(11) 



eral color bright lemon yellow ; thorax yellow, except the lobes, which 

 are brown or blackish ; eyes black ; antennae pale or dusky ; abdomen 

 yellow ; honey-tubes yellow or ochreous ; tail yellowish ; legs pale. 



In some specimens the thorax is dark ; the abdomen greenish- 

 yellow. 



Antennae seven-jointed, nearly as long as the body. In some speci- 

 mens (probably males) they appear to be on tubercles, which are pro- 

 longed on the interior margin ; seventh joint about as long as the 

 fifth and sixth united. Honey-tubes slender, cylindrical, and reaching 

 about to the tip of the abdomen. Tail short and blunt. In some 

 (^wingless) specimens there is a distinct tubercle on each side of the 

 prothorax, and another on each side just above the posterior coxae, 

 but these were not observed on the winged individuals. 



Wingless individuals. — Color almost uniform greenish-yellow ; eyes 

 black ; honey-tubes yellowish ; tail whitish ; legs pale. 



Found in June, at Carbondale, Illinois, on the under side of the 

 leaves and stems of Vernonia fasciculata ; also about the first of Sep- 

 tember, at Ft. Dodge, Iowa, on the flower stalks of the same plant. 

 The latter presented some slight differences from the former. Is 

 closely allied to A. beccahungae, Koch, and possibly identical with it. 



30. Aphis mali. Fabr., Syst. Ent., 737. 



Aphis pyri, Reaum., Ins., Ill, 281,350. 



On the leaves and tender twigs of the Apple. 



31. Aphis malifoliae, Fitch, Fourth Rep. N. Y. S. Cab., 40. 



Probably a variety of the preceding. On apple leaves. 



32. Aphis cephalanthi, new sp. 



Wingless female. — Of a nearly uniform purplish color, the young 

 quite pale, the older and mature individuals darker, but more or less 

 translucent, with a slightly pruinose cast or covering ; head and tip 

 of the abdomen dusky ; a slightly impressed line along each side 

 of the abdomen near the margin. Honey-tubes cylindrical, reaching 

 about to the tip of the abdomen ; tail distinct. Beak reaches rather 

 beyond the middle coxae. Length about .05 inch. 



They give a reddish or dull orange color when crushed. 



Winged individual. — Head and thorax black, abdomen pale purplish, 

 marked along the margin with pruinose spots. Two pruinose spots 

 on the abdomen immediately behind the thorax ; tip of the abdomen 

 dusky ; about four of the pruinose spots on each side anterior to 

 the honey-tubes and two behind them. Antennae very slender, 

 dusky, reaching about to the middle of the abdomen. 1 egs pale, 

 except the joints and tarsi, which are dusky. Wings transparent, but 

 with a slightly smoky shade when seen erect in the living insect ; veins 

 dark, except the subcostal or midrib, which is pale. 



