138 LEPIDOPTERA. 



gives Sweden and the north of Germany as its localities, and 

 September as the date of its appearance. 

 The larva is unknown. 



Aplasta ononaria, Fuessly. 



For this grand addition to our Geometrician we are in- 

 debted to my friend Mr. Bernard Piffard, who at page 110 

 of the 3rd volume of " The Entomologist's Monthly Ma- 

 gazine," records his capture of it in the Warren at Folkestone, 

 on or about the 18th of last July, amongst Ononis arvensis. 



The following particulars relating to this extraordinary 

 species, fjleaned principally from M. Guenee's work on the 

 PhaJenites, may interest some of the readers of " The 

 Annual." 



The genus Aplasta, Hb. ; H.-S. ; Led. ; Gn. ; Stdgr. ; 

 z=Fidoniay Dup. •,z=Ca'bera, Tr. ; Bdv. is placed by Guenee 

 between Haliay Dup. {Tephrina, Gn. intervening) and 

 Strenia, Dup. {Psamatodes, Gn. intervening). — Staudinger, 

 on the other hand, places it between Scoria, Stph. and 

 Sierrha, H.-S. {Gypsochroa, Hiib., containing but one spe- 

 cies, G.renitidata, intervening between it and the latter.) 



Aplasta is most nearly allied to Te^jhrina, from which, 

 however, it is readily separable, 1™°, by the antennae being 

 simple and velvety in both sexes, and entirely destitute of 

 ciliation ; 2°**°, by the tongue being rudimentary ; 3*'°, by the 

 hind-wings being rounded; 4% by the absence of lines, &c., 

 and besides these it has in other respects a fades peculiar to 

 itself. But the stability of the genus is still more strongly 

 justified by a reference to its larva, which, in the singularity 

 of its shape and downy clothing, differs completely from 

 that of any known Geometer. 



Aj)lasta contains only the one species under notice, Hiib- 



