STILBOSOMA 



307 



(1861); SCHIN., Fauna Austriaca, Dipt., I. 354. 3. [Xylota] 



(1862) ; MALM, Goteb. Kongl. Vet. Hand]., 1863. 73. [Xylota] 



(1863) ; VERR., Entom. Monthly Mag., IX. 285. 15. [Xylota] 



(1873) ; 



(1886). 



confluens 



NEUHAUS, Diptera Marchica, 93. 8 et 120. 8. [Xylota] 



APETZ et WHLBO. in litt. apud ZETT. 

 triangularis ZETT., Insecta Lapponica, Dipt., 586. 6. [Xylota] (1838), Europacentr. 



Dipt. Scand., II. 873. 6. p. p. [Xylota] (1843) et VIII. 3192. 6. et sept. 



[Xylota] (1849) ; SCIIIN., Verb, zool.-bot. Ver. Wien, VII. 418. 1. 



[Xylota] (1857); ZETT., Dipt. Scand., XIII. 6038. 6. [Xylota] 



(1859); BONSD., Finlands tvaving. Ins., I. 291. 5. [Xylota] (1861); 



SCHIN., Fauna Austriaca, Dipt., I. 357. [Xylota] (1862) ; BECK., 



Berlin. Entom. Zeitschr., XXXIII. 191. 217. [Xylota] (1849); 



STROBL, Mittheil. Naturwiss. Ver, Steiermark, XXIX. 1892. 191. 



[Xylota] (1893). 



triangularis ZETT. var. b. = segnis L. 

 Ptuberans WILLIST., Bullet. Unit. Stat. Nat. Mus., No. 31., 225. America sept. 



[? Xylota] (1886) ; ALDR., Catal. North Amer. Dipt., 400. [? Xylota] 



(1905). 

 vecors OST.-SACK., Bullet. Buffalo Soc. Nat. Hist., III. 69. 7. [Xylota] America sept. 



(1876) et Catal. Dipt, North Amer., Edit. II., 252. 245. [Xylota] 



(1878); WILLIST., Bullet. Unit. Stat. Nat. Mus., No. 31., 232. 



[Xylota] (1886); CHAGNON, Natural. Canad., 1901. (sep.) 63. 3. 



[Xylota] (1901) ; ALDR., Catal. North Amer. Dipt., 400. [Xylota] 



(1905) ; JONES, Entomol. News Philad., XVIII. 241. 17. [Xylota] 



(1907). 

 ventralis WALK., Proc. Linn. Soc, London, III. 96. 76. [Xylota] I. Aru. 



(1859); v. D. WuLr, Catal. Dipt. South Asia, 108. [Xylota] (1896). 

 volvula FABR. = femorata L. 



Stilbosoma 



PHIL., Verb, zool.-bot. Ges. Wien, XV. 736. (1865). 



cyaneum PHIL., Verb, zool.-bot, Ges. Wien, XV. 736. 1. (1865) ; Chile. 



WILLIST., Trans. Amer. Entom. Soc. Philad., XIII. 322. (1886). 

 nigricorne WILLIST. = nigrinerve PHIL. 



nigrinerve PHIL., Verb, zool.-bot. Ges. Wien, XV. 737. 2. (1865) ; Chile. 

 WILLIST., Entomol. Americ., III. 28. (1887); F. L. ARRIB., Anal. 

 Soc. Cient. Argent., XXXIII. 192. 1. (1892). 



nigricorne WILLIST., Trans. Amer. Entom. Soc. Philad., XIII. 



322. (1886) lapsus. 



rubiceps PHIL., Verb, zool.-bot. Ges. Wien, XV. 737. 3. (1865) ; Chile. 

 SCHIN., Novara Reise, Dipt., 366. 89. tab. IV. fig. 5. (1868). 

 ruficeps WILLIST., Trans. Amer. Entom. Soc, Philad., XIII. 



322. (1886) lapsus, 

 ruficeps WILLIST. = rubiceps PHIL. 



20 



