34 



THE NORTH AMERICAN SPECIES OF DROSOPHILA. 



External male genitalia. A, anal plate; C, clasper; G, genital arch. 

 Fig. 13. — Drosophila melanogaster. Fig. 15. — Drosophila busckii. 



Fig. 14. Drosophila simulana. Fig. 16.— Drosophila funebris. 



