80 KA.NSAS UNIVERSITY SCIENCE BULLETIN. 



indrical, and 0.72 mm. long, or about ten times the length of the 

 tarsi. Style hirsute, concolorous with the abdomen, 0.45 mm. 

 long, or a little more than half the length of the honey-tubes. 

 Total length of the body, 2.75 mm. 



This form was taken from the cultivated rose, May 21. It is 

 gregarious, and colonizes the terminal buds, leaves, and stems. 

 This form may perhaps be called a variety of this species, 

 since it does not correspond in every particular with the species 

 named, yet the specimens taken, which were evidently of the 

 same parentage, differed variously in color and size. 



Macrosiphum. Plate XVIII, fig. 89. 



Head dark green. Antennae dark, except the first and second 

 joints and the base of the third joint ; length of segments : I, 

 0.14mm.; 11,0.07 mm.; Ill, 0.84 mm.; IV, 0.72 mm., V, 

 0.66 mm.; VI, 0.18 mm.; VII, 0.66 mm.; total length, 3.80 

 mm., being the length of the seventh joint longer than the ab- 

 domen. Sensoria circular and unequal in size, fourteen to 

 twenty on the third joint, none on the fourth, the usual distal 

 one on the fifth, six small and one large one at the distal end 

 of the sixth. Eyes dark red ; ocelli bordered with black ; ocu- 

 lar tubercles prominent. Beak light in color except the two 

 distal segments, which are dark; length, 0.63 mm., extending 

 to the mesocoxse. 



Thorax all dark green. Wings hyaline, veins dark. Stigma 

 dark gray, 0.18 mm. broad and 0.90 mm. long. Total wing ex- 

 pansion, 5.60 mm. Tarsi and distal ends of the tibia and fem- 

 ora dark, remainder brownish yellow. All slightly hirsute. 



Abdomen green. Honey-tubes dark, imbricated, cylindrical, 

 and 0.79 mm. long, being four times the length of the tarsum. 

 The style is hirsute and armed with short spines. It is long and 

 slender, tapering gradually to a slender point; length, 0.36 

 mm., being about one-half the length of the honey-tubes. To- 

 tal length of the body, 2.70 mm. 



This form was taken May 17, on wild lettuce {Laduca scari- 

 ola) . It is gregarious and colonizes the terminal stems. 



Macrosiphum sp.? Plate XXI, fig. 98. 



Head dark green. Antenna* black, except the first and sec- 

 ond joints and the third, which are brownish ; all slightly hirsute ; 

 length of segments : I, 0.14mm.; II, 0.07 mm.; Ill, 0,73 mm.; 



