58 



SYNOPTIC TABLE OF THE STIRPES OF THE FIRST 



STIRPES. 



Stirps I. 

 VERMIFORM. 



The reader is referred to the 

 diagram contained on the third 

 plate, where several of the 

 typical forms of the larvae of 

 the genera arranged in the 

 sixth column are represented, 

 with the view to illustrate the 

 second column. 



ANALOGY, 

 to the class of Ametabola, Macleay. 



VERMES. 



Genera, 

 in the order of their affinity, illustrating the 

 analogy to the larvse of the Papilionidas. 



Entomoda, ^Epi^,aria, Lamarck. 



AscARis, \E,itozoa. Rudolphi. 

 Stkongylus, J "^ 



Oniscus, "J 



Armadillo, VOniscidcs. 



PORCELLIO, J 



(The three genera last enumerated have their 

 natural station between the Ametabola and the 

 Crustacea ; it is remarkable that the analogy is 

 more apparent in the osculant group of Oniscidce 

 than in many of the true Vermes.) 



CHILOGNATHA. 



Glomeris. 

 (As to the affinity between this genus and 

 Porcellio, see Horse Entom., p. 348.) 



Stirps II. 



CHILOGNATHIFORM 



or 



lULIFORM. 



luLUS. 



METAMORPHOSIS. 



Larva, transversely striated, oblong, attenuated 

 at both ends, convex or cylindrico-gibbous, 

 in some cases depressed ; head small and re- 

 tractile ; Jeet short, and generally concealed 

 by the scutiform segments of. the body. 



Pupa, smooth, obtuse at both ends, attached 

 by the caudal extremity with the head up- 

 wards, and secured in an erect attitude by a^ 

 brace. 



Pupa, attached and suspended as in the Ver- ■ 

 raiform stirps, angulated, with two processes 

 at the anterior extremity. 



Larva, elongated, cylindrical, attenuated at the 

 ends, somewhat distended about the fourth 

 segment, with the head attached by a small 

 articulation, appearing, tuhen exserted, distinct 

 Jrom the body, with ^furcula or bifid, Jleshy, 

 retractile organ, between the head and neck. 



POLYDESMUS. 



Craspedosoma. 

 (At the confines of the next order.] 



