20 MOUTH OF INSECTS. 



very remarkable in the stag-beetles (Lucanus cervus) and other 

 species of the genus lucanus ; for example : 



Fig. g. STAG BEETLE. 



"The largest of these beetles in the New England States is the horn-bug. 

 Its colour is a deep mahogany-brown ; the upper jaws of the male are long, 

 curved like a sickle, and furnished internally beyond the middle with a 

 little tooth ; those of the female are much shorter, and also toothed ; the 

 head of the male is broad and smooth, that of the other sex narrower and 

 rough with punctures. The body of this beetle measures from one inch to 

 an inch and a quarter, exclusive of the jaws. The time of its appearance 

 in July and the beginning of August. The grubs (larvse) live in the trunks 

 and roots of various kinds of trees. Several other and smaller kinds of 

 stag-beetles are found in New England." Harris. 



39. In insects that live by suction, the jaws or labrum are 

 elongated in such a manner as to constitute a tubular trunk, in 

 which we often find delicate filaments that perform the functions 

 of little lancets ; they are formed by the mandibles and jaws, so 

 modified as to be scarcely remarkable. 



40. In bees, the anthophorse (from the Greek, anilws, flower, 

 and pherb, I bear), and other insects known to zoologists 



39 What is the peculiarity of the mouth in insects that live by suction? 

 40. What are the peculiarities of the mouth in the Hymeno'ptera ? 



