170 Miss G. Ricarclo on the Pang'Oiiiiiaj 



1\ tranqiiilla, Otiten Sacken, I. c. p. 367; id. Cat.^ — Hab. Pemisyl- 



vaiiia. 

 P. pigra, Oslen Sacken, /. c. ; id. Cat. — Hah. New York. 

 P. ckrysocoma, Osten Sacken, /. c. p. 368; id. Cat. — Hah. New York. 

 P. kei'a, Osten Sacken, Western Diptera, p. 214 (1877).— Hab. San 



Francisco. 

 P. ?-asa, Loew, Dipt. Am. Sept. viii. p. 7 ; Loew, Berlin, ent. Zeitschr. 



xiii. (1869) ; Osten Sacken, Mem. Boston Soc. Nat. Hist. p. 366 



(1876) ; id. Cat. (1878).— Hab. Illinois. 

 P. aurulans, Wiedem., /. c. ii. p. 620; Walker, /. r.. pt. v. Suppl. 1, 



p. 120 (1854) ; Osten Sacken, Cat.— Hab. Mexico. 



Pangonia, Rond. 

 Wings with first posterior cell closed. Et/es bare. 



Pangonia fusiformis, ? , Walker, Dipt. Saund. pt. i. p. 19 

 (1850) ; b. S. Cat. Dipt. N. Amer. (1878). 



Walker's description should be amended thus : — Abdomen 

 with first and second segments transparent yellow, in middle 

 of second segment a long brown spot; third segment brown, 

 its extreme anterior and posterior margins yellow; the 

 remaining segments brown, darker in colour on the posterior 

 margins ; on the underside there is no brown spot on the 

 second segment, and only the anterior margin of third segment 

 is yellow. Palpi curved, the same width throughout. 



This species belongs to the same group as the South- 

 American species arcuafaf Jilipaljns, Will., &c. 



Hab. Mexico. 



Pangonia tenuirostri'.f, (^ , Walker, Trans. Ent, Soc. v. p. 272 

 (1860) ; 0. S. Cat. Dipt. N. Amer. (1878). 



The wings have a long appendix on fork of the third 

 longitudinal vein. 

 IJab. Mexico. 



Pangonia atri'fera, (J , Walker, I. c. ; O. S. Cat. Dipt. N. 

 Amer. (1878). 



The last joint of the palpi is red. There are a few orange 

 hairs on the lateral margins of the last segments. Wings 

 have an appendix. 



Ilab. Mexico. 



