THE CANADIAN ENTOMOLOGIST. 257 



unable to separate this species from MyzocalUs. Mordvvilko also used A. 

 ahii Fab. for his genus Subcallipterus, but as this species is the type of 

 Pierocallis then must Suhcallipterus be a synonym. 



Characters : Antennse slightly longer than the body and without 

 antennal tubercles, spur of sixth segment not more than twice as long as 

 the segment. Forehead formed into a pointed projection supporting the 

 frontal ocelli. Prothorax and body elongated, wings long but variable in 

 width. Nectaries almost as broad as long and tapering. Cauda short 

 globular at the tip and placed on a narrow base. Anal plate shaped like 

 the larger part of a heart and emarginated by a median wide groove 

 Notes taken from American and European species. The following 

 American species belong in this genus : M. punctaius Monell, M. 

 u/mi/o/ii MoneW, M. trifolice Monell, M. alnifolice Fitch, M. discolor 

 Monell, M. getievl Sanborn, Af. ulmicola Thomas, M. asclepiadis Monell. 



Eucalliptertis Schouteden, 1906.* 

 type, A. tilicB, Linnseus. 

 Characters : Antennce slightly longer than the body, slender and 

 tapering. Spur of sixth segment not longer than the segment ; first seg- 

 ment not gibbous on the inner side. Front of head wide and with two 

 frontal tubercles, one on each side of the frontal ocelli, and giving the 

 appearance of three ocelli or tubercles, each side tubercle bears a single 

 bristle. Body tapering, wings long and slender, with dusky markings. 

 Nectaries short and much enlarged at the base, outer part cylindrical, ends 

 irregular as if broken. Cauda three times the length of the nectaries, 

 slightly constricted in the middle and globular at the tip. Base as long as 

 globular part and slightly wider at the base. Anal plate strongly lobed, 

 the lobes forming a regular V. 



Chroviaphis Walker, 1870. f 



type, A. juglandicola Kaltenbach. 

 Characters : Antennae shorter than the body and not placed on 

 antennal tubercles, spur of sixth segment about one-eighth the length of 

 the segment. Forehead wide, with one large tubercle in the centre and a 

 smaller one on each side. At the inner side of the base of each antennae 

 the head is slightly projected. Body short and stout. Wings long and 

 slender. Nectaries short, small, and constricted in the middle. Cauda 

 short, globular at the lip and constricted towards the base. Anal plate 



IThe Zoologist, 1870, p. 2001. 



