strong tooth, beyond this on the inner edge of each jaw are minute 

 black teeth, the tips forked. The head much broader than die thorax. 

 having an elevated and bent transverse ridge divided in the middle 

 by a broad, deep notch. Thorax broader than long, with the sides 

 nearly parallel. Anterior and middle tibiseeach with three spines on 

 the exterior face ; the posterior tibia- with two; all the legs long and 

 slender. Color a uniform chestnut-brown, smooth and shining; elytra 

 without stria-; breast more or less covered with yellow hairs. The 

 female is rather less in size; the mandibles much less developed, not 

 being more than one-third as long as those of the male: the head nar- 

 rower than the thorax. Length of the male one and one-fourth to one 

 and two-fifths inches. Jaws of male three-fourths of an inch. 

 The well known pinching bug of Southern Illinois : 



lucanus dama — Fabr. 



This species, which is common throughout the State, though never 

 t Fig - 6 - ] very abundant, is very similar in ap- 



pearance to the female of the former 

 species. The jaws of the male are 

 much less, not more than one-third as 

 long, and with but a single internal 

 tooth, and not forked at the tip. Head 

 about as broad as the thorax. The 

 length varies from a little over an inch 

 to one inch and a quarter; its width, as 

 compared with its length, is rather 

 greater than the former ; and the legs, 

 especially the front pair, rather more 

 robust. The color as in the preceding 

 species. 



This species has been unusually nu- 

 Locakus dama, Fabr— after Packard, merous in this vicinity (Carbondale) 

 this season (1875), but I have not ascertained where they resided dur- 

 ing their larva state. 



The larvae of this species, according to Dr. Harris, live in the trunks 

 and roots of various kinds of trees, but particularly those of old apple 

 trees, in willows and oaks. 



Spec. Char. Imago. — The size and coloring is similar to that of the for- 

 mer species, but the jaws are curved only in one direction — toward 

 each other — and are not more than one-third as long as in that species, 

 and with but one internal tooth, and are not forked at the top. Head 

 not so broad, scarcely exceeding the width of the thorax. Legs more 

 robust and spines of the anterior tibiae broader and more tooth-like. 

 Length of the male about one inch and one-fourth ; of the female, a 

 little over one inch. 



This is the common Stan-beetle of Middle and Northern Illinois. 



PLATYCERUS QUEBCUt 



■Web. 



This species, which is much smaller than the two preceding, being 

 only about two-fifths of an inch long, is distinguished by having the 

 jaws thickened, obtuse and many-toothed at the tip ; is of a dark red- 



