SYNOPSIS OF THE GENUS CHLOROTETTIX 27 



The genitalia of both male and female are very much like those 

 of unicolor, while in shape of head and general appearance it is 

 closely allied to lusorius and nudatus. 



The species was described from specimens collected in Moun- 

 tain Valley, Colorado, and has not been recorded for other local- 

 ities. The only specimen I have seen, and which I have had at 

 hand in the preparation of this paper, is the type from Dr. Ball's 

 collection. 



Chlorotettix nudatus Ball. 



(Figs. 26: a, b, c.) 



Chlorotettix nudata Ball, Can. Ent., 32, p. 340 (1900); DeLong, Term. State Ent., 

 Bull., 17, p. 84, (1916). 



Resembling stolatus in form and color ; the vertex is more angled 

 and the fulvous reflection less prominent. Length, 7.5 mm., 

 width nearly 2 mm. 



Vertex twice longer on middle than against eye, slightly con- 

 ically pointed, front shaped as in lusorius, lorae long and narrow. 

 Elytra long, slightly flaring in the middle, appressed behind. 



Color: Pale green, an orange cast on face and vertex, a slightly 

 brownish or fulvous cast on pronotum and elytra; elytra sub- 

 hyaline, the nervures indistinct. 



Genitalia: Last ventral segment of the female short, about as 

 long as the preceding segment ; posterior margin distinctly darker 

 margined and divided into four lobes by a narrow slit in the 

 middle and a pair of broad, shallow notches a little more than 

 half way towards the sides; the margin thin, the plates visible at 

 the base of the pygofers. Male valve narrow, roundingly angulate, 

 as long as the preceding segment; plates broad at base, three 

 times the length of the valve, gradually narrowing to the acute, 

 slightly produced tips. 



The species has only been reported for Iowa and Tennessee, 

 and was described from specimens collected in the former state. 

 It is probable the species has a wider distribution than these 

 records would seem to indicate. Type in collection of Dr. Ball. 



