6342 



Insects* 



Herrich-Schaffer (fig. 163 and 164) figured, but it has nothing to do 

 with cervina, Germar, and the name must therefore necessarily be 

 changed. Exarnis difflua, Hub. — Geyer, received from Greenland by 

 Somrner, belongs here, without the least doubt. A single undoubted 

 specimen of this species stands in the Royal collection at Berlin under 

 the name of " arctica, ThunbT All the species erected by Guenee 

 (1. c.) into his new genus Crymodes belong here, with the exception of 

 Sommeri, of which, indeed, only one female is known, and it does not 

 bear the characters of the genus. The description of his gelida, and 

 still better the figure, prove that it also belongs here ; yellow as this 

 example is, I possess the species still more yellow. His Poli can also 

 only belong here. To make a genus for itself out of this species has 

 certainly much in its favour. Gronlandica, Freyer, is certainly exulis ; 

 Gronlandica, Zett. I place here only with a ?, because the description 

 also applies to Sommeri. Marmorata, Zett., referred here by others 

 with the greatest certainty, I also place with a ? in the absence of 

 certain proof. Zetterstedt found it in Southern Lapland, but I did not 

 see the species in the Royal Museum in Stockholm. Oleracea, Mohr, 

 can only be referred here, on account of its time of appearance ; 

 conflua which also flies at the end of June, is put by Mohr as 

 Vaccinii. 



I have about four hundred examples of exulis from Iceland, and 

 about twenty from Greenland before me, and scarcely one specimen is 

 like the other in its variation. Also with respect to the variation the 

 examples from Iceland are more important than those from Greenland, 

 which are more uniform and like to each other. The smallest specimen 

 (32 mills.) is a black female from North Iceland (Myvatn) ; the 

 largest is a male from Julianahaab, in Greenland (45 mills.) Those 

 from Greenland are large throughout, the smallest nearly reaches 

 37 mills. The largest of those from Iceland attains only the length 

 of 43 mills., the average is 38 — 40 mills. 



The variations in colour and marking in this species are truly in- 

 credible ; only for the purpose of having the necessary forms of 

 variation I am obliged to keep about one hundred specimens of 

 exulis in my collection. The foregoing short diagnoses of the chief 

 varieties give but a poor idea of the endless varieties themselves ; even 

 the best descriptions could here avail little ; the differences could best 

 be seen by a seres of good figures. But the knowledge of the early 

 state shows thal^ u ^the least doubt of the specific identity of all the 

 above-mentioned sp^ : mens can exist. About two hundred specimens 

 were reared, and further, we often found the varieties of the species 



