8394 Insects. 



[When my kind friend M. Guenee applied to me for specimens of 

 our British Lithosise, I sent him two which I had received from Mr. 

 Greening some time previously, which differed considerably from the 

 specimens of L. complana found at Epping. Soon afterwards I 

 received a letter from M. Guenee, in which he said that he believed 

 they were distinct, and proposed the name " molybdeola " for the 

 northern insect, with a request that I would not publish it before his 

 Monograph appeared. At this time I believe no one in this country 

 was aware that there was any difference between the northern and 

 southern specimens. — H. D.] 



Sp. 14. LlTHOSIA PLUMBEOLA. 



Albin, pi. 70, e, h. (1749) ; Hb. 100; Herr.-Sch. p. 158 = Lu- 

 rideola, Zinc. ; Somm. Ally. Litters. 1817, p. 68 ; Treits. Sup. 

 x. p. 162 ; Frey. pi. 637 ; Dup. Gn. Chenilles = Complanula, 

 Bdv. Ic. p. 97 ; Dup. Sup. p. 15, pi. 1, fig. 4 = Complana <?, 

 Esper. pi. 92, fig. 7 (non 8) ; Haw. p. 147, No. 3 ; Wood, 100. 



Alae anticae latiusculae, costa post medium convexa, margine rotun- 

 dato, saturate nmrinae, vitta costali lutea versus apicem acutis- 

 sima, fimbria strigaque basali luteis. Alas posticae ochraceae. 

 Caput fulvum. Collare griseo maculatura. Thorax abdomeu- 

 que murina, segmento anali apud marem, apice ani apud fcemi- 

 nem, luteis. 



This Lithosia, the most common except L. complana, and in many 

 countries even more abundant than that species, is without doubt 

 nearly allied to it ; but it is going much too far to say that the larvae 

 alone will distinguish them. The form of the wings is very different, 

 and, above all, the absence of the fascicle of subcostal scales is suffi- 

 cient to separate the two species with certainty. 



The larva is black, with a spiracular stripe of reddish yellow ex- 

 tending from the 3rd to the 10th segment. It associates with L. 

 complana, and has the same habits. 



Sp. 15. Lithosia griseola. 

 Le manteau borde, Engr. 303, a, b, c, d (1788) = Griseola, Hb. 



97 ; Och. p. 128 ; Haw. p. 147, No. 2 ; Sepp. iv. pi. 16 ; Frey, 



pi. 380, fig. 2 ; Steph. p. 96 ; Bdv. Ic. p. 95, pi. 57, fig. 5 ; 



Dup. Sup. p. 24, pi. 1, fig. 3 ; Wood, 102 ; Herr.-Sch. p. 160. 

 Magna. Alae anticae latae, costa valde convexa, supra plumbeae, 



sericeae, fimbria pallidiore, vitta costali luteo-diluta, ante apicem 



