ON THE LARV.E OF THREE COLEOPTERA. 33 



before the tirst one pupated. They were luminous at times, 

 especially when disturbed or handled, but apparently only 

 after passing the last moult. 



The larva mentioned, which pupated on the 14th of May, 

 produced the perfect insect on the 19th of the same month. 

 The pupa was six mm in length, measured in the curved 

 position habitual to it, and was distinctly luminous. The 

 prothoracic disk and the sides of the body were rosy, the mid- 

 dle of back, legs and tip of abdomen clear white. 



SiNOXVLON DECISIVE LeC. PlATE I. FiG. 2. 



Color of larva ( in spirits ) nearly white, head dark chest- 

 nut. 



Form robust, convex, broader and tliicker in the thoracic 

 region, the abdomen slightly recurved. 



Head small, somewhat inferior in position and partially 

 immersed in the thorax. 



iVntennas very short, four-jointed, the first joint very short, 

 thick and heavy, the second short and thick, the third rather 

 long and more slender, the fourth minute, tipped with two 

 bristles. 



Mandibles thick, heavy and strong. 



Maxillae with a large basal piece bearing an an oval inner 

 lobe thickh- beset with fine bris'^les. Palpus three-jointed, 

 the two lower joints heavy, the terminal slender; the entire 

 organ is bristly except the last palpal joint. 



Mentum short, bilobed. the sub-mentum transverse, with 

 rounded sides. Ligula narrow, broader at tip, palpi two- 

 jointed, the terminal joint slender, cylindrical, the basal almost 

 globular. All parts are hairy. 



Prothorax broad, imperfecth' chitinized. with numerous 

 irregular plications or rugosities, spiracle large, lateral in 

 position, between two ridges. 



Meso- and metathorax shorter, soft, without spiracles. 



Abdomen of nine segments, which are transversely plicate 

 making the matter of locating the divisions rather difficult. 



