OF TPIE TABANID^ OF THE UNITED STATES. 459 



I do not see any thing in Macqnart's doscrijition of T. bicolor, which would prevent the 

 interpretation I give it. Anyhow, the name cannot stand, as there is an earher bicolor by 

 Wiedemann. Obsei've at the same time that Macquart does not mention T. lineatus any- 

 where in his works. 



In Mr. C. V. Riley's collection I find a very much damaged specimen, which I take to be 

 the male of this species, the only one 1 have seen. The head is flattened above, and not 

 very large. The demarcation between the large and small facets of the eye is distinct, 

 although the large facets are comparatively smaller than in the allied species. Macquart 

 says of his T. ccesiofasciatus 5 : " Yeux nus, composes entierement de fort jietites 

 facettes," which rather confirms me in the belief that this is the male of T. giganteus. 



38. Tabanus mexicanus. 



Tahainis mexicamts Liniic, S3'st. N;it., II, p. 1000, 10.— Fabrit-ius, Spec. Ins., II, p. 457, 16; Ent. Syst., IV, 

 p. 367, 22; Syst. Antl., p. 98, 25.— Wiedemann, Dipt. Exot, I, p. 76, 29 ; Auss. Zw., I, p. 147, 58. — Macqiunt, 

 Dipt. Exot., I, 1, p. 143,43. 



Tabanus punctatits Fabricins, Ent. Syst., IV, p. 368, 25. 



Tahanus inanis Fabiicius, 1. c, 26. 



Tahanus ochroleucus Meigen, System. Beschr., II, p. 62, 41. (Meigen erroneously took it for European.) 



Tabanus oUuaceus DeGecr, VI, p. 230, 6 ; Tab. 30, f. 6. {DeGeer quotes Linne.) 



Tabumis sidphurais Palisot-Beauvois, Ins., p. 222, Dipt. Tab. Ill, f. 3. 



Tabanus Jlacus Macquart, Hist. N.at. Dipt., I, p. 200. 13 ; Guerin et Perclieron, Genera, etc., Dipt. Tab. II. 



Tabanus viridijiavus VVallver, Newman's Zool., VIII, A])p. Ixvi ( " fide Wallicr," tlius quoted by Bellardi, 

 Saggio, I, p. 59). 



The whole body is pale yellowish, more or less tinged with greenish ; palpi yellow, slightly 

 incrassated at the base of the second joint; antennte of the same color, sometimes green ; 

 upper angle of the third joint projecting, rectangular ; front nearly parallel, Avithout any 

 callosity ; the head of the female being large, the front, for a Tahanus, has an unusual 

 length. Thorax densely clothed with yellow hairs. Wmgs subhj-aline, sometimes slightly 

 tinged with yellowish ; costal cell and stigma yellow ; crossveins and bifurcation of the third 

 vein usually (not always) clouded with brown ; according to Wiedemann, brown clouds 

 sometimes also occur on the tips of the veins, along the margin ; but this probably applies 

 to the South American species, which he had before him. All my specimens have a stump 

 of a vein on the bifurcation of the third vein. 



Hah. Florida; South Carolina (Sea Islands, May 17, 1869, B. P. Mann); New Jersey 

 (Am. Entom. Soc.) ; Mis.souri (Riley) ; Mexico (Bellardi); South America (Wiedemann). 



I never saw this species alive, but believe that in that state the green color must be more 

 distinct ; in dry specimens only traces of it remain, very irregularly distributed over the 

 body. The synonomy of Fabricius's names I borrow from Wiedemann, who saw the orig- 

 inal types ; the same for Meigen's ochroleucus. 



About his T. jlavns Macquart says that the type is in Percheron's cabinet ; Percheron's 

 figure deserves, therefore, full credit. It is strange, nevertheless, that while Macquart 

 expressly mentions the absence of the stump on the fork of the third vein, Perclieron 

 figures this stump as very long ; Macquart mentions a dark spot at the base of the 

 fork, Percheron neither figures nor mentions it ! I do not knoAv how to explain these con- 

 tradictions in the face of a synonymy which cannot be doubted. 



