(4) 



Tribe 1. APHIDINI. 



Genus SiPHONOPHORA, Koch. 

 Antennae very long, on tubercles ; honey tubes long, cylindrical. 



Siphonophora acerifoliae, new sp. 



Winged, viviparous female. Gleneral color light grey, varied with 

 white add ash-brown. Antennae extending beyond the tip of the 

 abdomen, nearly to the tips of the wings. The three ocelli distinct. 

 Prothorax with depressed, expanded lateral margins. From the back 

 of each of the first three or four abdominal segments, arise two distinct, 

 slender, somewhat curved spines. Honey-tubes not extending beyond 

 the tip of the abdomen. Most of the veins of the front wings, es- 

 pecially the fourth and the forks of the third, expand at the tips, forming 

 dusky spaces ; the subcostal vein is strictly parallel with the costa ; 

 stigma short and rather small. 



Basal joints of the antennae dull yellowish, with a narrow darker ring 

 at the apex of the third and fourth joints; more or less of the fifth of a 

 transparent whitish color, forming an annulus ; sixth and seventh 

 dusky. 



Plead pale brownish, with a narrow white median line ; eyes red ; 

 prothorax same color as the head, with more or less distinct, very nar- 

 row, abbreviated, longitudinal white lines ; abdomen marked with a 

 few white dots somewhat regularly arranged, powdered with white 

 behind the honey-tubes. The white lines and spots appear to be 

 formed by a very fine white powdery substance. The spines 

 on the abdomen black. Honey-tubes brown, white at the immediate 

 tips. 



Apterous individuals, (probably not fully grown.) Pale pea-green ; 

 eyes dark ; apical portion of the antennae dusky : tibiae dusky at the 

 base ; hoaey-tubes pale green. The surface of the body smooth and 

 shining. 



Found on leaves of Acer dasycarpum, chiefly on the under 

 side, somewhat sporadic and not aggregated in large colonies. Winged 

 specimens very active and apparently capable of leaping. Slightly 

 above medium size, but less than IS. rudbickiae. 



It is possible that this Aphis should be placed in Drepanosip)hu'm, or 

 a new genus be formed for its reception. 



Siphonophora rudbeckiae, Fitch. Seuate 30, G6, 1851. 



On RudhecMa lariniata, Ambrosia trifida, and Solidago serotina. 



Siphonophora ambrosiae, new sp. 



Similar in size and appearance to >S'. rudheckiae, but varying in color 

 from a light brown to a dark seal brown. 



Winged individuals. Discoidal veins of the front wings strongly 

 curved. Antennae passing the tip of the abdomen, light brown, dark 

 at the apex. Honey-tubes long, cylindrical, reaching bej'ond the tip 



