120 SYRPHIDAE. 



Cltrysotoxum. 



Illiger's Magaz. II, 1803. ( 197 ). 



*derivatnm Walker, List, etc. Ill, 542. Huds. B. Terr.; Yukon 



River, Alaska; Colorado Mts. 



flavifrons Macquart, Dipt. Exot. II, 2, 17, 2; Tab. Ill, f. 2. - - New- 

 foundland. 



* lateral e Loew, Ctntur. V, 42. - - Nebraska. 



* pufoescens Loew, Wiener Ent. Monatschr. IV, 83, 10; Centur. V, 43. - 



Distr. Columbia. 



* veiitricosiim Loew, Centur. V, 44. - - Distr. Columbia. 



iiigrita Fabricius, Ent. System. IV, 292, 49 (Syrplms); System. Antl. 

 183, 1 (Mulio); Wiedemann, Auss. Zw. II, 88, 2. - - Jamaica. 



Paras us. 



Latreille, Hist. Nat. Crust, et Ins. XIV, 358; 1804. 



*angustifrons Loew, Centur. IV, 64. - - Virginia. 



*bicolor Fabricius, Meigen, etc. - - Europe and North America. 



* (limidiatus Loew, Centur. IV, 63. - - Distr. Columbia. 



Observation. Paragus transatlanticus Walker, List, etc. Ill, 

 544, Trenton Falls, is represented in the Brit. Mus. by two spe- 

 cimens, both types; only one of them is a Paragus. 



For Paragus aeneus Walker, see 0-rtlioneura. ( los ). 



Pipiza. 



Falldn, Dipt. Suec. Syrphi, 58; 1816. 



bnccata Macquart, Dipt. Exot. II, 2, 107; Tab. XVIII, f. 2. Carolina. 

 *calcarata Loew, Centur. VI, 42. - - New York. 

 *femoralis Loew, Centur. VI, 38. - - Illinois. 

 *festiva Meigen (or a species closely allied to it). - - Canada. 

 *fraudulenta Loew, Centur. VI, 41. - - Illinois. 

 *nigribarba Loew, Centur. VI, 40. - New York. 



radicum Riley, 1st R ep . p . 121, f. 66; Amer. Ent. I, p. 83. - - Illinois 



(apparently the same as funornlix Loew). 

 *salax Loew, Centur. VI, 39. - - Pennsylvania. 



divisa Walker, Trans. Ent. Soc. N. Ser. IV, 156. - - Vera Cruz. 



Psilota. 



Meigen, System. Beschr. Ill, 256; 1822. 



flavidipeimis Macquart, Dipt. Exot. 5<> Suppl. 97; Tab V, f. 5 (com- 

 pare the remark in Loew, Monogr. I, 27). - Philadelphia. 



Triglyphus. 



Loew, Oken's Lis. 1840, 512. 



*i5iodestus Loew, Centur. IV, 62. - - New York. 

 * pube , ecus Loew, Centur. IV, 61. - - Wisconsin. 



