70 



which projects caudad between the coxal cavities, and is 

 angularly emarginated at its tip. Laterad of this tongue are 

 two rounding emarginations, for the reception of the coxae. 

 Bounding each coxal cavity laterad is a caudad-projecting 

 portion of the sternum. Cephalad the sternal sclerite tapers 

 somewhat, and the cephalic margin is narrowly truncate. 

 A narrow, collar-like cephalic margin which fits into the pro- 

 thorax, is separated from the rest of the sternum by a slight 

 carina or elevated line. 



Episternum. — The pleural sclerites are distinct ; the epi- 

 steriium is large, angularly concave, and does not reach the 

 coxa. It bears near its cephalic margin two, transversal 

 raised lines or carinae, one of which is a continuation of the 

 collar-making carina of the sternum. Like the sternum, the 

 cephalic margin of the episternum fits into the prothorax. 

 The lateral margin is angularly inflexed along its entire 

 length, as is the case with all the pleural sclerites. The 

 narrow, inflexed portion is covered when the wing-covers 

 are closed by the inflexed, lateral margin of the wing- 

 covers. 



Epimeron. — The epimeron, lying along the caudal margin 

 of the episternum, is a narrow, transversal sclerite. Its 

 mesal extremity does not reach the coxal cavity, but lies 

 contiguous to the lateral margin of the metasternum. 



METATHORAX. 



Dorsal aspect. — When the elytra are closed the meta- 

 notum is completely covered and invisible. By removal of 

 the elytra, the metanotum is revealed as a narrow transver- 

 sal bar, on the surface of which a number of sutures and 

 elevated and depressed lines are to be seen. The work of 

 distinguishing the various component sclerites of the meta- 

 notum cannot be done satisfactorily by the elementary 

 student. There is a conspicuous depression or groove ex- 



