LEAFHOPPERS OF MAINE. 89 



This species is light colored the head, pronotum and scutellum yellow 

 and the elytra light tawny. The front is full and with vertex and 

 pronotum forms an almost globular front end. 'Length 4-5 mm. 



Very abundant, particularly on birches, but has been taken on ferns 

 and other roadside plants and on oaks but always near birch which is 

 doubtless the normal food plant for the larva. Records for Orono on 

 June 3 and Aug. 5, N. Harpswell Aug. 12, Highmoor Farm Aug. 15, 

 and the species apparently disappears for this region about the middle 

 of August as it has not been taken later. No specimens were secured 

 in the northern part of the state in 1913 but this may have been on 

 account of its being out of season. A record for Auburn July 18 is 

 furnished by Mr. C. W. Johnson. 



Oncopsis cognatus Van Duzee. 



Bythoscopus cognatus Van Duzee, Trans. Am. Entom. Soc. VI 224, 1890. 



This is a large species, gray in color, with rather indefinite markings 

 resembling fenestratus but with different genital segment. Length, 5 mm. 



A series of specimens taken from hazel in June by Mr. Shaw are 

 referred to this species. It appears to come at an earlier date than 

 many of the other species and if the hazel is a regular food plant it 

 may be counted as a well separated species. 



Owing to the small economic value of the food plant it can hardly be 

 counted of much importance and so far it seems to have been found 

 in rather small numbers. 



Oncopsis nigrinasi Fitch. 



Athysanus nigrinasi Fitch. Homop. N. Y. State Cab. 1851, p. 61 ; 

 reprinted in Lintner, 9th Rep't, 1893, p. 401. 



Usually marked by the conspicuous black color of the front. Length 

 5 mm. 



Van Duzee says. "June to August. Abundant everywhere on horn- 

 beam," (Buffalo, Hemiptera p. 195), but the specimens we have referred 

 to this species, collected by Mr. Shaw are from . hazel. Aug. I and 

 Aug. 7, and viburnum July 22. There is also a record for July 28 and 

 31, but without note of food plant. 



Pediopsis viridis Fitch. 



Pediopsis viridis Fitch. Homop. N. Y. State Cab. 1851, p. 59; 

 reprinted in Lintner, 9th Rep't, 1893, P- 399- 



Uniform greeq without marking, its color blending perfectly with 

 color of the willow on which it lives. Length 4.5 to 5 mm. 



Often very abundant and its distribution in Maine evidently covers 

 the entire state as specimens have been taken at Orono, July 22-30, 

 Portland, Aug. 13, Mt. Katahdin Aug. 22, Houlton, Aug. 24, Mars Hill 

 Aug. 25. 



