thorax black, with some scattered punctures on the dor- 
solum, which has also two or three obsolete longitudinal impres- 
sions ; metathorax rugose, with a few longitudinal strize at its 
base ; tubercles of a yellowish white ; tegule piceo-testaceous ; 
wings very slightly coloured, iridescent, the nervures black; the 
legs black, with the anterior tibiz yellow, having a brown spot 
on the outside, their tarsi testaceous, the knees, apex of the 
tibiz and tarsi of the intermediate and posterior pairs, rufo- 
piceous ; the intermediate and posterior legs spinose, and the 
anterior tibiz slightly ciliated. 
The abdomen black, slightly pubescent, and delicately punc- 
tured @. 
The ¢ differs in having the face in front covered with a 
silvery pubescence, and the underside of the antennz from the 
pedicel yellow, with only the margins of the joints black, and 
having that yellow which in the legs of the female is testaceous 
and rufo-piceous, the extreme joints of the intermediate and 
posterior tarsi being testaceous, and the first joint of the an- 
