FAMILY ZYGiENID^D. 31 



inwards to meet it. Subcostal and median nervules as described 

 in the primaries. Submedian most often present. 



The trochanters are very nearly vertical, or in the slender- 

 bodied genera much inclined, and are then long and slender. 

 Legs long and slender, all the joints slender, and of very uniform 

 thickness ; the tibial spurs are small, the tarsal joints long, very 

 slowly diminishing in size. 



The abdomen is hardly twice as long as the head and thorax 

 together, generally stout and obtusely pointed at the tip, which 

 is rarely tufted ; sometimes slender. The scales that cover the 

 body are fine and powdery ; on the wings they are especially 

 so, and are often absent in the middle, making them transparent. 

 Moths of this family are of brilliant rich and gay colors, being 

 of different hues of green, deep blue, black, black and white ; 

 red and brown, yellow and black, and white and red with bright 

 bands and spots. The crust of the body is often shiny black. 



The characters of the typical larvse and pupse have been con- 

 sidered under those of the family, and farther on in the descrip- 

 tion of Ctenucha. 



Harrisina nov. gen. 



Under this name may be placed the Procris americana of 

 Dr. Harris, Aglaope coracina Clemens and another undescribed 

 form from the middle states communicated by Mr. F. G. San- 

 born. Without attempting to improve upon Dr. Clemens' ex- 

 cellent description of this genus*, we would merely point out 

 some marked differences from Procris Fabr. and Aglaope 

 Latr. From the latter genus Harris statesf that the amer- 

 icana entirely differs. With Fuessly's figure of Latreille's 

 infausta from Southern Europe before us, which has broad 

 wings and bright colors, and differs throughout, we are con- 

 vinced of Boisduval's mistake in referring our species to it. 



However it differs nearly as much from Procris vitis and 

 allies of Europe. The wings are a third longer and much nar- 

 rower, the apex is much more rounded and the outer margin 

 much more oblique. One of the best distinctions lies in the 

 very ovate secondaries of amei'icana, owing to the convex outer 



* Contributions to American Lepidopterology, vn, p. 533. 

 t Loc. cit. p.33. 



