1NSECTA. 5H3 



II. LEPIDOPTERA CREPUSCULARTA. The wings are 

 horizontal in repose, and the under ones are Furnished with 

 a spine under the base at the external margin, which enters 

 a hook on the lower side of the upper wings, as in the fol- 

 lowing division. The antennae are prismatic and fusiform. 

 The Glaucopidae have the antennae bipectinated in the male 

 at least, as Glaucopis, Stygia, and Procris, The antennae, 

 in the remaining genera, are simple in both sexes. The 

 Zygenadse have the palpi slender and hairy, as Zygena, 

 Sesia, and Macroglossum. The Sphingidse have large 

 scaly palpi, as Sphinx, Smerinthus, and Castinea. 



III. LEPIDOPTERA NOCTURNA. The insects included 

 under this division have setaceous antenna, diminishing in 

 thickness from the base to the point. Among these, there 

 are several families, in which the wings, when at rest, fold 

 round the body. The Pterophorid* have the margins of two 

 of the wings, at least, divided into processes at each rib, as 

 Pterophorus and Orneodes. The other families of this di- 

 vision have the four wings entire. The Tinneadee have 

 only two palpi apparent, as Tinea, Yponomeuta, Oeco- 

 phora, Lithosia, and Adela. In the Alucitadae, there are 

 four palpi apparent, as Alucita, Crambus, and Galleria. 

 Other families have the wings at rest, lying upon the body 

 without inclosing it, and by their union form a lengthened 

 triangle. The Aglossadae have four apparent palpi, as 

 Aglossa and Botys. The Pyralidse have only two appa- 

 rent palpi, as Pyralis, Hermenia, and Platyperix. In the 

 third division, the wings do not rest upon the body so as to 

 form a triangle. This extensive family includes the follow- 

 ing genera, Phalsena, Campaea, Noctua, Collimorpha, Bom- 

 byx, Furcula, Hepialus, and Cossus. 



M. SAVIGNY has observed, that, in those cases where the 

 maxillary palpi have only two joints, the proboscis is naked 



