192 PROCEEDINGS OF SOCIETIES. 



Rm., M. —Reaumur, Memoires pour servir Tr. E. S. — Transactions of the Entomolo- 



a 1' Histoire des Insectes. gical Society of London. 



Rsl., Ins^ B. — Roesel, Insekten Belusti- V. Schl.G Arbeiten und Veranderungen 



gungen. der Schlesiche Gesellschaft fiir vater- 



Rzbg., (F.I.) — Ratzeburg, Forst-Insekten. landische Kultur, u. s. w. 



S. E. Z.— Zeitschrift fur Entomologie, im V. Z. B. V. W.— Verhandlungen des Zoo - 



Auftrage des Vereines fiir Schlesische logisch-botanischen Vereines zu Wien. 



Insektenkunde. W. Zw. — Verzeichniss der Wiirttemberg- 



Sb. W. A. — Sitzungsberichte der K. K. ischen Zweyfliigligen Insekten, von 



Akademie der Wissenschaften zu Wien ; C. L. F. v. Roser. 



Math. Nat. Hist. Klasse. Wlbg.— Wahlberg. 



Schl. Btr. — Beitrage zur Entomologie, be- Wwd., (M. C. I.) — Westwood, Introduc- 



sonders im Bezug auf die Schlesische tion to the Modern Classification of In- 



Fauna. sects. 



Schiim. — Schummel. Wz. — Winnertz, J. 



Stg.— Staeger. Zlr.— Zeller. 



Swam., B. N. — Swammerdam, Biblia Na- Ztt., D. S Zetterstedt, Diptera Scandi- 



turae. naviae. 



In conclusion, it appears from this list that while the history of 

 many of the families is inferred only from the knowledge of that of a 

 few genera in their earlier stages — sometimes from a single example, — 

 and though the extent of that knowledge, in many cases, is very trifling, 

 or little more than sufficient to guide us to further investigation, on the 

 other hand there remain hut three of the families in which we are abso- 

 lutely without anything to be called information in regard to this part of 

 their natural history ; these are, Orphnephilid^: (if, with Professor Eon- 

 dani, we admit the family founded for the single genus Orphnephila), 

 Acrocerid^:, and Lonchopterid^:. As no species of the second of these 

 has been discovered in Ireland as yet, it would be hopeless to expect any 

 elucidation regarding it from observations here. The case is different 

 with respect to the other two, which are comparatively within our 

 reach. The last-named family, in particular, — comprising the single 

 genus Lonchoptera, — seems to present no particular difficulty in the 

 way of the study of its history, as the individuals of various species of 

 the genus are common enough, throughout almost the whole year, 

 among moss, about roots of trees, &c, appearing even in the windows 

 of houses in the town. With a view to excite some of our young and 

 zealous students to observations which may dispel part of the obscurity 

 yet resting upon these subjects, I have laid the preceding list before the 

 Association, along with these cursory remarks. 



additional note on the metamorphosis of some species of diptera, 

 hitherto tjndescribed, or known but imperfectly. by a. h. hali- 



DAY, A. M. 



The larvae of the Stratiomyd^: may be considered as about the most 

 perfectly organized among the Diptera. The well- characterized head, 

 with distinct eyes, and the several parts of the mouth developed in 

 pretty equal proportion, the configuration of the body, with its well- 

 marked segments and firm and elegantly reticulated integument, and 



