46 Thomas Albert Williams 



Cotvpes in the collection of the University of Nebraska (no. 



70) and of the U. S. National Museum (no. 87). 



56. Aphis lugentis n. sp. 



Apterous viviparous female: Dark green. Legs and antennae black, the 

 latter half the body in length. Abdomen with very distinct margins upon 

 which is a row of impressed dots. Honey tubes black, nearly twice the 

 tarsi. Tail black, half the honey tubes. 



Pupa: Lighter colored, with dusky black head, antennae, legs, honey 

 tubes, wing-pads and tail ; the latter conical, short and broad. 



Winged viviparous female: Antennae black, hardly half the body in 

 length; III longer than VII, but shorter than VI and VII together; VII 

 very slender. Eyes dark red. Head dusky black. Neck green. Protho- 

 rax darker, with small, slender, lateral tubercles. Thorax black. Legs all 

 black but the immediate bases of femora. Wing insertions yellowish. 

 Wings hyaline, with slender brownish veins ; cubitus with second branch 

 but very little nearer to the apex of the wing than to the first branch. 

 Stigma smoky black, rather short, acute at outer end. Abdomen green, 

 with four large black spots on each lateral margin, a row of impressed 

 dots just within these, a few irregularly placed brown spots over the dorsal 

 surface, a transverse band of brown between the honey tubes and one on 

 each segment from there to the tip. Honey tubes not quite twice the tarsi 

 in length, black. Tail black, hairy, about half as long as the honey tubes. 

 Length of body 2.30 to 2.85 mm., to tip of wings 3.95 to 4.15 mm. 



This very large aphis is found on the stern, leaves and flower 

 stalks of Senecio lugens. War Bonnet Canyon, June 23, 1890. 

 Cotvpes in the collection of the University of Nebraska (no. 



71) and of the U. S. National Museum (no. 91). 



57. Aphis lutescens Monell. 



Monell, Bull. U. S. Geol. Sur. Ter., V, 1, p. 23 (1879). 

 Thomas, Ins. 111., 8th Rep., p. 191 (1879). 



Apterous viviparous female: General color bright lemon yellow. Out- 

 line broadly ovate. Head dusky. Eyes very dark red or black. Antennae 

 hardly half the body in length, dusky, with black tips. Beak reaching 

 beyond middle coxae. Legs dusky to black, generally with bases of femora 

 and a portion of tibiae yellowish. Honey tubes tapering from a broad 

 base, reaching to tip of abdomen, blackish. Tail short, club-shaped, obtuse, 

 hairy, blackish. Anal plates blackish. 



Pupa: Very similar but with shorter honey tubes, conical tail and size 

 rather smaller. Wing-pads dusky. 



Winged viviparous female: General color bright lemon yellow. An- 

 tennae somewhat pilose, a little shorter than body, the length of joints 



130 



