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together, I can make only one division in the subfamily that is sup- 

 ported by enough correlating characters to convince that it is impor- 

 tant and natural, and propose to consider the resulting two sections 

 the only valid genera. Both are world-wide in distribution and con- 

 tain diverse sets of species. Among them are natural subgroupings 

 that can be defined, but the significance of these is relatively minor, 

 and I should rank them as species groups or as subgenera rather than 

 as genera. 



KEY TO THE GENERA OF AULACINAE 



1. Tarsal claws with two or more teeth; occipital carina nearly always present; 

 groove on inner side of hind coxa of female situated beyond middle of coxa, 

 always present and usually vertical; outer apical margin of middle tibia pro- 

 duced as an acute tooth; as seen from side, top and front faces of median lobe 

 of mesoscutum meeting at an angle or hyperbola usually less than 90°, 



Aulacostethus 

 Tarsal claws apparently simple, but each with a single basal tooth difficult to 

 see; occipital carina absent; groove on inner side of hind coxa of female, when 

 present, either situated basad of middle or very oblique; outer apical margin 

 of middle tibia sometimes produced as a tooth; as seen from side, top and 

 front faces of median lobe of mesoscutum meeting at an angle or hyperbola 

 not greater than 90°, or meeting in a rounded curve that shows no 

 angle Aulacus 



Genus AULACOSTETHUS Philippi 



Aulacostethus Philippi, Ent. Zeit. Stettin, vol. 34, p. 302, 1873. Type: Aula- 

 costethus rubriventer Philippi. Monobasic. 



Pristaulacus Kieffer, Ann. Soc. Ent. France, vol, 68, p, 813, 1900, Type: 

 Pristaulacus chlapowskii Kieffer; designated by Bradley, 1908. (New syn- 

 onymy,) 



Deraiodontus Bradley, Ent. Student, vol. 2, p. 29, 1901, Type: Aulacus montanus 

 Cresson; designated by Bradley, 1901, 



Oleisoprister Bradley, Trans. Amer. Ent. Soc, vol. 27, p. 324, 1901. Type: 

 {Aulacus fir mus Cresson) —resutorivor us Westwood; original designation. 



Anaulaciis Semenow, Rev. Russe Ent., vol. 3, p. 173, 1903 (preoccupied). Type: 

 Aulacus sibiricola Semenow. Monobasic. 



Semenowia Kieffer, in Andr6, Species des hymenoptSres d'Europe et d'Alg6rie, 

 vol. 7 bis, p. 382, 1903 (preoccupied). New name for Anaulacvs Semenow. 



Odontaulacus Kieffer, in Andr6, Species des hymenopt^res d'Europe et d'Alg^rie, 

 vol. 7 bis, p. 382, 1903. Type: Aulacus rufitarsis Cresson; designated by 

 Bradley, 1908. (New synonymy.) 



Semenovius Bradley, Trans. Amer. Ent. Soc, vol. 34, p. 123, 1908. New 

 name for Anaulacus Semenow. 



Tropaulacus Bradley, Trans. Amer. Ent. Soc, vol. 34, p. 125, 1908, Type: 

 Tropaulacus torridus Bradley, Monobasic. (New synonymy.) 



Neaulacus Bradley, Trans. Amer. Ent. Soc, vol. 34, p. 126, 1908. Type: Aulacus 

 occidentalis Cresson; original designation. 



^Disaulacinus Kieffer, Bull, Soc. Ent, France, 1910, p. 350. Type Disaulacinus 

 flavimanus Kieffer; first species included (by Kieffer, 1911). (New syn- 

 onymy.) 



Tetraulacinus Kieffer, Bull. Soc. Ent. France, 1910, p. 350. Type: Pristaulacus 

 rufobalteatus Cameron; first species included (by Kieffer, 1911), (New 

 synonymy,) 



