CATALOGUE OF NORTH AMERICAN DIPTERA. 365 



Chagnon, fit. Prelim, les Syrph., 2,2. — St. Jean, Quebec. 

 N. A., in nearl}^ all local lists, 

 arcucinctus Walker, see arcuatus. 



bisinuatus Williston, Biologia, Dipt., in, 17. — Guerrero, Mex., and Costa Rica. 

 GiGLio-Tos, Ditt. del Mess., 11, 28. — Oaxaca, Orizaba and Tehuacan, Alex, 

 boscii Macquart, see Mesogramma. 

 bryantii Johnson, see contitmax. 

 coalescens Walker, see Mesogramma. 



coUudens Walker, Trans. Ent. Soc, n. ser., v, 292. — Mex. 

 concavus Say, Jour. Acad. Sci. Phil., in, 89 {Scava) ; Compl. Works, 11, 78.— 

 Pa. 

 Perhaps same as forvits — O. S., Cat., 123. 

 contumax Osten Sacken, Proc. Bost. Soc. Nat. Hist., xviii, 148.— White Mts., 

 N. H. 

 Walker, List, in, 584 (adolcsccns) . — Martin Falls and Nova Scotia. 

 Williston, Synop. N. A. Syrph., 71.— White Mts., N. H. 

 CoQUiLLETT, Proc. Wash. Acad. Sci., 11, 431, oc. in Alaska. 

 Johnson, Ent. News, ix, 17 (bryantii). — Mt. St. Elias. Alaska. [John- 

 son, /;; lift.] 



Xotc. — Walker's types, as quoted by Osten Sacken, Cat., 245, note, be- 

 long to three species ; hence his name is not entitled to priority. 

 corbis Walker, see Mesogramma. 



creper Snow, Kans. Univ. Quart., in, 234. — Col. and N. M. 

 Snow, ibid., i. 37 ( paii.vilhis Will.). 

 N. M.— Coquillett. 

 decipiens Williston, Biologia, Dipt., in, 18. — Guerrero, Mex. 

 delineatus Macquart, Dipt. Exot., Suppl. i, 139, pi. xi, f. 13. — Mex. 

 dimensus Walker, see AUograpta obliqua. 

 dimidiatus Macquart, Hist. Nat. Dipt., i. 537. — Ga. 



Williston, Synop. N. A. Syrph., 294, cannot be identified. 

 disgregus Snow, Kans. Univ. Quart., in. 2t,t,. — N. M., 7,500-8,500 ft. 

 disjectus Williston, Proc. Amer. Phil. Soc, xx, 314 {disjunctns Maco.) ; 

 Synop. N. A. Syrph., 72.— Wash. 

 Snow, Kans. Univ. Quart., i, 36, note on female. — Col. 

 White Mts., N. H.— Slosson. 

 diversipes Macquart, Dipt. Exot., Suppl. iv, 155, — Newfoundland. 



Osten Sacken, Proc. Bost. Soc. Nat. Hist., xviii, 149.— L. Superior. 

 Williston, Synop. N. A. Syrph., 76.— White Mts., N. H. ; N. Y., Wash. 

 Coquillett, Proc. Wash. Acad. Sci., n, 431, oc. in Alaska. 

 Verrall, Brit. Flies, viii, 676. 



Chagnon, fit. Prelim, les Syrph., 34. — Rigaud, Quebec. 

 diversus Williston, Biologia, Dipt., in, 16, pi. i, f. 6. — Guerrero. Mex. 

 diyadis Holmgren, see tarsatus. 

 eupeltatus Bigot, Annales, 1884, 91. — Mex. 



Williston, Biologia, Dipt., in, 16, notes. — Guerrero, Mex. 

 Giglio-Tos, Ditt. del Mess., n, 29. — Angang, Mex. 

 fumipennis Thomson, Eugen. Resa, 499. — Cal. 



Williston, Synop. N. A. Syrph., 293, notes; quotes desc. 

 geniculatus Macquart, Dipt. Exot., 11. 2, loi, pi. xvii. f. 5. — Newfoundland. 



Osten Sacken, Proc. Bost. Soc. Nat. Hist., xvin, 159; Cat., 245, note on 



type.— White Mts., N. H. 

 Williston, Synop. N. A. Syrph., 84, pi. iv, f. 3.— White Mts., N. H. 

 Alaska — Coquillett and Johnson. 



