LEPIDOPTERA. 609 



The third division of Sphinx, Sesiades, comprises those with the antennae always simple, elongate- 

 fusiform, and often terminated by a small bundle of scales ; the palpi are slender, and distinctly 3-jomted; 

 the abdomen is generally terminated by a tassel. The caterpillars devour the interior of twigs, or the 

 roots of vegetables, like those of Zeuzera or Cossus ; they are naked, without any posterior horn, and 

 construct a cocoon with the particles of the materials on which they have fed. 



Sesia, Latr., — 

 Has the antennae terminated by a small brush of scales; the wings are horizontal, and have glassy spaces ; the 

 tail is tasselled. Many of the species resemble Wasps and other hymenopterous and dipterous insects. [Nu- 

 merous small British species, which fly about in the hottest sunshine.] 



Thyris, Hoff., differs in the antenna; being nearly setaceous, and the abdomen pointed. 



Aigocera, Latr., has the antenna; without a bundle of scales at the tip, but thickest in the middle ; the abdomen 

 also pointed at the tip. The wings are entirely clothed with scales. 



The fourth and last division of Sphinxes, Zyg.enides, has the antennae always terminated in a point 

 without a brush, and either simple in both sexes and fusiform, or thickest in the middle ; setaceous 

 and pectinated, at least in the males ; the palpi of moderate size, or small, subcylindric, 3-jointed ; the 

 wings are deflexed, and have, in many, vitreous spots ; the abdomen is not tasselled ; the spurs of the 

 hind-tibiae are small ; the larvae are exposed, and feed on various leguminosae. They are cylindric, 

 without a posterior horn, pilose, like those of many Bombyces, and form a silken cocoon, which they 

 attach to stems of grass, &c. Their habits are well described by Boisduval, in a monograph on this 

 tribe. 



ZYGiENA,— 



The typical genus, is not found in the New World ; the antennae are simple in both sexes ; suddenly terminated 

 by a fusiform mass, and the palpi reach beyond the clypeus, and are attenuated at the tip. [The species are 

 numerous. 



Sphinx filipenduLe, [the Hornet Moth, a very common and handsome species, is the type]. 



Syntomis, Illig., differs in having the antennae slender and gradually dilated ; the palpi are shorter. [Exotic 

 species.] 



Ati/chia, Hoff., has simple antennae in the females, or bipectinated in the males ; the palpi very pilose, and ex- 

 tending considerably beyond the clypeus ; the spurs large. 



Procris, Fab. (Ino, Leach), approaches Atychia in the antenna;, but the palpi are shorter, the wings longer, and 

 the spurs small. S. statices, Linn., [the Forester Sphinx, a very common small species, of a shining green colour j. 



The other Lepidoptera of this division have the antennas in both sexes bipectinated. 



Glaucopis, Fab., has a distinct proboscis. 



Aglaope, Fabr., has not a proboscis. Many species of these two subgenera occur in tropical climates ; they seem 

 to connect the Crepuscularia; with Callimorpha. 



THE THIRD [AND LAST] FAMILY OF THE LEPIDOPTERA,— 



The Nocturna, — 



Presents to us ordinarily the wings bridled in repose by a bristle or bunch of hairs arising at the lose 

 of the outer edge of the lower pair, and passing through a ring on the underside of the upper. The 

 wings are horizontal or deflexed, and sometimes rolled round the body. The antenna; gradually di- 

 minish to the tips, or are setaceous. This family is composed in the Linnaean system of the single 



genus 



Phal.ena [or Moths]. 



These insects in general fly only during the night, or after sunset ; many are destitute of a proboscis; 

 some females are destitute of wings, or have only very small ones. The caterpillars gem rally spin a 

 cocoon; the number of their feet varies from ten to sixteen ; the chrysalides are always rounded, and 

 not angulated nor pointed. 



The classification of this family is exceedingly embarrassing, and our systems are yet but imperfect 

 sketches. We divide it into ten sections. 



The first section, Ili.ei ai.ites, has for its types the genera Ilrpialns and Couut ot r'abririus. The 

 caterpillars are naked and fleshy, and reside in the interior of vegetables, upon which they bid ; their 

 cocoons are for the most part formed of the particles of these vegetables. The segments of the abdomen 

 of the pupae arc denticulated ; the antennae are always short, with only a single sort of small short teeth. 

 In others they are terminated by a single filament, but furnished at the base in i he males w ith a double 



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