LAEA^AL FORMS OF COLEOPTKEA 



Plate 81 



Thyoscidae (A-D), Melasidae (H-Q) 



A. 



B. 

 C. 

 D. 

 E. 



Thrusciis sp. (possibly Aiilo- 

 iiothroscus constrictor Say) 



Head. Dorsal view. 



Head. Ventral view. 



Larva. Lateral view. 



Head and thorax. Ventral view. 



Unidentified larva combining 

 characters of Oestodinae 

 and Throscidae. (In de- 

 cayed red oak from Bent 

 Creek, Asheville, North 

 Carolina) : 



G. 



G * " " 



H. Melasis rufipennis Horn. 



J. 



K. 



L. 

 M. 



N. 



0. 



P. 



Q. Palaeoxenns dohrni Horn. 



Head and prothorax. Dorsal 

 view. 



End of abdomen. Lateral view. 



Head and prothorax ; st, sternel- 

 Inm. Ventral view. 



Right mandible. Ventral view. 



Antenna. 



Left mandible. Ventral view. 



Left mandible. Dorsal view. 



Ventral mouthparts. Ventral 

 view. 



Head and thorax. Dorsal view. 



Larva. Dorsal view. 



Mesothoracic spiracle ; dnct, 

 ductus from spiracular open- 

 ing to the atrium of the spira- 

 cle ; or, spiracular opening ; 

 peritr, peritrema ; tu, airtube. 

 Exterior view. 



Head, prothorax, and meso- 

 thorax. A^entral view. 



Larva. Lateral view. 



Larva. Ventral view. 



248 



