36 



HAUSTELLATA. — LEPIDOPTERA. 



Structure (and such seems to be the received opinion by the best 

 writers), the following must necessarily be required to include all 

 the indigenous species, and may be known by external characters, 

 as below : their prevalent tints are griseous or fawn-colour. 





integrae; | 

 omnes -j 



ocellatae : 

 Antennaruni arti- ' 

 cuius singulits 



uniramosus vel unidentatus : 



inocel 

 lata: 

 anticce ■ 



biramosus vel bidentatus ; 

 subdiaphansB, elongatae, C nulla 



macula centrali < 



( alba; 

 'rotun- ( vix hirsuta: 

 datas: 



Cauda < valde ( rectee : 

 hirsuta : 



opacae, sub- 

 abbreviatae, 



postice 



plus minusve 

 denticulatce : Pal 



Antennae - 



I sub-ar- 

 _ cuatffi : 

 subtruncataj, subacutae ; 

 , J sub-breves , 



'■elongata;: i4tea«^ira7-| , f. '. ' 



48, AGhlA. 



49. Saturnia. 



52. PtECILOCAMPA. 



53. Eriogastee. 



50. Lasiocampa. 



51. Trichiura. 



54. Cnethocampa. 



55. Clisiocampa. 



56. eutricha. 



57. Odonestis. 



58. GaSTRO PACHA. 



Genus XLIX. — Saturnia, Schrank. 



Palpi and maxillce obsolete, their place occupied by a dense tuft of hair. Antennoe 

 subcylindric, very short; of the male bipcctinated, the pectinations divergent^ 

 and diminishing in length to the apex of the antennae, each joint of which 

 bears two ramifications internally and externally; female with each joint 

 bidentate: head small, scarcely visible from above: thorax stout, densely 

 pilose ; abdomen abbreviated in the males ; rather elongate and stout in the 

 females, pilose, slightly tufted at the apex : wings broad, horizontally expanded 

 during repose, entire, rounded, posterior ones simple: cilia very short. Larvce 

 naked, with a coloured ring on each segment, adorned with several whirls of 

 hair, placed upon distinct warts : pvpa enclosed in a rigid pyriform folliculus. 



The broad, horizontally extended, subdiaphanous wings of Sa- 

 turnia, which have the cilia so short as to be scarcely perceptible, 

 well distinguish the genus from the rest of this family : and from 

 Aglia, which resembles it in the first particular, the biramose 

 articulations of the antennse and want of palpi separate it. 



Genus XLVIII. — Aglia, Ochsenheimer . 



Palpi distinct, rather short, clothed with scales, compressed, triarticulate, ter- 

 minal joint short, ovate: maxillce obsolete. Aiitennce short; of the male bipec- 

 tinated, each joint bearing a single pectination, the latter diminishing in length 

 towards the apex of the antennse ; female with each joint unidentate, not 

 pectinated: head moderate: Mo /-ffar rather short, pilose: abdomen moderate. 



