of the Family Tabanide. 309 
greater size and in the wing, as shown in my table. This 
latter author thinks tnzczsus may be the same as guttula, W.; 
it appears to me that crucians, W.., is allied to incisus ; thus 
incisus, crucians, leucospilus, and guttula all seem to be very 
nearly related, and may prove to be one or more species 
only, when good series of them are obtained for comparison. 
I can find no real difference between molestus, W., and in- 
trudens, Williston, judging from the descriptions only, neither 
of which are very plain; they are grouped together for the 
present in the table with oculatus, Bigot: merula, Philippi, 
a Chilian species, is placed first among those species with a 
band and no clear spot in the discal cell of the wing; but as 
it is not stated whether a male or female was being described, 
and the description is most meagre, it 1s impossible to distin- 
guish it better: trifariam, Macq., and Jatifasciatus, Bell., 
seem very nearly allied; Macquart’s type was from Chili, 
Bellardi’s from Mexico, and it is also found in Central 
America. C. fulviceps, W\k., List Dipt. pt. v. Suppl. 1, 
p. 286, is not to be traced; itmmaculatus, Wiedem., is 
bracketed with dimaculatus, Wiedem., as the author suggests 
it is only a variety of the latter. The plate of C. lugubris, 
Macq., is apparently incorrect. The Chrysops varipes, 
Walker, described on page 289 (List Dipt.), does not belong 
to this genus, but is a specimen of Diachlorus curvipes, Fabr. ; 
the Chrysops inornatus, Walker, List Dipt. pt. 1. p. 199, is a 
specimen of Diachlorus bivittatus, Wiedem.; the Chrysops 
convergens and approximans, Wlk. List Dipt. i. p. 198 
(1848), are both specimens of Diachlorus ferrugatus, Fabr. 
(see Osten Sacken, Mem. Boston Soc. Nat. Hist. 11. p. 396, 
respecting this species and its synonyms). 
The following is a list of the twenty-seven described species 
from this region, including one new, with a table for their 
identification :— 
*C, costatus, § 2, Fabr., Ent. Syst. iv. p. 878 (1794) (Tabanus) ; id. Syst. 
Antl. p. 112 (1805) ; Pal. Beauv., Ins. p. 223, pl. iii. fig. 7 (1805- 
1821); Wiedem., Dipt. Exot. i. p. 104 (1821); id. Auss. zweifl. 
Ins. i. p. 198 (1828); Macq., Dipt. Exot. i. p. 160 (1838); Bigot, 
R. de la Sagra’s Hist. Cuba, p. 798 (1857) ; Guérin, Icon. iti. p. 542, 
pl. xevii. fig. 8 (1844) ; Osten Sacken, Cat. Dipt. N. Amer. (1878) ; 
id. Berlin. ent. Zeit. xxvii. p. 297 (1888); id. Biol. Centr.-Amer., 
Dipt. i. p. 46 (1887); Williston, Trans. Kans. Acad. x. p. 134 
(1887) ; Townsend, Trans. Amer, Ent. Soc. xxii. p. 56 (1895) ; id. 
Ann. & Mag. Nat. Hist. (6) xix. p. 18 (1897). [? Tabanus variegatus, 
De Geer, Ins. vi. pl. xxx. fig. 7 (1776). Chrysops vulneratus, Rond., 
Esame varie specie, &c. p. 44 (1848); Osten Sacken, Berlin. ent. 
Zeit. xxvii, p. 297 (1883). Chrysops amazontus, Rond., Archivio 
Canestrini, ii. p. 81 (1864).|—Central and South America, W. 
Indies. 
Ann. & Mag. N. Hist. Ser. 7. Vol. viii. 22 
