246 The Ohio Naturalist. [Vol. V, No. 2, 



CHRYSOPS. 



carbonarius Walker, List I, 203, Ricardo, An. Mag. Nat. Hist., Series 7, 

 VIII, 303. From Me., N. H., Mass., Col., Wyo., N. J., N. C, Canada. 

 nigcr Walker (not Macq), List I, 202. 

 provocans Walker, Dipt. Saund. I, 73. 

 (?) atra Macquart, Dipt. Exot., Suppl. 4, 40. 



fitgax Osten Sacken, Prodrome I, 375. Williston Tr. Ks. Acad. Sci. X, 

 132. 

 ceras Townsend, Psyche VIII, 38. From New Mexico and northern 



Mexico, 

 coloradensis Bigot (in part), Mem. Soc. Zool. Fr. V, 605. Ricardo, Ann. 

 Mag. Nat. Hist., Ser. 7, VIII, 307. From Col., Cal., and Washington, 

 coquillettii Hine. Described in this paper. From Colorado, 

 discalis Williston, Tr. Conn. Acad. IV. 245. From Wyo., Col., Mont, and 



Utah, 

 excitans Walker, Dipt. Saund. 72. Osten Sacken, Prodrome I, 373. From 



Me., N. H., Pa., Wash., B. C, Ills., Mass. 

 facialis Townsend, Psj^che VIII, 39. From N. M. and Ariz, 

 frigidus Osten Sacken, Prodrome I, 384. Prodrome II, 474. Hine, Taban. 

 Ohio 37. From N. H., N. Y., Mass., N. J., Ohio, Wash., British 

 Possessions. 

 fulvaster Osten Sacken, West. Dipt. 221. Ricardo, An. Mag. Nat. Hist., 

 Ser. 7, VIII, 306. From Col., Utah, Wyo., Ariz., N. M., Mont. 

 coloradensis Bigot (in part) Mem. Soc. Zool. Fr. V, 605. 

 furcatus Walker, List I, 1*)9. Osten Sacken Prodrome I, 39L Ricardo, An. 



Mag. Nat. Hist. Ser. 7, VIII, 302. From N. Y., Montreal, Canada, 

 lupus Whitney, Can. Ent. XXXVI, 205. From Colorado. 

 mitis Osten Sacken Prodrome I, 374. From Mont., Wash., Montreal, 



Canada. 



nigripes Zetterstedt, Ins. Lap. I, 519. Loew, Vehr. Zool. Bot. Ges. VIII, 



623. Osten Sacken, Prodrome I, 394. Coquillett, Wash. Acad. Sci. II, 



406. From Europe, Lapland and Alaska. 



noctifer Osten Sacken, West. Dipt. 220. From Cal., Wash., Mont., Br. Col. 



pertinax Williston, Tr. Ks. Acad. Sci. X, L32. Ricardo, An. Mag. Nat. 



Hist., Ser. 7, VIII, 307. 

 mgrivcntris Bigot, Mem. Soc. Zool. Fr. V, 604. 

 pachycera Williston, Tr. Ks. Ac. Sci. X, 134. Adams, Ks. Un. Sci. Bull. 



il, 442. From Cal. and Ariz, 

 pikei Whitney, Can. Ent. XXXVI, 205. From Missouri, 

 proclivis Osten Sacken, West. Dipt. 222. Ricardo, An. Mag. Nat. Hist. 

 Ser. 7, VIII, 306. Froin California and Washington. 

 atricornis Bigot, Mem. Soc. Zool. Fr. V, 603. 



pachycera Williston (male onlv) Tr. Ks. Ac. Sc. X, 134. Adams, Ks. L^n. 

 Sc. Bull. II, 442. 

 sequax Williston, Tr. Ks. Ac. Sci. X, 133. From Ks. and N. C. 

 surdus Osten Sacken, West. Dipt. 223. Williston, Tr. Ks. Ac. Sci. X, 134. 



From Cal,, Or. B. C. 

 virgulatus Bellardi, Saggio Ditt. Mes. 1,71, tab. 2. fig. 17. Williston, Biol. 

 Cent. Am. I, 255. From Mexico. 

 geminatus Macquart (not Wiedemann). Dipt. Exot. Suppl. IV, 39. 

 crassicornis v. d. Wulp, Wicn. Ent. Zt'il. Ill, 141. 



SILVIUS. 



gigantulus Lrrw, Dipt. Am. Sept, ind. Part 10, No. 12. Osten Sacken, 

 West. Dipt. 215, Catalogue of 1878, 22t). From Cal., Wa.sh., B. C, 

 N. Mex.,Col. 

 trifoliiim Osten Sacken. Prodrome 1, 395. 



