LONG-HORNED WOOD-BOEEES. 



167 



of the larger species. They differ from all the other Longicorn beetles, 

 (with a few rare exceptions,) iu having their heads vertical, the front 



[Fi^'. 77.) 



b c 



Saperua BiviTTATA, Say ; tbe Eonndheaded apple-tree borer :— o, larva ; h, pnpa ; c, beetle — after Riley. 



or forehead presenting a prominent angle, and the face falling perpen- 

 dicularly below it, so that when viewed directly from above the face 

 cannot be seen. This position of the head, in connection with their 

 long curved horns, gives to these beetles a fanciful resemblance to a 

 goat, and terms indicative of this similarity often occur in their nomen- 

 clature. They are also distinguished by the rather long and si)indle- 

 shaped last joint of their palpi, especially the maxillaries, and by a 

 little groove almost always found on the inner face of tlieir tibiiv. The 

 grauuhitions of the eyes, which are usually coarse in the Prionides and 

 fine in the Lepturides, and which serve to separate the Cerambycides 

 into two nearly equal sections, are so variable iu the Lamiides as to be 

 of but little value in classification. 



These insects generally remain stationary by day upon the trunks 

 and branches of trees, and often escape detection by the resemblaiu-e 

 which they bear, in the hues and sculpture of their bodies, to the color 

 and inequalities of the bark on which they repose. Their colors are 

 therefore, as a general rule, less vivid than those of the Cerambycides, 

 their prevailing tints being brown and gray. 



This is the most numerous subfamily of Lougicornes, and is said to 

 contain as many genera and species as the other three subfamilies 

 united ; but iu this country they do not appear to be more numerous 

 than the Cerambycides. 



The larvie resemble those of the Cerambycides in being of a nearly 

 cylindrical form, but a little tapering behind, and considerably swollen 

 at the anterior extremity, with a small head, which is retractile within 

 the enlarged anterior segment. These larvie differ, however, from those 

 of nearly all other Longicorn s in being wholly destitute of legs. 



