TABLE OF CONTENTS. 







PAGE 



Gen. 



XXXVII. Ula . 



274 



1. 



elegans, n. sp. 2 



276 



2. 



paupera 0. S. %.$ . 



277 



Gen. 



XXXVIII. DlCBANOTA . 



278 



1. 



rivularis 0. S. % . 2 . 



281 



2. 



eucera, n. sp. % . 



281 



Gen. 



XXXIX. Plf.ctkomyia , 



282 



1. 



modesta, n. sp. % . 2 . 



284 



Gen 



XL. Rhaphidolabis 



284 



1. 



tenuipes, n. sp. % . 2 . 



287 



2. 



flaveola, n. sp. % . 2 • 



288 



Sect. VII. CYLINDROTOMINA 289 



Gen. XLI. Cylindeotoma , 296 



1. americana 0. S. % . 299 



2. nodicornis 0, S. $ . 9 • 301 



FAOE 



Gen. XLII. Teiogma . . 303 

 1. exsculpta 0. S. 2 . 304 



Gen. XLIII. Phalaceoceea . 305 

 1. tipulina 0. S. £ . 307 



Sect. VIII. PTYCHOPTEPJNA 309 



Gen. XLIV, Ptychoptera . 309 



1. rufocincta O S. % . 2 • 313 



Gen. XLV. Bittacomoepha , 313 



1. clavipes Fab. %.$ . 315 



Gen. XLVI. Peotoplasa 

 1. fitchii O. S. 



316 

 319 



APPENDIX I. 



Species described by previous authors and not contained in the 



present Monograph 321 



Say, Journal of the Academy of 



Nat. Sciences in Philad. 321 



Limnobia humeralis . 321 



Say, Long's Expedition, etc. ; 



Appendix . . . 321 



Ptychoptera 4-fasciata . 321 



Trichocera scutellata . 322 



Wiedemann's A ussereuropdische 



Zweifiiigelige Insecten . 322 



Limnobia gracilis . . 322 



A. Fitch, Winter Insects of East- 

 ern New York . . 323 

 Trichocera brumalis . 323 



Macquart, Dipt^res Exotiques, etc. 323 



Limnophila carbonaria . 323 



Walker, List of Specimens of the 



British Museum, etc. . 324 



Ptychoptera rnetallica . 324 



Chionea aspera . . 325 



scita . . . 325 



Trichocera biinacula . 325 



gracilis . . 325 



Walker, Diptera Saundersiana . 326 



Limnobia turpis . . 32 J 



biterminata . 327 



ignobilis . . 327 



Zetterstedt, Diptera Scandina- 

 via:, etc. . . . 32S 

 Erioptera fascipennis . 323 



Westwood, London and Edin- 

 burgh Philos. Magaz. . 32: 1 

 Gynoplistia annulata . 329 



