:<-«<{ THB CANADIAN KNTUMULOOIST. 



aboui live limes as long as the sixih. Forehead broad and flat, body short 

 and stout ; wings long and flender. Nectaries very short and tapering, 

 Cauda a knob on quadrangular base. Anal i)iate broadly roiuided. 



Chaitophorui Koch.* 

 Syn. Phyllophorus Thornton. 

 Phyllophora Fernie. 

 Chelymorpha Lane Clark. 

 Ptriphyllus Van der Hoeven. 



type A. acerii Linn. 

 Anicnniv: nearly as long as the body and on indistinct antennal tuber- 

 cles, spur of sixth segment longer than the third, and about six times as 

 long as the sixth segment. Head flat in front, eyes prominent ; wing 

 venation regular. Nectaries six times the length of the cauda. and con- 

 stricted in the middle. Cauda very short, being but a knob. Antennae, 

 legs and body with long hair-like bristles. 



Symdobius Mordwilko.* 



type A. oblon\^us Heyden. 



AntenniE nearly as long as the body, and not on antennal tubercles, 



spur of sixth segment shorter than segment, and much shorter than the 



third segment. Forehead Hjt, .«.lightly elevated ; body short and stout, 



wings long and slender. Nectaries not much longer than the cauda, 



tapering and slij^htly constricted in the middle. Cauda short and broadly 

 rounded, anal plate indistinct. Tip of abdomen broadly rounded; legs, 

 body and antenna; set with very tine hairs. 



Thomas ia, n. gen. 

 type C populicolix Thomas. 

 .Antennae rnuch shorter than the body, and not placed on antennal 

 tubercles. Spur of sixth segment longer than the segment, the third seg- 

 ment being longer than both together. Forehead broad, body short and 

 robust. Wings 1 jng and slender ; nectaries tapering and placed on a 

 broad base, nectaries slightly longer than the sixth segment. Cauda 

 short, thick and broadly rounded. Anal plate if present obscure ; tip of 

 abdomen broadly rounded, but with tip slightly tiattcned. 



Sipha Passer in i.* 

 type .•/. iilyceriie Kalt. 

 Antenna> with five segments, shorter than the body and not placed on 

 antennal tubercles. Spur of fifth segment not longer than the segment, 



). Die IMIanzenl.'lusc .Vphiden, p. i, 1S54. 



5. Kal>. Lali. Zool. Kab. Imp., \arch. t^'niv., 1S04 (K. Fauna anil Anat. Sem 

 Aphid, p. S4)' 



6. C.li Afidi, p. jK, 1K60. 



i 



