Mr. W. L. Distant on Ilomoptcra. 311 



2. Metasternum transversely elevated and anteriorly 

 anofularly or subangularly produced. 



C. Head (includiup: eyes) about as wide as base of 



mesonotum ; eyes not porrect Fidicina. 



D. Head (including) eyes) considerably broader than 



base of mesonotum ; eyes porrect, more or less 

 stylate. 

 g. Pronotura about as lonj^ as mesonotum ; tym- 

 panal coverinf^s in J with their inner mar- 

 gins strongly concave Hemisciera. 



gg. Pronotum shorter than mesonotum ; tympanal 



coverings in iS not concave interiorly Majeorona. 



Genus PlIOARNA. 



Froarna, StSl, Stett. ent. Zeit. xxv. p. 61 (1864) ; Hem. Afr. iv. p. 7 

 (1860). 



Type, P. hilarts, Germ. [Cicada). 



Some confusion may arise in separating this genus from 

 Tympanoterpes, Stal (Ann. Soc. Ent. Fr. (4) i. p. 614, 1861), 

 in which the founder had previously placed several of the 

 species which he afterwards included in Proarna^ and which 

 again subsequently, in '^ Conspectus generum " (Bem. Afr. iv. 

 p. 7, 1866), he separates primarily by the moderately erect or 

 curved and non-oblique transverse vein at the base of the 

 second apical vein to the tegmina. 



Proarna Ileidemanni, sp. n. 



Body above and beneath with legs pale virescent ; vertex 

 of head crossed by a prominent black transverse fascia 

 between the eyes ; incisures to pronotum, two small anterior 

 obconical spots to mesonotum, and the tarsi pale fulvous ; 

 tegmina and wings hyaline, extreme bases of both pale 

 fulvous, the venation of both and costal membrane and area 

 to tegmina pale virescent. Head (including eyes) about 

 equal in width to base of mesonotum, eyes slightly projecting 

 beyond the anterior angles of pronotum ; vertex of head at 

 area of ocelli longer than front ; posterior angles of pronotum 

 obtusely angulutely prominent, but not lobately produced ; 

 rostrum just passing the intermediate coxa?, its apex piceous ; 

 opercula not extending beyond base of abdomen ; tegmina 

 with the transverse vein at base of second apical area almost 

 vertical, not oblique. 



Long., excl. tegin., ^ 16-18 mm.; exp. tegm. 43-47 mm. 



Hah. Argentina ( PKf/^/jer, lirit. Mus.)j Paraguay, Sapucay 

 (Heidemann Coll.). 



I have named this species after Mr. 0. Heidemann, of 



