SUBFAMILY APHINAE 323 
Apterous Vivipara. ‘Light green’; appendages pale except as follows: Antenna begin- 
ning with tip of III, tarsi, tips of tibiae and of cornicle, rostral III, and IV-+V dusky. Body 
length 2.80-3,50; .53 across eyes; antenna 5-5.20; hind tibia 3.4; rostrum attaining between 
2d and 3d coxae. Hairs on vertex and body slightly capitate to blunt or apparently pointed; 
on antennal III and hind tibia blunt to pointed, about same length as diameter of segment 
bearing them. Cauda slightly tapering to cylindrical (distorted on cotype slide). 
Alate Vivipara. Color and measurements same as in aptera described above. 
Collections. On Rudbeckia laciniata and R. montana. New Mexico: Beulah. 
Apterous and alate viviparae July 26; rare. 
Cotypes. U.S.N.M. 
| TohT2 .20 : 
AIG—-1.2 Sen, 2-3 
Apt. peed ee ic 
. i eaeae | ISO - Na Oe f 
(py . 50- 1,60 
pried ace S99 te: WRES. et ORE LE 
ne nlaPe SF 2370+ 
Alate ; 
RO ae ent 
00 
Fig. 386. Macrosiphum rudbeckiarum 
Chief Distinguishing Characters. Light green body, length of the reticulated 
portion of the cornicle (not equalling more than fifth nor less than seventh of 
the entire length of cornicle), number of sensoria on III (not exceeding 10) in 
alate or apterous viviparae, length of rostral IV+V (.14-.16, considerably 
shorter than base of VI and not longer than hind tarsal II), length of cauda 
(about .50), number of hairs on cauda (5-7 on each side) and length of antenna 
(not shorter than 5). Data for description and figure obtained from original 
description and cotypes. 
Macrosiphum sanborni Gillette 
The Chrysanthemum Aphid 
Macrosiphum chrysanthemi (Oestlund) (misidentification), Sanborn, 1904:73. 
Siphonophora chrysanthemicolens Williams, 1891:8 (nomen nudum). 
Eby iment sanborni Gillette, 1908b:65; Davis, 1911b:28; Gillette and Palmer, 1934: 
19 
M acrosiphoniella sanborni, Theobald, 1926:149. 
Apterous Summer Vivipara. Amber-brown to black posteriorly; shining; cauda, anal 
plate, rostrum, tarsi and cornicle black; antenna except III dusky to blackish; tibiae yellow 
except knees and tips which are blackish. Body length 1.6-2; across eyes .35-.40; hind tibia 
1-1.24; antenna 1.7-2.2; rostrum attaining nearly to 3d coxa. Hairs pointed; on hind tibia 
.06-.07; on side of abdomen .06-.09. Cornicle enlarged at base to over twice diameter of distal 
portion, with reticulation extending over more than half of the length of cornicle. Cauda 
spatulate, bearing 4-7 hairs on each side and a single preapical dorsal one. 
Alate Vivipara. Same as apterous vivipara except as follows: Hairs on side of abdomen 
Tren wear vison 
(50-56) 
(50-55) 
Had, 
STs 
Ta, ~ 14) Sy cate 
Fig. 387. Macrosiphum ae! 
Collections. On leaves and tender stems of chrysanthemums both in green- 
houses and outdoors. Colorado: Grand Junction, Boulder, and Fort Collins. 
Alate and apterous viviparae all months of the year in greenhouses; rather com- 
mon, often injurious. 
