362 Annals Entomological Society of America [Vol. XI, 



which he calls the " metatergite " is apparently the sclerite "js" 

 and "po" together. In his Fig. 274 of the metanotum of 

 Acridium, Berlese terms the tegula "tga" the "acroptero," and 

 designates the ossicles "nps" and "ms" together as the 

 "proptero." The sclerite "a" he terms the "mesoptero," and 

 designates the region "bs" as one of the "capi delle nervature 

 delle interala." 



The Pleural Region. 



The lateral cervical sclerites "Ic" (Figs. 1 and 2) are inter- 

 preted as the episternum and epimerum of the labial segment 

 of the head by Comstock and Kochi 1902 in their Fig. 20 of the 

 lateral neck plates of Melanoplus (see also Fig. 26 of Melanoplus 

 by Hosford, 1913); but, in a paper dealing with the nature of 

 the neck sclerites (Crampton, 1917) it was shown that these 

 plates are merely detached portions of the prothorax, and 

 therefore cannot represent the episternum and epimeron of the 

 labial or any other segment. 



In his Fig. 7 of the mesopleuron of Acridium, Jordan, 1902, 

 calls the region "ae" of Fig. 1 (of this paper) the "parasternum " 

 (a term previously applied to a different region by Heymons 

 and others) ; but in other instances, Jordan applies the term 

 "parasternum" to the basalar plates "ba." He terms the 

 sclerite "pr2" (Fig. 1) the "peristernum" in the pleural region, 

 and designates its median ventral portion "pr2" of Fig. 2, as 

 the "mesoclidium," although it is not homologous with the 

 sclerites which he designates as the "mesoclidium" in his 

 other figures {e. g., his Figs. 17, 19, etc., in which the'"meso- 

 clidium" appears to represent the region "ss" of Fig. 2 of this 

 paper). Comstock and Kellogg, 1902, call the region "pr2" 

 the "sternellum." 



Berlese, 1909, designates the basalar plates "ba" (Fig. 1) 

 as the "due meta dell' acrosterno o prefulcro," while he terms 

 the sclerites "ia" the "endoptero," and "sa" the "paraptero." 

 Snodgrass, 1909, also appears to think that these plates at the 

 base of the wing are the "paraptera," since he calls the anterior 

 ones "ba" the "episternal paraptera" and the posterior one 

 "sa" the "epimeral parapteron," but, as was pointed out in a 

 paper dealing with the application of the terms parapteron, 

 hypopteron, etc. (Crampton, 1914b) the designation parapteron 

 is a synonym of tegula alone, and is so used in practically all 

 textbooks of Entomology. 



