18 THE CANADIAN ENTOMOLOGIST. 



abdomen cupreous . pidicornis, Bigot. 



xiiJitkopus, Wiedemann, 

 abdomen piceous decerns, Say. 



25. Hind legs varied witli brown sfamineus, Fabricius. 



Ti|) of liind tarsi only brown tricolor, Loew. 



26. Thorax and abdomen violet green, concolorous 27. 



Thorax violet or green, abdomen not concolorous 28. 



Thorax red above, scutellum dark; abdomen yellow at base; fore legs 



pale concifmiis, Osten Sacken. 



27. Legs entirely black; antennte black {nigribarbis, Bigot), viridis, Say. 

 Legs in part yellow; antennie yellow nigrifemorattis, Macquart. 



28. Wings with a brown cloud at middle {mcbeculostis, 



Zetterstedt) cuprarius, Linnaeus. 



Wings uniformly yellowish ; front legs pale , 29. 



29. Abdomen uniformly metallic 30. 



Abdomen with a white vitta Sa/lei, Bellardi. 



30. Abdomen cupreous violet speciosns, Macquart. 



Abdomen aeneous latus, Bellardi. 



Of these species the following are not listed in Osten Sacken's Cata- 

 logue : 



splendens, Bigot, Ann. Soc. Ent. France (5), ix., p. 224. 1879. Mex. 



fiigribarbis. Bigot, ibid., p. 224. Cal. { = viridis, Say.) 



clavis, WiUiston, Can. Ent., xvii., p. 123. 1885. Va., N. C. 



punctifer. Bigot. Ann. Soc. Enl. France (6), vii., p. 27. 1887. Col. 



pictt'corfiis. Biifot, ibid., p. 27. Wash. 



pallipts. Bigot, ibid., p. 28, Oregon. 



sapphireus. Bigot, ibid., p. 28, Cuba. 



cotici/muSy Osten Sacken, Biologia Cenlr. -Amer. Dipt. 



sp. innominata, Osten Sacken. ibid., p. 23. Mex. 



Williston, ibid., Suppl., p. 231. 

 filiformis. Gilio Tos, Bull. Mus. Zool. Torin. 1891, No. J02. Mex. 



( -ccesius, Bell.) 

 sp. innominata, Townsend, Ann. N. Hist., xix., p. 18. 1897. Mex. 

 ccesius, Bellardi, Williston, Biol. Centr.-Amer. Dipt. Suppl., p. 232. 

 aenilei/rons, Johnson, Ent. News, Phila., xi., p. 325. New Jersey. 

 cuprarius, Linn, etc. A common European species. 

 coarctatus, Macq., etc. A Brazilian sj^ecies, taken also in Mexico. 

 Texanus, sp, , nov. Described herewith. 



Notes on the distribution of the specimens o{ Sargus studied. 

 I. lucens, Loew. Several specimens from Hayii. 



