g 
300 Miss G. Ricardo on the Pangonine 
Dipt. N. Amer. (1878) ; Williston, Trans. Kans. Acad. x. pp. 182, 
134 (1887). [C. atricornis, § 2, Bigot, Mém. Soe. Zool. Fr. v. 
p. 603 (1892). |—California. 
’ erassicornis, 2, v. der Wulp, Wien. ent. Zeit. iii. p. 141 (1884) ; id. 
Ent. Belg. xxviii. p. 289 (1884). [C. geminatus, Macq., Dipt. Exot. 
Suppl. 4, p. 39 (1850) (excl. syn. Wiedem.).|—Mexico. 
cuchix, 2, C. P. Whitney, Canada Ent. xi. p. 35 (1879); Williston, 
Trans. Kans. Acad. pp. 13], 134 (1887).—Milford, N.H. 
".cursim, 2, C. P. Whitney, J. c p. 36; Williston, 7. ¢. p. 184— 
Milford, N.H.—Williston thinks this may be the same as C. pudz- 
cus, Osten Sacken. 
€. nigrilinbo, 9, C. P. Whitney, 7. c.; Williston, J. c. p. 131.—Milford, 
N.H 
fon 
Gy $2 
C. disealis, 9, Williston, Trans. Conn. Acad. iv. p. 245 (1880); id. 
Trans. Kans. Acad. x. pp. 132, 184 (1887).—N. America. 
*(C, pertinax, 9, Williston, Trans. Kans. Acad. x. p. 132 (1887).—United 
States. [C. nigriventris, 2, Bigot, Mém. Soc. Zool. Fr. vy. p. 604 
(1892). | 
” sequaa, S 2, Williston, 2. c.—N. America. 
C. pachycerus, § 2, Williston, /. c. p. 134.—N. America. 
C. altivagus, S$ 2, Osten Sacken, Biol. Centr.-Amer. i. p. 45, pl. 1. 
figs. 6, 7 (1886).—Durango, Mexico. 
C. coloradensis, 2, Bigot, Mém. Soc. Zool. Fr. v. p. 605 (1892). 
C. ceras, 2, Townsend, Psyche, vii. p. 388 (1897).—New Mexico. 
C. fascialis, 9 , Townsend, /. c. p. 39.—New Mexico. 
fon 
Chrysops altivagus is included among the N.-American 
species, being just above the line of demarcation, as proposed 
by Wallace, between the two regions, and is expressly said by 
Osten Sacken to have an altogether northern physiognomy. 
Chrysops flavidus, 2, Wiedem., Dipt. Exot.1. p. 105 (1821) ; 
id. Auss. zweifl. Ins. 1. p. 199 (1828); Walker, List 
Dipt. pt. v. Suppl. 1, p. 283 (1854) ; Osten Sacken, 
Mem. Boston Soc. Nat. Hist. 1. p. 385 (1876) ; id. Cat. 
(1878). 
Chrysops canifrons, 9, Walker, List Dipt.i. p. 197 (1848) ; id. pt. v. 
Suppl. 1, p. 283 (1854). : 
Chrysops pallidus, 2, Bellardi, Ditt. Mess. 1. p. 78, pl. ii. fig. 16 
(1859). 
One female from Florida, 5 is (Doubleday). 
Walker’s type, which is a specimen of this species, 
C. flavidus, Wiedem., as suggested by Osten Sacken. 
Chrysops vittatus, 9 , Wiedem., Dipt. Exot. 1. p. 106 (1821) ; 
id. Auss. zweifl. Ins. 1. p. 200 (1828); Harris, Ins. 
New Engl. p. 406 (1841); Walker, List Dipt. pt. i. 
p. 196 (1848) ; id. pt. v. Suppl. 1, p. 284 (1854) ; Macq., 
Dipt. Exot. Suppl. 5, p. 37 (1850) ; Osten Sacken, Mem. 
