650 Mr. H. T. Stainton on the 



Septum, certainly does not belong to that species, but to the 

 C. Schmidlella described by Frey." 



On the receipt of this letter I put a short notice in the '' Ento- 

 mologist's Weekly Intelligencer," June 16th, 1860 (vol. 8, p. 83) 

 as follows : — 



" Cosmo-pteryx Druryella? Last August I received from Herr 

 Hofmann, of Ratisbon, a larva mining in the leaves of a grass, 

 Hierochloe Australis ; it had not the habit of an Elachista larva, as 

 it ejected its excrement through a hole in the mine, but in personal 

 appearance there was nothing striking about it. The larvas v^'hich 

 I received all died in the winter, but I learn from Dr.^Ottnnar 

 Hofmann that from the specimens of the same larvae, which his 

 father had retained at Ratisbon, several specimens have appeared 

 which closely resemble C. Druryella. That it cannot be our 

 British species, to which I have now restored the Haworthian 

 name (^Eximia), is evident, as that has a pretty red-marbled larva 

 which mines in hop leaves, and the Druryella of Herrich-Schaffer 

 seems to be our insect. Schmidlella, which has also a red-marbled 

 larva, mines in the leaves of Vicia Septum,. The Druryella of 

 Zeller is a totally distinct species, of which the larva is unknown. 

 Possibly there are several new species like Druryella yet to turn 

 up." 



Immediately on the appearance of this notice Mr. Thomas 

 Brown of Cambridge forwarded to me for inspection a Cosmop- 

 teryx, with which I had been much struck when looking through 

 his collection two years previously. 



Mr. Brown wrote as follows : — ■ 



" The mention of Eximia in last week's " Intelligencer " has 

 reminded me of an insect I took some time ago in our fen. I 

 have been told that it is Exirnia, and that the larva feeds on hops ; 

 but there were no hops within a mile of the open fen where I took 

 it, and I enclose it for your inspection, and shall be glad of your 

 opinion." 



Soon after I received from Mr. Farren two specimens of a 

 Cosmopteryx taken in the New Forest amongst bramble, where 

 there were no hops near — these I found to be identical with the 

 species taken by Mr. Brown in the Cambridgeshire fens. 



In the " Intelligencer" of September 22nd, 1860, I published 

 some "Critical Observations on some of the Species of the Genus 

 Cosmopteryx," and I there showed that if we looked at the essen- 

 tial characters of the three known species, and arranged them in 

 a tabular form, we left a space for a fourth species, the characters 

 of which would be precisely those that Mr. Brown's insect pos- 

 sessed. 



