No. 34.] HEMIPTERA OF CONNECTICUT: CICADELLIDAE. 151 



D. fieberi (Loew). Notus fieberi Loew. (Fig. 14, 3a, b, c.) 



Kat. Ostr. Cicad., 39, 1886. 



Vertex produced obtuse and rounded, yellowish with apex of 

 vertex and base of front rather uniformly washed or spotted with 

 orange-red. This conspicuous marking will distinguish it from 

 others of the genus. Length 3.5 mm. 



A very common form throughout the summer in pastures and 

 meadows injuring grasses. It usually occurs in such numbers as 

 to cause severe injury. 



New Haven, 24 May, 10, 14 June, 11, 16 July, 8 Aug., 1920 (B. H. W.) ; 

 Waterbury, 15 Oct., 1920 (B. H. W.) ; Branford, 21 July, 1920; East 

 Haven, 21 July, 1920 (B. H. W.). 



Empoasca Walsh. 



Chlorita Fieber. 



Cybus Douglas. 



Kybos Fieber. 



Vertex varying from slightly produced and broadly rounding to 

 well produced and strongly rounded, or even obtusely angled. 

 The posterior wing with a marginal vein, one apical cell, and 

 second apical area elongate. Species small, some shade of green, 

 usually marked with yellow, white or red. 



The members of this genus are diverse in feeding habits, and 

 while some are always found on trees or shrubs, others are found 

 only on herbaceous plants. Most of these species occur through- 

 out the growing season and are serious pests of fruit, grain, 

 pasture grasses and garden crops. 



Key to Species. 



1. Vertex not produced or very slightly so, usually well rounded. 



(Fig. 14, 10.) 2 



Vertex distinctly produced, often obtusely angled. (Fig. 14, 9.) 9 



2. Elytra green with black or dark markings in form of stripes or 



bands 3 



Elytra green without dark markings in form of bands 4 



3. With three transverse dark bands, one on pronotum and two on 



elytra trifasciata 



With dark stripe along elytral suture, extending upon pronotum 



smaragdula 

 Vertex distinctly produced, often obtusely angled. (Fig. 14, 9.) 9 



4. Last ventral segment of female produced and without incisions, or 



notched only on sides of produced segment 5 



Last ventral segment of female notched at middle 7 



5. Robust, green unicolorous or without dark markings 6 



Deep green, claval suture blue, a black spot before cross veins, 



vertex pronotum, and elytra marked with reddish orange unica 



6. Sides of last ventral segment of female incised or notched, vertex 



evenly rounded and with yellowish markings, length 5 mm 



aureoviridis 



