U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 79, ART. 18 PL. 2 



o/mm 



PROTOSTRONGYLUS MACROTIS 



1, Tail end of female; 2, vulva; 3, e.sophagus; 4, telamon (diagrammatic); 5. tail end of male; 6, bursa 



of male 



