256 A. Handlirsch, 



3. Thorax niger, nimqnam rufo- vel testaceo-variegatus. . . 4, 



— saltem pro parte rufus vel testaeeus 5. 



4. Pedes rufo- et flavopicti. Scutellum fiavomaculatum. (Species 

 palaearctica) Ä. fuscatus Ta,nz. 



— nigri, solum geniciüis pallidioribus. Scutellum nigrum. 

 (Species nearctica) A. oppositus Say, 



5. Thorax maxima parte rufus vel testaeeus 6. 



uiger, sölum segmentum mediale, area mediana 



excepta, rufum. (Species palaearctica) Ä.Perthe'esii Gors^s^i. 



6. Scutellum rufum; segmentum secundum basi rufa. (Species 

 nearctica) A. melleus Say. 



— flavum, segmentum secundum basi nigra. (Species palae- 

 arctica) A. Maracandensis Rad. 



Didineis Wesmael. 



< Pompilus Fabricius, Entomolog. Syst. Supplem. 246. 1798. 



< — Walckenaer, Faime Parisienne. IL 79. 1802. 

 <; _ Fabricius, Syst. Piezat. 187. 1804. 



< Alyson Latreille, Gen. Crust. et Ins. IV. 86. 1809. 



< — — Considörations generales. 325. 1810. 



< — Lepeletier et Serville, Encyclop. methocl. X. 49. 1825. 



< — Cuvi er, Eegne animal. 2. Ed. V. 331. 1829. 



< — Ciirtis.Brit. Entomol. XIII. 584. 1836. 



< — Shuckaid, Essai on indig. Fossor. Hymen. 206. 1837. 



< — Voigt, Übers, von Cuviers Regne animal. V. 489. 1839. 



< — Blancbar d, Hist. naturelle. III. 364. 1840. 



< _ Dahlbom, Hymenopt. Europae. I. 473. 1845. 

 <; — Lepeletier, Hist. nat. Hymen. III. 85. 1845. 



Didineis Wesmael, Revue critique. 96. 1851. 



< Alyson Gorski, Analecta ad Entom. Imp. Ross. 178. 1852. 



< — Schenck, Grabwespen Nassaus. 177. 1857. 



< — Taschenberg, Zeitschr. f. d. ges. Naturw. XIL 86. 1858. 

 Didineis Smith, Catal. Brit. fossor. Hymen. 110. 1858. 



< Alyson Taschenberg, Hymenopt. Deutschlands. 198. 1866. 



< — Packard, Proc. of the Ent. Soc. of Philadelphia VL 420. 1867. 

 Didineis A. Costa, Annuario del Mus. zoolog. di Napoli V. 91. 1869. 



< Alyhon Taschenberg, Zeitschr. f. d. g. Naturw. LXV. 370. 1875. 

 Didineis, Saunders, Synopsis. Trans. Ent. Soc. London. 266. 1880. 



< Alyson Cresson, Synopsis. Trans Amer. Ent. Soc. 117. 1887. 



Mit der Gattung Alyson am nächsten verwandt und in vielen 

 Merkmalen mit derselben übereinstimmend. 



