60 



SYNOPTIC TABLE OF THE STIRPES OF THE FIRST 



STIRPES. 



ANALOGY, 

 to the class of Ametaboi^a, Macleay. 



CHILOPODA. 



Stirps III. 

 CHILOPODIFORM 



, OK 



SCOLOPENDRIFORM. 



SCOLOPENDEA. 



LiTHOBIUS. 



SCUTIGEHA. 



Stirps IV. 

 THYSANURIFORM. 



THYSANUUA. 



Lepisma. 



FORBICINA. 



PODURA. 



Smynthurus. 



METAMORPHOSIS. 



Larva, cylindrical, uiith rigidjiliform appendages, 

 (naked and few in number at the confines of the 

 last stirps, in the typical group numerous,) dis- 

 posed in longitudinal series alo7ig the body and 

 armed with verticilli of acute diverging spines. 



Pupa, angular, oblong, or compressed, diversified 

 on the surface, even, tuberculated, or notched ; 

 the headcase obtuse, rounded, or tuberculated ; 

 ornamented with shining dots or lines, or entirely 

 covered with a golden lustre : suspended by the 

 tail, with the head precipitous or directed down- 

 ward. 



Pupa, suspended as in the Chilopodiform stirps, 

 smooth, shining, often handsomely variegated with 

 colours ; variously modified as to form, oval, an- 

 gular, curved, gibbous, or triangular, with a py- 

 ramidical base and point ; terminated by two acute 

 points, which are either approximate or diverging. 



Larva with a bifid tail orjurcidajrom the posterior 

 part of the abdomen, consisting of two rigid setcs 

 or spines, pointing directly backward; having an 

 elongate cylindrical form, slightly attenuated at 

 both ends; head emarginate above or provided 

 with two erect setae or points in some species 

 greatly distended posteriorly, forming a kind of 

 moveable shield, which is crowned above with 

 four or more membranaceous horns having ser- 

 rate edges. 



