CERATOPHORUS ANTHRACINUS. 177 



towards the marginal cell ; the legs simple. Abdomen ovate, 

 petiolated, the petiole very short ; the apical segment cana- 

 liculated. 



1. Ceratophorus mono. 

 C. ater ; marginis metathoracis summo lsevi, abdominis petiolo 

 brevi. 



Pemphredon morio, Van d. Lind. Obs. ii. 82. 5. 



Shuck. Foss. Hym. 198. 3. 

 Ceratophorus morio, Shuck. Foss. Hym. 198 (note). 



Dahlb. Hym. Foss. Europ. i. 256. 57. 



Wesm. Hym. Foss. Belg. 118. 1. 



Female. Length 3 lines. — Shining black ; head punctured and 

 slightly pubescent; an obtuse tubercle, sometimes slightly 

 emarginate, in the centre of the face ; the mandibles rufescent. 

 at their apex. Thorax : the mesothorax punctured ; the scu- 

 tellum smooth and shining, with a few fine punctures ; the 

 metathorax rugose, at its base a subcordiform space enclosed 

 by a smooth shining margin ; wings hyaline and iridescent, 

 the nervures piceous, the stigma dark brown. Abdomen : the 

 petiole rugose half the length of the first segment, and canali- 

 culated down the centre ; the apical segments sprinkled with 

 silvery-white hairs. 



The Male has the tubercle on the face less obtuse, and the 

 mandibles tridentate. 



This species appears to be rare. It is occasionally found in 

 the neighbourhood of London, but I know of no other locality. 



2. Ceratophorus anthracinus. 



C. ater ; capite subquadrato, tuberculo inter antennas obtuso ; 

 metathorace rugoso, basi spatio cordiformi, limbo angusto 

 polito ; alis sordide hyalinis. 



Ceratophorus anthracinus, Smith, Zool. vs.. Append, cxxvi. 



Female. Length 4 lines. — Black ; head nearly quadrate, closely 

 punctured and subopake, covered with thinly scattered cinereous 

 pubescence ; the face with an obtuse tubercle in the centre ; 

 the clypeus deeply and widely emarginate, its lateral angles 

 prominent, subdentate ; the labrum triangular, shining, and 

 grooved down the centre. The metathorax rugose, with a 

 subcordiform space at its base, enclosed by a very narrow 

 shining margin ; wings clouded, the secoud recurrent nervure 

 uniting with the first transverse cubital nervure. Abdomen 



i5 



