Of the habits and ceconomy of this group I am ignorant, but 

 the typical species as well as that before us are well distin- 

 guished by the form of the underwings, which are suddenly 

 acuminated, somewhat like the wings of a Swallow. The spe- 

 cies recorded are : 

 1. Silacea Hww. p. 555. S6.—JVilh's But.pl. l.f.a.JO?— 



Silacella Hiib. ? pi. 17. f. H?. 



" Superior wings subochreous, with 2 remote little fuscous 



dots on the disc, one behind the other, inferior wings fuscous, 



shining : 7 to 9 lines in expanse." Haxv. 



Although Mr. Haworth refers to Hlibner's figure, I doubt 

 if it be his insect, as not only do the spots and colour of the 

 wings differ, but the palpi if correctly represented are more 

 clavate. 



Beginning of June Coomb Wood, and end of July near 

 Brockenhurst. The Caterpillar feeds on willows. 



2. rufescens Haw. 555. 37. 



" Superior wings shorter than in the preceding, and more 

 obtuse or subtruncated, entirely rufescent, immaculate: 

 posterior fuscous-white, cilia yellowish : 7^ lines." Haw. 

 The New Forest in August. 



3. nebulella Step. III. 4. 221. 3. 



Superior wings pale griseous-fuscous, clouded with brown, 

 with a whitish subtrigonate spot on the costa near the apex ; 

 inferior wings very narrow, cinereous brown : 5^ to 6^ lines. 

 July, near Brockenhurst, in the New Forest. 



4. ochroleucella Step. 4. 221. 4. 



Superior wings pale ochreous, obscurely clouded ; inferior 



wings brownish : 6 lines. 



" End of July, near Ripley, Surrey." Step. 



5. lucidella ,S/^;?. 4. 221. 5. 



Superior wings with the apex somewhat acute, shining, gri- 

 seous-fuscous, immaculate ; inferior glossy black : 7 lines. 

 Found with No. 3 in the New Forest. 



6. falciformis Haw. 555. 38. 



" Superior wings subfalcate, cinereous or somewhat gri- 

 seous, with irregular confluent fuscous lines or stre?ks on 

 the disc: cilia umber -coloured; inferior shining, fuscous 

 lead colour : 6 lines." Haw. 

 Taken in July in Norfolk and near London. 



7. Cytisella Curt. Brit. Ent. pi. 671. 



I took a specimen of this distinct species the 18th July on a 

 hill at Glengariff'in Ireland, and Mr. Walker gave me one 

 which he met with in the Isle of Wight. Mr. Bentley having 

 observed that it frequents the broom in the vicinity of Lon- 

 don, I have given it the specific name of Cytisella. 

 The Plant is Artemisia vulgaris, Mugwort. 



