of the Genus Lithocolletis. clxv 



L. tristigella appears to be a species more attached to northern lo- 

 calities. Here, at Stettin, it was abundant last year, but this winter I 

 bred it far more rarely. It occurs most abundantly at Eckerberg, at 

 Polchow and Vogelsang ; I know of no other locality for it. Tn the 

 room (as well as at large, for I have met with the spring brood) it ap- 

 pears earlier than L. Frolichiella, generally in January, and even at 

 the end of December ; more rarely in February. 



Note. — On account of the great similarity between this species and 

 L. Frolichiella, I have altered the diagnosis of the latter in the follow- 

 ing way : — 



20. L. Frolichiella, Z. Major : alis anterioribus saturate croceis, 

 fantennis albidis fusco annulatis, ante apicem albidis) ; stri- 

 gis duabus subcurvatis strigulisque tribus costce, duabus dorsi 

 argenteis, intr or sum fusco marginatis, apice atro squamato. 



I found this at Eckerberg on Alnus glutinosa and A. incana ; the 

 mined abodes are different on the two plants. Those on A. incana 

 much resemble those of L. tristigella; those on A. glutinosa are more 

 like those of L. alniella, yet far more expanded, placed in many small 

 folds, and containing a fine cocoon, which is white and paper-like, 

 more rarely is it yellow : the large pupa is shining and brown. 



I bred twelve specimens last winter, in a short time, from about the 

 3rd to the 26th of February. As far as I know, it only occurs at 

 Eckerberg, which, in respect to this genus, has produced an abundant 

 harvest of rarities. 



21. L. Kleemannella, Fab. Is very scarce near Stettin, and only 

 found at Eckerberg. It lives upon alder-leaves ; but I have not 

 distinguished the abode of the larva from that of the numerous L. 

 alniella. I obtained one specimen in January, 1849, and a second 

 on February 26th, 1850. 



22. L. lautella, Heyd. This insect, in spite of the longitudinal 

 streak at the base of the anterior wings, must be placed in this section,* 

 and is one of the most beautiful but rarest species round Stettin, where 

 it occurs everywhere, but only singly. I have often bred it, especially 

 in the winter of 1848-49, and certainly at the end of December and in 

 January. In the open air I never met with it, and cannot therefore 

 announce the period of flight with precision ; but it may be concluded 

 from the foregoing that it flies at the same time as those species which 

 escape from the pupa along with it. 



* See on this subject ' Note on the Labours of the Entomological Section, in the 

 Year 1848,' by Professor Gravenhorst, p. 19 : 'Contributions to the Knowledge of the 

 Species of Lithocolletis,' by Dr. Wocke, of Breslau. 



IX. APPENDIX. F F 



