40 neuroptera. 



First tribe. Things not similar ; the posterior 

 dilated at the base. 



First division. Lower lip smaller than the palpi. 



First sub-family. Eyes simple, not prolonged pos- 

 teriorly: LlBELLULINA. 



Genus Libellula, Linne. 



A. With 10 — 16 antecubital neryures ; large 

 species; abdomen broad and depressed. 



f. 4 ROWS OF POST-TRIGONAL cells. 



1. L. quadrimaculata, L. ; Steph. ; Revue, p. 7. Ey. 



pi. 17, fig. I, -2. 



Length 19 lin. ; exp. 32 lin. 



Habitat England, Scotland, Ireland generally. 



Olivaceous, villous ; sides of the thorax yellowish, 

 streaked with black ; abdomen rather conical, black 

 towards the tip; wings yellowish at the base; the 

 pterostigma, a spot in the middle of the costal mar- 

 gin of the anterior, and a triangular spot at the base 

 of the posterior, black. 



Tar. Tip of the wings brown. L. prcenubila Xew- 

 man. 

 f f, Three rows of post-trigonal cells. 



a. A blackish triangular spot at the base of the 



POSTERIOR WIXGS. 



2. L. depressa, L. ; Steph. ; Revue, p. 8. Ev. pi. 16, 



figs. 1, 2. 



Length 19 lin. ; exp. 32 lin. 



Habitat England, Scotland, Ireland ; generally. 



Olivaceous, villous; abdomen very broad and much 



