STATE irORTICULTURAL SOCIETY. 143 



propriety of the formation of the genus. In fact Dr. Fitch, when he 

 first described the following species, placed them in Livia \ therefore, for 

 all practical purposes, the two may be considered as synomyras: 



1. Diraphia vernalis, Fitch. The Vernal Diraphia or Jumping Plant- 



louse. 



Found upon the leaves of the pine during the greater part of the 

 year, puncturing them and sucking their juices. They are of an orange- 

 yellow or bright rust-red color, about (.15) one-seventh of an inch in 

 length, with a square flattened head, concave on its upper side, with a 

 slight impressed line along the middle, and a small notch in the middle 

 of the front. The antennse short and thread-like, about as long as the 

 head ; their basal joint largest, and forming one-fourth of their entire 

 length; their tips black, and ending in two short, fine bristles of unequal 

 length; the fore-wings thick and leathery, feebly transparent, dull, pale, 

 brownish yellow ; the breast coal-black and legs pale. 



2. Diraphia femoralis, Fitch. The Black-legged Diraphia. 



This is probably only a variety of the preceding species, from which 

 it differs only in having all of the thighs of the same deep black color as 

 the breast. Found on pine leaves in July. 



3. Diraphia calamorum, Fitch. The Calamus Diraphia. 



Found on the sweet-flag {Acorus calamus). About one-tenth of an 

 inch long to the tip of the abdomen, and one-seventh to the tips of the 

 closed wings. It is paler than the preceding, being, according to Dr. 

 Fitch, of a dull gray or clay color, with the anterior lobes of the head of 

 a reddish tint, and has no impressed line along the middle of the head. 

 It is black beneath, with the abdomen and legs dull whitish. In other 

 respects agrees with D. vernalis. 



4. Diraphia maculipennis, Fitch. The Spotted -winged Diraphia. 



This is a smaller species than the preceding, being only about one- 

 tenth of an inch long to the tips of the wings. It is of a tawny-red 

 color, the thorax being shaded more or less with dusky; the antennas 

 have a broad black band near the tips. The fore-wings somewhat shorter 

 and broader than in either of the preceding species; hyaline, with a 

 broad smoky band at the tips, a spot back of the shoulder, and some 

 freckles near the margin of the same color ; the marginal and other veins 

 all white, alternating with numerous black rings. The breast, blackish ; 

 legs, dusk or brownish. 



Also found on the sweet-flag. 



Although apparently of but little importance economically, these 

 species, as well as a number of others, are described, not simply to make 

 the list complete, but as a means of illustrating the genus, so that other 



