ERIOPTERA. 1G1 



the first, a small dot, is on the humeral cross-vein ; the second at 

 the origin of the prasfurca ; it does not reach the costa ; the. third 

 runs from the costa, across the subcostal cross-vein to the prre- 

 furca ; the fourth spot is large, and lies between the costa and 

 the inner end of the first submarginal cell ; the fourth, equally 

 large, covers the tip of the first longitudinal vein ; cross-veins 

 infuscated and clouded ; tips of all the longitudinal veins, except 

 the third, with small brown clouds ; the third posterior cell is 

 square at the inner end, and emits a long stump of a vein from 

 the angle of this square inside of the discal cell ; in some speci- 

 mens this stump reaches the opposite side of the cell, and thus 

 divides it in two. 



Eab. Washington, D. C. ; New York ; Illinois (LeBaron) ; 

 Wisconsin (Ulke) ; usually in the spring. 



The male forceps of this species (Tab. II, fig. 14, 14 a) is dis- 

 tinguished by long slender horny processes (compare the descrip- 

 tion in the explanation of the plates). 



2. The anterior branch of the fourth longitudinal vein is forked (in 

 other words, when the discal cell is open, it coalesces with 

 the third posterior cell) ; when the discal cell is closed the 

 inner ends of the second and third posterior cells are nearly 

 in one line : subgenus Mesocyphona (compare p. 152). 



11. E. caloptera Say. % and $>. — Alis fuscanis, guttis, guttulisque 

 limpidis. 



Wings brownish, with hyaline spots and smaller dots. Long. corp. 0.15 — 

 0.25. 



Syn. Erioptera caliptera Say, Journ. Ac. Nat. Sc. Phil. Ill, p. 17, 1. 

 Erioptera caloptera Wied. Auss. Zw. I, p. 23, 1. 

 Erioptera caloptera 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 226. 



Brownish-yellow, thorax with a whitish tinge above, and with 

 two distinct, dark brown stripes ; similar stripes on the pleurae ; 

 one above, another in the middle, and a third, less distinct one, 

 along the coxae ; feet whitish, with a brown band before the tip. 

 of the femora. Wings brownish (which color is more intense on 

 their anterior portion), covered with numerous white spots ; 

 those along the margins are larger, especially on the anterior 

 one ; those in the apical portion of the wing in the submarginal 

 and posterior cells (except the fourth) are smaller, numerous, 

 and crowded together ; a hyaline band over the central cross-veins. 



XI August, 1868. 



