3S THE CANADIAN ENTOMOLOGIST. 



Colour green, yellowish beneath and on scutel ; anterior edge of 

 pronotum and basal angle of scutel with faint indications of rufous. 

 Abdomen above, except margins of segments, black. Elytra whitish- 

 translucent, costa at base sometimes greenish. Length, 3.5-4 mm. 



The above description was made from a male and female collected 

 at Lakeland, Md. (F. C. Pratt). These do not fit the original description 

 exactly in the form of the male genitalia, but the difference is not specific 

 and the specimens are otherwise typical. I also have specimens before 

 me from SalineviJle, Ohio (Cornell Univ. Coll.); Washington, D. C. 

 (Heidemann); Ag. Coll. Miss. (H. E. Weed). Specimens from the 

 collection of the 111. State Lab. Nat. Hist, bear the following data :— 

 April 21, on rye ; May 7, on strawberry ; May 9, on blue-grass ; June 

 22, on wheat. The species was originally described from New Bruns- 

 wick, N. J. (Smith). 



Gnathodus imp ictus, vzr. Jlavus, h. var. 



Slightly larger and more robust than typical impidus. Colour 

 yellow or greenish-yellow throughout, including the subhayline elytra 

 towards the base. Also varying from typical impictiis in the forni of the 

 vertex, face, and male genitalia. 



Described from three large series of specimens. The first from 

 Ithaca, N. Y., (Cornell Univ. Coll.). The second from the collection of 

 Mr. Chas. Hart (Illinois: — Ace. Nos. 500-512-514-522-525-526-530-535). 

 The third from the collection of the 111. State Lab. Nat. Hist., bearing 

 data as follows: — May 15; June 17, on weeds; June 26, on clover; 

 July 2 to 25. 



This is one of the most puzzling lot of Jassids that has ever come 

 to my notice. The variation in colour, form, and structure seems extreme, 

 and yet is gradual throughout the whole series. The vertex varies from 

 scarcely at all produced to distinctly produced. The valves in the male 

 vary from not at all produced to the typical form, though the character of 

 the tips is the same in every case. The specimens from Illinois are 

 mostly entirely yellow, though greenish forms occur. On the other hand, 

 those from New York are mostly distinctly greenish-yellow, the yellow 

 forms being rare. 



Gnathodus ??iedius, n. sp. 



Female : Head narrower than the pronotum. Face about a twelfth 

 wider than long. Front two-fifths longer than wide, length little more 

 than twice that of the clypeus. Clypeus with sides straight, gradually 



