88 BULLETIN OP THE BROOKLYN ENT. SOC. 



tip, very declivous; semi-circular with a pair of lateral large 

 acinaciform and rugose processes, tips of which turned down 

 and inward. 



Supplementary notes. Maxillae and maxillary palpi of XYLO- 

 PINUS as in Eleodes (fig 2.); molars of mandibles more fully 

 developed, mentum elongate, narrowing towards tip, labruro sub- 

 emarginate. 



Maxillary palpi of TENEBRIONELLUS differ from Eleodes in 

 being narrower at tip. Labrum emarginate, mentum oval and 

 quite large. 



Mentum and ligula of BOLETOTHERUS comparatively broader 

 and shorter than in the other genera. 



GNATHOCERUS has a pigment-spot on the ophthalmic region ; 

 second joint of maxillary palpus with a longer outer bristle, ter- 

 minal (3d) joint of maxillary palpus longer than 1st and 2d joints 

 and tapering toward tip. There is great resemblance in the an- 

 tenna 1 (tig. 16-22), the remarkable exceptions are in Boletotherus 

 (fig. 19) with 2 spines and 4 bristles at 2d joint and in Xylopinus 

 (fig. 20) witli 2 spines at tip of 3d joint. The antenna of Platy- 

 dema is like that of Gnathocerus. 



EXPLANATIONS TO FIGURES. ** 

 Figure. 1. Gularlobe, mentum, ligula and labial palpi of Eleodes. 

 " 2. Maxilla and maxillary palpus of Eleodes. x -gland u- 



lar lobe. 

 3. Maxilla and maxillary palpus of Boletotherus. 

 "' 4. Articulated spine. Highly magnified 

 " 5. Tip of maxillary palpus of Boletotherus. 



6. Natural size of Eleodes eggf. 



7. Pygidium of Blaps. 



