292 CATALOGUE OF NORTH AMERICAN DIPTERA. 



rotundiceps Loew, Neue Beitr., viii, 51 ; Mon. N. A. Dipt., 11, 146. — D. C. 



signifer Osten Sacken, Cat., 242. — Tarrytown and Manlius, N. Y. 



xipheres Wheeler, Proc. Cal. Acad. Sci., 11, 34, pi. 11, f. 53. — Delaware Co., Pa. 



RHAPHIUM. 



Miegen, Illig. Mag., 11, 272, 1803; Syst. Besclir., iv, 28, 1824. 

 Loew, Neue Beitr., v, 30, 1857 ; viii, 49, 1861 ; Mon. N. A. Dipt., 11, 140, 1864. 

 lugubre Loew, Neue Beitr., viii, 49; Mon. N. A. Dipt., 11, 141. — Carolina. 

 Delaware Co., Pa.— J. M. A. 



NEMATOPROCTUS. 



Loew, Neue Beitr., v, 40, 1857; viii, 53, 1861 ; Mon. N. A. Dipt., 11, 150, 1864. 

 venustus Melander, Canad. Ent., xxxii, 142, f. 12. — Westville, N. J. 



SYNTORMON. 



Loew, Neue Beitr., v, 35, 1857 {Syntormon and SynarfJirus) ; Mon. N. A. 



Dipt., II, 133 and 134 (id.), 1864. 

 ScHiNER, Fauna Austr., i, 192, 1862. 



Wheeler, Proc. Cal. Acad. Sci., 11, 36, 1899, reinstates Synarthrus. 

 Mik, Wien. Ent. Zeitung, xix, 20, 1899. 

 affine Wheeler, Proc. Cal. Acad. Sci., 11, 38, pi. iii, f. 56-59 (Synarthrus) . — 



Monterey, Cal. 

 barbatum Loew, see CItrysotus. 



cinereiventris Loew, Neue Beitr., viii, 48; Mon. N. A. Dipt., 11, 137 (both Synarth- 

 rus). — Middle States. Texas- — O. S. Cat. 

 Loew, Zeitsch. f. Ges. Naturwiss., xliv, 1874, 77, male (id.). 

 Wheeler, Psyche, June, 1890, 362 (id.).- — Wis 

 palmare Loew, Mon. N. A. Dipt., 11, 135 (Synarthrus). — Sitka. Wash. — J. M. A. 

 quadratum Aldrich, Biologia, Dipt., i, 342, pi. vi, f. 18. — Mexico City. 

 strataegum Wheeler, Proc. Cal. Acad. Sci., 11, 39, pi. iii, f. 60, 61 (Synarthrus). 

 — Lusk, Wyo. ; Monterey, Cal. 



Sympycnin^. 



PARASYNTORMON. 



Wheeler, Proc. Cal. Acad. Sci., 11, 41, 1899, def. and table of species. 

 asellus Wheeler, Proc. Cal. Acad. Sci., 11, 42. — Coronado, Cal. 

 emarginatum Wheeler, Proc. Cal. Acad. Sci., 11, 45, pi. iii, f. 75. — Monterey and 



San Diego, Cal. 

 hinnulus Wheeler, Proc. Cal. Acad. Sci., 11, 44, pi. iii, f. 72, 72- — Lusk, Wyo. 

 lagotis Wheeler, Proc. Cal. Acad. Sci., 11, 43, pi. iii, f. 70, 71. — Monterey, Cal. 

 montivagum Wheeler, Proc. Cal. Acad. Sci., 11, 46, pi. in, f. 74. — Wind R. Mts., 



Wyo. 

 occidentale Aldrich, Kans. Univ. Quart., 11, 1894, 153 (Sympycnus) . — Wyo. 



Wheeler, Proc. Cal. Acad. Sci., 11, 43, oc. in Wind R. Mts., Wyo., and 

 gen. ref. 

 wheeleri Aldrich, Biologia, Dipt., i, 343, pi. vi, f. 19.— Mexico City. 



SYMPYCNUS. 



Loew, Neue Beitr., v, 42, 1857 ; viii, 66, 1861 ; Mon. N. A. Dipt., 11, 185, 1864. 

 ScHiNER, Fauna Austr., i, 231, 1862. 



