450 PROCEEDINGS OF THE NATIONAL MUSEUM 



Figures 21-38. — Melayiagromyza species. Heads are shown in profile. Solid line equals 1 mm. 



Fig. 21. — Head of holotype (? of MelanagTomyr.a aldrichi Frick. 



Fig. 22. — Head of holotype cf of M. angelicae (Frost). 



Fig. 23. — Head of holotype cf of M. apfroximata (Frost). 



Fig. 24. — Portion of head of holotype 9 of M. burgessi (Malloch). 



Fig. 25. — Head of same, one-half size. 



Fig. 26. — Head of holotype 9 of M. caerulea (Malloch), one-half size. 



Fig. 27. — Antenna of allotype cf of M. dianthereae (Malloch), greatly enlarged. 



Fig. 28. — Antenna of holotype 9 of same, greatly enlarged. 



Fig. 29. — Head of same, one-half size. 



Fig. 30. — Head of paratype 9 of M. gibsoni (Malloch). 



Fig. 31.— Head of holotype 9 of M. longiseta (Malloch). 



Fig. 32. — Head of holotype cf of M. mallochi (Hendel). 



Fig. 33. — Head of holotype cT of M. minima (Malloch). 



Fig. 34. — Head of holotype cT of M. orbiialis (Frost), dorsal upper-orbital, ocellar, and inner 



vertical setae broken off. 

 Fig. 35. — Head of holotype 9 of M. riparella (Hendel). 

 Fig. 36. — Head of holotype cf of M. salicis (Malloch). 

 Fig. 37. — Head of holotype cf of M. selifrons (Melander). 

 Fig. 38.^ — Head of holotype cf of M. similata (Malloch). 



