254 THK CAXADIAX KXTllSmLCMMHT. 



3. Nccianes very long and lareie .'.... 5. 



Nectaries very short and more or less ronstriricd nt the middle. . .6. 

 Nectaries little more than pores 10. 



4. Nectaries distinct, usually being longer than broad at middle 7. 



Nectaries little more than pores and broader than long 10. 



5. Nectaries as long as one fourth the body or more, and swollen in the 



middle Drepmioiiphum. 



Nectaries large and nearly one-fourth the length of the body, swollen 



at liie base and tapering toward the middle Drepanaphis. 



6 Spur of sixth antennal segment longer than the segment. .. Gi/(t//*///J. 

 Spur of sixth segment not longer than segment Euceraphii. 



7. Antennst' longer than the body, spur of sixth segment long and about 



the same length as the segment ... 8. 



Antenna- shorter than the body, spur very short, often being little 

 more than a nail like process, segment short 9. 



8. Antenna' with spur at least as* long as sixth segment, and with little 



or no antennal tubercles. Nectaries twice as long as broad and 



constricted in the middle Myzocallis. 



Antennai with spur shorter than sixth segment, nectaries much 

 broadened at base EucciUipterui. 



9. Antennal spur less than one half the length of the sixth segment, 



nectaries not longer than broad at base, and constricted in the 

 middle Chromap/iis. 



Antennal spur at least half as long as the sixth segment, nectaries short, 



about as long as broad and placed on a broad base. . . Callipierns. 



10. Antenna; situated on distinct tubercles and much longer than the 



body, nectaries but pores with raised edges, spur of sixth long and 



tapering ^foiiaphii. 



Antennce not on tubercles and scarcely longer than the body, nectaries 

 reduced to pores, spur of sixth joint nearly as long as the 

 joint \foneUia. 



Drepunoiiphum Koch, 1855.* 



type, A. platanoides .Schrank. 



Characters : Antennas exceedingly long and placed on distinct 



tubercles, spur of sixth segment about six times as long as the segment, 



which is very short ; third segment longer than the sixth and spur 



together. First segment large and gibbous on the inner side ; antennal 



•Die Pflanzrnl.'lusc Aphiilcn, p. joi. 



