SANBORN: KANSAS APHIDID.E. 71 



three segments, a transverse black bar between the style and 

 the honey-tubes ; also a confluent patch is cephalad the latter. 

 Honey-tubes are incrassate and black, 0.41 mm. long, or three 

 times the length of the tarsum. The style is black, 0.19 mm. 

 long, hirsute, and gradually tapers to a point. It is about 

 equal to the tarsus in length. Total length of the body, 2.04 mm. 

 This form was taken on the sweet alyssum [Alyssum mara- 

 tivi urn ) , Asparagus piumosa, willow ( Salix sp. ) , and gladiolus. It 

 is gregarious in habit and colonizes the leaves. 



Macrosiphum, n. sp. Plate XV, fig. 79. 



Head black. Antenna^ hirsute, bristly in nature, and of a 

 capitate character. All segments of a mottled black except the 

 base of the third, which is light in color. Length of segments : 

 I, 0.14mm. ; II, 0.07mm. ; III, 0.63mm. ; IV, 0.59mm. ; V,0.57 

 mm. ; VI, 0.13 mm. ; VII, 0.99 mm. ; total length of antennoe, 

 3.00 mm. , or twice the length of the body. Sensoria circular, few, 

 and small, being about eight in a row on the third segment, 

 none on the fourth, the usual one near the distal end of the 

 fifth, and a large one with five small ones at the distal end of 

 the sixth. Eyes red ; ocular tubercles prominent ; ocelli 

 present but not prominent. Beak dark, hirsute distal segment 

 black. Total length, 0.54 mm., extending to the abdomen. 



Prothorax brown ; thorax black. Wings of a brownish tinge. 

 First discoidal with a very heavy border of dark brown ; second 

 discoidal marked with a little less of the same ; third discoidal 

 and stigma not bordered, but brown in color. Stigma, 0.63 

 mm. long by 0.0 mm. broad. The caudal boundary of the 

 stigma is darker than the cephalic boundary. Total wing ex- 

 pansion, 4.94 mm. Legs hirsute, the hairs are short, stiff, and 

 bristly in nature. Tarsi, distal ends of femora and each end 

 of tibia black. Legs all slender in proportion to the body. 



Abdomen dark, with scattering, short, somewhat capitate 

 hairs. Honey-tubes imbricated, black, cylindrical, and 0.41 

 mm. long, being about four times the length of the tarsi. At 

 the base cephalad the honey-tubes is a light-colored crescent. 

 This as well as each honey-tube is situated on a tubercular 

 prominence of the abdomen. Style ensiform, lighter in color 

 than the abdomen, dirty gray. At the distal end is one long, 

 capitate hair ; other hairs are present, distributed toward the 



