ZETIIUS. 1 7 



2. Z. recwrvirostris De Geisr. 



F<?s;?a mexicana Linn. 12, Edit. 953, 6. — Oliv. Encycd. Meth. Ins. VI, G73. 



Vespa recurvirostris De Geek. Mem. Ill, 579, pi. 29, fig. 4, 1773. 



Fe.spa cyanipennis Fabr. Ent. syst. II, 277,86,1793; Polistes cyani- 



pennis, S. P. 275, 30. 

 Zethus cyanipennis Latr. Genera, IV, 138. — Erichs. Faun, et Flor. Brit. 



Guiana, III, 590. — Sauss. Vespides, I, 12, 6; III, 11G; Revue Zool. 



X, 1858, G3. 

 Eumenes cyanipennis Latr. Hist. Crust, et Ins. XII, 345. 

 Zethus lugubris Perty, Delect. An. Artie. 144, pi. 27, fig. 4, 1830. — Sauss. 



Vespides, I, 11, 5 ; Revue Zool. X, 1858, 63. 



Clypeo 9 lato, satis rotundato, truncato ; petiolo ovato-clavato, nigro vel 

 rufo. 



Eab. Brazil. Does not seem to inhabit Mexico. 



3. Z. clialylrjeus Sauss. 



Zethus chalybaeus Sauss. Vespides, I, 10, 3; Revue Zool. X, 1858, 63. 



Clypeo 9 transverso, rhomboidali, utrinque acute angulato, apice trun- 

 cato, bidentato. 



Eab. Brazil. 



4. Z. carbonarius Smith. 



Zethus carbonarius Smith, Cat. Brit. Mus. Vespid. 10, 5^ 



Eab. Brazil, River Amazon. 



Division HEROS. 

 (Sauss. Vespides, III, 115.) 



Clypeus lozenge-shaped, transverse, forming on each side a 

 sharp lateral angle ; abdomen depressed, its second segment sub- 

 sessile, enlarging gradually. Head swollen at vertex, and con- 

 vex. Ocelli arranged upon a very oblique, almost vertical plane. 



5. Z. gigas Spin. 



Zethus gigas Spinola, Ann. Soc. Ent. Fr. X, 1841, 129, 80. — Sauss. Ves- 

 pides, I, 12, 7; Ib. Ill, 115. 

 Calligaster heros Sauss. 1 Vespides, I, 23, I, 9, pi. ix, fig. 6, 1852. 



1 This name was given by De Haan ; but it is a collective name, and 

 after having cited Haan, for satisfaction, in the description o( the sjuvies, 

 we here suppress the name ; considering that we do not rocogni/e the «ol- 

 leotive name, as we have said elsewhere, and do not wish, by setting r£ 

 example, to preserve it. 

 2 



