XXXII. PSEN. 295 
t4i+ The name of this genus is derived from acy¥y, the 
Greek name of the Cynips employed in the caprification 
of the fig-trees. It was established by Latreille in 1796, 
in his ‘ Precis.’ Much confusion, however, long existed, 
until Jurine united them by a permanent character; but 
even he here contradicted his own system by receiving 
into the same genus insects so distinct in the neuration of 
the wings as this, and the next genus which I have been 
obliged to establish for those that are most essentially 
fossorial, viz. which nidificate in sand, the original type 
being one of the present. 
Se. I, “aver. Fab. 
ater, clypeo argenteo villoso, facie levi 9. 
$ antennis ferrugineis, compressis, subserratis. 
length 53 lines. 
V.d. Lind. pt. 2. 102. 1; ?Latr. Hist. 13. 310; Gen. 4.92; Nouv. 
Dict. 28. 192. 
Sphex atra, Fab. Sup. 244. 18—19. 9 ; Panz. F. G. 72.7. g. 
Pelopeus unicolor, Fab. Piez. 204. 10. (without the reference to 
Panzer). 
Pelopeus compressicornis. Fab. Piez.204. 11. ¢. 
Tryporylon atratum. Fab. Piez. 182. 5. 9? 
Psenatra. Panz. Revis. 2. 108. 
pallipes. Spin. 194.2. @. 
serraticornis. Jurine, pl. 8. g.6. g. 
Entirely black; head shining, delicately punctured ; the face 
covered with a dense silvery pubescence ; antennz piceous be- 
neath. 
Thorax delicately punctured, pubescent ; the metathorax ob- 
tuse, rugose ; wings hyaline, with the nervures black ; legs black, 
very pubescent, and the posterior pairs densely spinose ; the 
tarsi piceous, with the anterior pair slightly ciliated on the ex- 
terior, and the pulvillus very large between the bifid claw at their 
extremity. 
The abdomen shining, slightly pubescent, and delicately punc- 
Q 
