ENTOMOLOGICAL NEWS 



[Jan., '14 



EXPLANATION OF PLATE III. 

 Fig. I. Mesothorax of the earwig Forficula. 

 Fig. 2. "Ground plan" of typical thoracic segment. 

 Fig. 3. Prothorax of roach. Pleural region as in Periplaneta; ster- 

 nal region as in Ectobia. 

 Fig. 4. Mesothorax of Corydalis. 

 Fig. 5. Mesothorax of stonefly. Pleural region as in Perla; sternal 



region as in Capnia and Leuctra. 

 Fig. 6. Metathorax of roach. Pleural region as in Ischnoptera 



(male) ; sternal region as in mesothorax of Periplaneta. 

 All figures are so oriented that the dorsal region is directed toward 

 the top of the page, and the anterior portion toward the left hand mar- 

 gin, the plate being held sidewise to read the abbreviations. All show 

 lateral views. The coxae are partly cut off in all figures. Black areas 

 denote cavities, or the location of internal processes. 



a, Suture betweeen basisternite 



(Bs) and laterosternite 



(Lst). 



Aba, Anterior basalare. 

 A ex, Antecoxale. 

 Acs, Anepisternum. 

 Am, Pretergite. 

 Asa, Anterior subalare. 

 At, Supraalare. 



b, Suture between antecoxale 



(Acx) and precoxale 

 (Pcx). 

 Bs, Basisternite. 



c, Suture betweeen lateroster- 



nite (Lst) and lateropleu- 

 rite (Lpl). 

 Cm, Coxamarginale. 



d, Suture marking off anepi- 



sternum (Acs). 



e, Suture between episternum 



(Es) and lateropleurite 

 (Lpl). 



Em, Epimeron. 

 Es, Episternum. 

 Fs, Furcasternite. 

 g, Pleural suture (between 

 episternum and epime- 

 ron). 



h, Suture below subalar scle- 

 rite (Asa). 



Hem, Hypoepimeron. 



Hpt, Hypopteron. 



i, Suture dividing epimeron 

 (Em) into upper and low- 

 er regions. 



Ip, Interpleurites. 



Is, Intersternites. 



It, Intertergites. 



Jc, Juxtacoxale. 



Jsl, Juxtascutellum. 



k, Suture between epimeron 

 (Em) and meron (Me). 



I, Meral suture (between me- 

 ron and anterior portion 

 of coxa). 



Lot, Laterale. 



Lpl, Lateropleurite. 



Lst, Laterosternite. 



in, Suture between episternum 

 (Es) and trochantin 

 (Tn). 



Me, Meron.* 



Mph, Mediophragmite. 



Npt, Notopterale. 



Pal, Prealare. 



Pba, Posterior basalare. 



* In the Diptera, the term meroplcurite is applied to the meron 

 united with the lower portion of the epimeron. 



