European Species of the Genus Cosmopteryx. 653 



" The perfect insect makes its appearance in July, and may then 

 be found running and glistening in the sun on the leaves of the 

 hop. It flies but little and slowly from one leaf to another. 



" I abstain from giving a description of the imago, and refer to 

 figure 1, on Plate II." 



This figure shows very distinctly the black base of the anterior 

 wings, and the apical streak divided into two separate spots. 



In the year 1862 I had the pleasure of pointing out mines of 

 this species at Aix-la-Chapelle to Herr Kaltenbach. 



In 1863, on the occasion of the Meeting of German Naturalists 

 at Stettin, the Micro-Lepidopterists collected there saw with 

 delight in the collection of Dr. Schleich of Stettin, two mag- 

 nificent specimens of Cosmopteryx Lienigiella, which that suc- 

 cessful investigator of Lepidoptera had obtained in a moist meadow 

 to the east of the town ; both had been taken about 7 p.m. whilst 

 flying slowly and steadily (not with the sharp jerking motion of 

 the black species); one was taken on the 16th of June, the other 

 equally fresh on the 23rd of July. 



I trust the day is not distant when Dr. Schleich will discover 

 the larva of this little gem, and enrich our collections with bred 

 specimens of Lienigiella. 



Amongst Dr. Schleich's other interesting captures were speci- 

 mens of our Cambridge fen * insect Cosmopteryx Orichalcea ; of 

 this insect Dr. Schleich had made the following manuscript 

 note : — 



" We took the imago rather plentifully in the summer of 1862 — 

 this year, however, more sparingly — in a moist meadow between 

 Grabow and Bredow. It flies at the end of May, throughout 

 June, and in July, often swarming at evening in the sunshine. 

 Seeking in August industriously for the larva of this species, I 

 found, on the 9th of that month, in the broad leaves of a species 

 of grass, which Herr Apotheker Marquardt has been so good as 

 to name for me Festuca Aruiidinacea, a number of mining larvse, 

 some of them already full-grown, which, on account of their great 

 liveliness and their peculiar way of mining, I perceived at once 

 could not belong to any Elachista. The long mine itself has 

 naturally considerable resemblance to that made by an Elachista 

 larva, but is entirely free from excrement, which is always ejected 



* I should remark thai Dr. Schleich's hunting-ground seems to produce most 

 of our peculiar fen insects. He had also found there Gelechia inonmtella and 

 Pulustreilu, which had not been previously detected on the Continent. 

 VOL. I. THIRD SERIES, PART IX. MARCH, 1864. Y Y 



