BRITISH HYMENOPTERA. 
33 
5. DIODONTUS. 
Crabro, pt., Fab. Ent. Syst. ii. 293, 1793. 
Pemphredon, pt., Fab. Syst. Piez. 314, 1804 
Stigmus, Latr . Gen. Crust. Ins. iv. 84, 1806. 
Cemonus, Jurine , Hym. 214, 1807. 
Diodontus, Curtis , Brit. Ent. ii. 496, 1836. 
1. Diodontus minutus. B. M. 
Crabro minutus, Fab. Ent. Syst. ii. 302, 32. 
Pemphredon minutus, Fab. Syst . Piez. 316, 9. Van der Lind. 
Obs. ii. 78, 2. St. Farg . Hist. Nat . Ins . iii. 96, 2. 
Sphex pallipes, Panz. Faun. Germ. 52, 22 ? 
Cemonus minutus, Jurine , Hym. 214. 
Stigmus minutus, Latr. Gen. Crust. Ins. iv. 84. 
Diodontus minutus, Curtis , Brit. Ent. xi. 496 (not fig.) Shuck. Foss. 
Hym. 185, 1 . Dahlb. Hym. Europ. 252, 152. 
Hab. — B ritain, Bramble-sticks, &c. 
2. Diodontus luperus. 
Diodontus luperus, Shuck . Foss. Hym. 186, 2. Dahlb. Hym . 
Europ. 254, 153. 
Hab. — B ritain. 
3. Diodontus tristis. 
Pemphredon tristis, Van der Lind. Obs. ii. 76, 1. 
Diodontus tristis, Shuck. Foss. Hym. 187, 3. 
Pemphredon pallipes, Dahlb. Hym. Europ. 250, 151. St. Farg. 
Hist. Nat. Ins. iii. 95, 1. 
Hab. — B ritain. 
6. PASSALCECUS. 
Pemphredon, Van der Lind. Obs. ii. 79, 1829. 
Diodontus, Curtis , Brit. Ent. xi. 496, 1835. 
Xylaecus, Shuck. Foss. Hym. Conspec. Gen. 1837. 
Passalcecus, Shuck. Foss. Hym. 188, 1837. 
