26 



square, almost as long as the scutum in the middle; mctascutuin short, the 

 two halves being united by a very short isthmus. The scutellum is short and 

 crescent-shaped. 



I 'leu in in. — The flanks are very oblique. The coxas and trochantines col- 

 lectively are rather short, thick, and somewhat swollen, though not so much 

 so as in Torlrix. 



Phalanida (Eutrapela transversata, pi. 7, fig. 21, 21c). — We now come 



to mollis in which the thorax becomes more spherical and concent rated than 

 before. This is due to Andouin's law of enlargement of one part of a seg- 

 ment at the expense of an adjoining part. The differences may be best 

 brought out by comparing the thorax of an Eutrapela with a Hadena The 

 entire thorax is longer than in Hadena; the flanks are more oblique. 



Tergum. — The niesosciituni in the median line is about as long as the 

 entire piece is wide. The scutellum is considerably shorter than wide, and 

 does not differ from that of Hadena. The two pieces of the metascutum are 

 widely separated by a distance nearly equaling the width of the scutellum. 

 The latter is very short, transversely linear-oblong rather than crescent- 

 shaped. 



Pleurum. — The epimera and episterna are rather narrower and scarcely 

 as long as in Hadena, while the coxa' and trochantines arc longer and much 

 narrower. The proportions are the same in Anisopteryx pometaria 9, PI 7, 

 Fig. — . 



Nocluidce {Hadena destructor, pi. 7. fig. 15, 15a). — The thorax is shorter, 

 more spherical, and the Hank less oblique than in the Phalcenidce. 



Tergum — Mesoscutum shorter on the median line than broad. The 

 two halves of the metascutum are not so widely separated as in the Phalai- 

 nidce, the distance between them being equal to about half the width of the 

 scutellum. The scutellum is linear crescent-shaped. 



Pleurum — The characters have already been brought out in the descrip- 

 tion of the Phalcenidce. 



Bombycidce { Teiea Polyphemus, pi. 7, fig. 16, 16a). — The thorax in Telea 

 is not, so spherical as in Hadena, while the Hanks are much less oblique,. 



Tergum. — The mesoscutum is shorter than in the Phalasnidce, while the 

 scutellum is equilalerally triangular, being less produced behind than usual. 

 The two halves of the nietascutuin are widely separated, much as mHadena, 

 and the scutellum is much the same. 



