LEAFHOPPERS OF MAINE. 95 



Idiocerus sutitrahs Fh. var. hinaris Ball. 



Resembles suturalis of the typical form except that there is a con- 

 spicuous cross or lunate interruption of the black sutural stripe. Length 



6 mm. 



Occurs along with suturalis on willows and occasionally on poplars 

 Orono Aug. 7th, Highmoor Farm Aug. 15th, Houlton Aug. 24th, Ft. 

 Kent Aug. 28th. 



Idioccnis dusei Prov. 



Idiocerus duzei Provancher, Pet. Faune, Ent. Can. Ill, p. 292, 1890. 

 One specimen of this species recorded from the collections by Mr. 

 O. O. Stover. It is a large light yellow species with golden iridescence, 



7 mm long a little larger than suturalis and without the black sutural 

 line. 



Idiocerus lachrymalis FitcH. 



Idiocerus lachrymalis Fitch. Homop. State Cab. p. 58 (1851). 

 Idiocerus lachrymalis Osborn and Ball. Pr. Dav. Acad. Sci. VII, 130. 



A large gray species with distinct transverse line on front of vertex 

 and with two conspicuous black round dots on vertex. Length 5 7 mm, 

 $ 5.5 mm. 



This is a common species on poplars apparently favoring the aspen 

 and has been taken at Orono July 30th, Houlton Aug. 24th, Ft. Fairfield 

 Aug. 26th, Ft. Kent Aug. 28th. Mt. Apatite collection Bost. Soc. Nat. 

 Hist. In some cases it is plentiful enough to be considered injurious, 

 the larvae especially draining the trees during the early part of the 

 simimer. 



Idiocerus provancheri Van Duzee. 



Idioceriis provancheri Van Dtizee. Buf. Soc. Xat. Hist. Bull. V. 194 



(1897). 

 Idiocerus provancheri O'sborn and Ball Pro-c. Dav. Acad. Sci. VII, 127. 



This handsome species is chocolate brown with a bright yellow oblique 

 spot across the base of the clavus. Length 6 mm. 



iFrom earlier observations this is said to occur on different species of 

 Crataegus but our collections in Maine were in all cases made where 

 this tree was not seen and I believe it must have other food plants. At 

 Orono it was taken in the Bangor bog among the scrubby growth of 

 bushes and conifers. 



AgalUa 4-punctata Prov. 



Bythoscopus 4-punctata Prov. Nat. Canad. IV, 2,76, 1872. 

 Agallia 4-punctata Van Duzee. Entom.. Amer. V, 167, 1889. 

 Agallia 4-punctata Osborn and Ball. Proc. Dav. Acad. Sci. Vol. VII, 

 p. 48. 



