4 GEO. H. HORN, M. D. 



The other parts figured by Perris are rather diagrams than real ilkis- 

 trations. The accompanying figures will give a fair idea of the imago 

 and the larva, obviating the necessity for a very detailed description. 



The head of the larva is remarkable in its size and the perfection 

 of the mouth ^^arts. It is entirely without trace of visual organs, 

 although it is probable that the post-mandibular tubercle becomes 

 the eye in the imago. 



It is probable that the larva figured on the accompanying plate is 

 fully grown. Two specimens were kindly sent me by Mr. W. G. 

 Wright, one of which will be placed in the Museum of Comparative 

 Zoology at Cambridge, for the use of those who have occasion to 

 studv the instructive series of larvae there acccumulated. 



DESCRIPTION OF PLATE I. 



-Dinapate Wrig-htii, upper view of the female, natural size. 

 -Lateral view of the male, natural size. 



-Antenna of female, the club joints partly restored, enlarged. 

 -Posterior leg of male, viewed from beneath, showing the arrangement 



of the teeth in three series, enlarged. 

 -Larva, natural size. 



-Head of larva probably male, much enlarged. 

 -Antenna of larva, enlarged. 



-Maxillfe, mentum and adjacent parts of larva much enlarged. 

 -Mandible, upper view, enlarged. 

 -Mandible, inner side, enlarged. 

 -Front leg of larva, enlarged. 

 -The claw of front leg, showing its cleft structure, much enlarged. 



