j6 MAINE AGRICULTURAL EXPERIMENT STATION. I916. 



Since this species has been found in every timothy field of 

 over two years standing and in many cases has been found in 

 great abundance it must be credited with a considerable share 

 in the drain caused by leafhoppers. Its most serious attack 

 must naturally occur during the growth of the larvae from 

 the middle of June to the middle of July, which coincides with 

 the time when the hay crop should be making its most rapid 

 growth. 



Suggestions for Control. 



Evidently the most important feature in control for this 

 jpecies is the rotation of crops and, since the species seems to 

 migrate less readily than some of the other forms, this should 

 be effective on fields that are not allowed to remain in grass 

 for more than three or four years. Since the species hiber- 

 nates in the field and in all probability is represented in the egg 

 stage in stems or leaves of grass, burning where this is practi- 

 cable should be effective. The insects do not jump quite as 

 readily as some other forms and might not be collected as com- 

 pletely by the hopper dozer as with some other forms but a 

 proportion could be secured in this manner and, if the process 

 is used for the leafhoppers in general, it would assist in reduc- 

 ing their numbers. 



Chlorotettix unicolor. 



This species was noted as quite abundant, especially in low 

 ground and on the rank grasses in the southern part of the 

 state. It is one of the largest of the leafhoppers and when 

 occurring in abundance must occasion considerable loss. Its 

 life history has not been traced entirely through the year but 

 the nymphal stages have been observed and a description and 

 figure will assist in further recognition of the species. The 

 nymphs observed were evidently in the final instar and have 

 the length of 8 mm. They are light green in color closely 

 matching the color of the grasses on which they occur. The 

 wing pads are yellowish and extend on to the basal segment of 

 the abdomen. The head is somewhat fuller than in the adult 

 stage, and the abdomen tapers from near the base to quite an 

 acute tip. The nymphs occur most abundantly in July and dur- 



