Pomona College Journal ok Es'ToMoLociv 



593 



mm.; V, 0.67 mm.; VI, 1.0 mm. (.spur 0.76 mm.) ; tot.'il ;t.;<.s imii. Tlu-rc an- from 

 fourtfen to rtftccn large circular .scnsoria in a row on articlr III /iiul u.siial iiuml)rr 

 on V and VI. Rostrum — Rcaclu-s ni'arly to the sicond coxu-, dark at tip only; 

 remainder, color of tiody. I'rolhorax — Mucli wider than long, light green in color, 

 without lateral tuhercles. Mrso- and Metathiirnx — Dorsum light green with the 

 miisch- lohes pinkish or amber, ventral side darker on middli-. .//x/o/hcii -Long 

 and regul;irly rounded, light shiny green with a darker >;reen h>ngitudinai Iwind 



Figure 193. Macrosiphum citrifolii 

 on the middle of the dorsum, all green venlrally, may, or ni.iy nol, have red spi)ls 

 on dorsum. Cornicles — (Figure 1J)1 g). Cylindrical, long, restricted before apex, 

 with mosaic markings in the restricted area, nearly twice as long as style, color of 

 body with the ,'ipical two-thirds dusky, h-ngth 0.7 mm. /-eg*- Long and slender, 

 normally haired, coxif color of body, femora green with apical half dusky, tibiie 

 dusky throughout, tarsi dark. If'ini;s — Hyaline. Primary — Length l-.rf nun., 

 width \.i:> nun.: veins ending in dusky spot at wing margin: costal well defined, 

 but narrow, light vellowish >rri-en : suln-ostal wide, light yellowism green; 



