415 



apex to base of one tegiiicn ; colors are according to the Ridge- 

 wav standard. 



The more one works upon the Fulgorids the more one is 

 convinced of the necessity of using the genitalia for specific 

 distinction. Unfortunately these characters are seldom men- 

 tioned by describers, except in one group of the Delphacidae, 

 and in a great many instances the sex of the insect being de- 

 scribed is not mentioned, or it is wrongly mentioned. There 

 are good characters in both sexes for dividing the Homoptera 

 into groups, and even among the Fulgorids there are good 

 group distinctions which have not yet been fully worked out. 



DERBIDAE. 



Genus Herpis Stiil. 



Ilerpis obscura? (Ball). 



Lamenia obscura Ball, 1902, Can. Entom. XXXIV., p. 262. 



The specimens I have agree with the descriptions of this 

 species as far as the descriptions go, but they are incomplete. 



Anal segment much longer than hroad, gradually constricted to the 

 middle, apex truncate, anus near apex ; length of genital styles twice the 

 width, ventral or inner margin entire, slightly convexly curved, apex 

 produced into a broad, sharp point turned inward, dorsal or outer margin 

 turned at right angle to disk leaving an entire, nearly straight false mar- 

 gin when viewed from outside, the true margin strongly convexly curved 

 on apical two-thirds with a slender projection near the base with its 

 pointed apex at right angles to the stem. 



One pair from Cabanas, P. de R., Cuba, one female from 

 Pinar d. Rio, P. de R., Cuba, September, 1913 ; also one pair 

 from Rockstone, British Guiana, July, 1911. 



My specimens of H. vulgaris (Fitch) is a larger insect, 

 the genital styles are longer in proportion to the width, the 

 apical spine more slender, the dorsal margin more angularly 

 produced and its basal process with two apical spines. 



