110 



LONG HORNED BEETLES. 



prairie forms they are sometimes yellowish-brown. They possess 

 powerful jaws; the twelve-jointed feelers are in the female rather 

 slender, in the male longer, stouter and toothed; the thorax is 

 short and wide, armed at the sides with three teeth. The leathery 

 wing-covers have three slightly elevated lines each, and are 

 thickly punctuate. The female is a rather bulky beetle, the male 

 much smaller with a shorter body. The illustration, (Fig. 115), 

 shows this beetle in its various stages, and Fig. 116, Plate VI one 

 still in its burrow but ready to leave. 



Fig. 116. — Prioaus laticollis, Drury.— After Riley. 



Another species (P. imbricomis Linn.), or the "Tile-horned 

 Prionus," is also found in Minnesota ; it is similar to 'the one de- 

 scribed, and has the same habits, but is not so common. The 

 early stages are almost identical in appearance, but the male 

 beetle has received the above name because the joints of the 

 feelers overlap one another like tiles on a roof. There is another 



