U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 84 PLATE 17 



Heads of Exetastes. 

 16, lasius; 17, ruficoxalis: 1«, illinoiensis; 19, biocu latus; 20, diiutipes (h=hypostomaI carina): 21, abdommalis: 

 22, matricus: 23, carinatifrons: 24, bioculatus; 25, ruficoxalis; 26, itlinoievsix; 27, propinquus: 28, flatus: 29, 

 septum; 30, /a«!U«,- 31, angusioralis; 32, hifenestratus: 33. iyneipennis; 34, caTinatifrons; 35, suareolens; 36, 

 ornatus; 37, bituminosus; 38, rugosus; 39, diiutipes; 40, zelotypus; 41, a^nis; 42, matricus. 



