52 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Protliorax dark yellow ; lateral tubercles present but not very 

 prominent. Thorax dark yellow ; wings pellucid, veins dark 

 brown bordered with a faint smokiness. Stigma dark, 0.07 mm. 

 in breadth and 0.12 mm. long. Total wing expansion, 5.80 mm. 

 Tarsi and distal end of the tibia black, remainder brownish 

 yellow. All slightly hirsute and normal in length. 



Abdomen brown, with a marginal row of three or four black 

 spots, one at the base of each honey-tube, and some transverse 

 markings along the median line, as shown in the illustration. 

 Honey-tubes imbricated, cylindrical, and black, except a small 

 seinicircular patch at the cephalic part of the base which is of 

 a light yellow. Length, 0.19 mm., or about twice as long as the 

 tarsi. Style hirsute and imbricated. It has a black distal half, 

 the color extending along the margin to its base ; the remainder 

 is light yellow in color. It is 0.10 mm. long, or about one-half 

 the length of the honey-tubes. Total length of the body, 

 2.00 mm. 



This form was taken November 1, on the milkweed {Asclepias 



) and oleander {Nerium oleander). It is gregarious and 



colonizes the ventral side of the leaves. Fitch has named this 

 louse asclepiadis, but it is doubtless the same form which Fonsle- 

 comb named neru. (Thomas, Rept. Ent. 111., 8 : 95, 1880.) For 

 a variation in form, see plate IX, figure 72. 



Aphis sambucifolia Fitch. Plate XIX, fig. 91. 



Head black. AntenniP brownish black and hirsute ; length 

 of segments : I, 0.09 mm. ; II, 0.09 mm. ; III, 0.34 mm. ; IV, 

 0.23 mm. ; V, 0.23 mm. ; VI, 0.12 mm. ; VII, 0.39 mm. ; to- 

 tal length, 1.50 mm., extending to the abdomen. Sensoria cir- 

 cular and numerous ; about twenty-six on the third segment, 

 twelve on the fourth, six on the fifth, and a cluster of very 

 small ones mounted with short hairs at the distal end of the 

 sixth. Eyes black with a slight tinge of red ; ocular tubercles 

 prominent; ocelli normal. Beak blackish at the distal end, 

 0.9 mm. long, extending to the mesocoxge. 



Prothorax is black and short, having two pairs of lateral 

 tubercles, the caudal pair not conspicuous ; the cei)halic pair 

 broader than long. Thorax is black and arched. Wings pel- 

 lucid with a brownish cast ; veins dark brown with narrow 

 smoky borders. Stigma, 0.72 mm. long and 0.09 mm. wide. 



