452 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



Figures 39-56. — Melanagromyza, Ophiomyia, and Tylomyza species. Heads are shown in 

 profile except where noted. The solid line equals 1 mm. 



Fig. 39. — Head of holotype 9 of Melanagromyza suhvirens (Malloch). 



Fig. 40. — Head of lectotype $ of M. lamia (Melander). 



Fig. 41. — Head of paratype 9 of M. tiliae (Couden). 



Fig. 42. — Head of paratype 9 of M. virens (Loew). 



Fig. 43. — Head of holotype 9 of M. viridis (Frost). . : 



Fig. 44. — Head of holotype 9 of M. winnemanae (Malloch). 



Fig. 45. — Portion of head of Ophiomyia maura (Meigen) (cf , Germany, ex Solidago virgaurea 



/L.), front view, greatly enlarged. 

 Fig. 46. — Head of holotype cT of 0. huscki (Frost). 

 Fig. 47. — Head of holotype c? of 0. congregata (Malloch). 



Fig. 48. — Head of 0. coniceps (Malloch) (cf , Laurel, Santa Cruz County, Calif.). 

 Fig. 49. — Head of holotype cf of 0. curvibrissata (Frost). 

 Fig. 50. — Head of holotype 9 of 0. insularis (Malloch). 



Fig. 51. — Head of 0. proboscidea (Strobl) (cf, Germany, ex Hieracium umbellatum L.). 

 Fig. 52. — Head of holotype 9 of 0. punctohalterata (Frost). 

 Fig. 53. — Head of holotype cf of 0. texana (Malloch), genovertical plates are not as in fig. 



54 because the head could not be properly oriented, all setae missing. 

 Fig. 54. — Head of paratype 9 of 0. texana (Malloch). 



Fig. 55. — Head of Tylomyza nasuta (Melander) (holotype cf of A grornyza youngi (Malloch)). 

 Fig. 56. — Wing of same, one-half size. 



