U)LS] Tlwracic Sclerites of IIemip>tera 231 



(the upper) and hypoepimeron or katepimeron (the lower) by 

 Crampton, 1908, 1909. The same writer (Crampton, 1914B) 

 has used the term pteropleurite for the upper part, this being a 

 modification of Osten-Sacken's, 1884, term pteropleura of the 

 Diptera. It seems reasonable, if we decide on the prefixes 

 ana- and kata- for the two divisions of the episternum, to 

 employ the corresponding terms anepimeron and katepimeron 

 in this instance. These terms are both self-descriptive and 

 logical, while pteropleurite might be taken to mean a part of 

 the episternum. 



The connection of the epimeron with the postscutellum 

 (i. e., the postalare) has already been mentioned. This is always 

 strongly fused with the epimeron and usually no suture is to 

 be seen between the two. A postcoxal bridge, the postcoxale 

 (poc), connects the katepimeron with the sternum. Above the 

 epimeron at the wing base two plates, the anterior (asa) and 

 the posterior subalares (psa), occur, supporting the anal region 

 of the wing. The trochantin (tn) of the mesothorax is semi- 

 circular and rather broad. A continuation of the pleural suture 

 in the coxa partly marks off the meron (me) from the 

 veracoxa (vex). 



Sternum. Figures 2 and 4. The mesosternum consists of 

 but two well defined sclerites, the basisternite (bs) and the 

 furcasternite (fs). 



Smith and Grossbeck, 1907, in figuring the ventral view of 

 Cicada tibicen, have apparently misinterpreted the parts of the 

 prothorax and the mesothorax. In a figure similar to the 

 writer's Figure 2 they have called the mesothoracic anepister- 

 num (aeso) the proepimeron; they have designated the meta- 

 thoracic katepisternum (keso) as the entire mesosternum; the 

 mesothoracic anepimeron (aem2) has been called mesoepister- 

 num; and the mesothoracic katepimeron (kemo) has been 

 termed the entire mesoepimeron. The median sclerite (meso) 

 of the mesothoracic episternum is labelled proepisternum. A 

 comparison of the ventral view with the lateral aspect of the 

 thorax of this insect will instantly establish the true relation of 

 these parts, though it may not be apparent from the ventral 

 view alone. 



Metathorax. 



The metathorax is similar in general make-up to the 

 mesothorax. 



