550 Pomona College Journal of Entomology 



curving slightly inwardly, bases far apart; first branch of the third discoidal 



arising one-third the distance from the base, second branch arising three-fourths 



distance from base of first branch to apex of second branch ; all veins except 



subcostal dark brown. Secondary — Length 2 mm., width 0.55 mm., veins normal. 



Style — (Figure 182 d). Ensiform, somewhat sickle-shaped, light green, length 



0.37 mm. 



APTEROUS VIVIPAROUS FEMALE (Figure 182 B) 



Length not including style 2.6 mm., width of mesothorax 0.51 mm., greatest 

 width of abdomen 0.95 mm., very long and slender body, ofttimes the abdomen is 

 no wider than the head and thorax. 



Prevailing color — Green with yellowish-green head and two such colored 

 longitudinal stripes extending from head to tip of abdomen. Head — Very little 

 narrower than thorax, lighter than rest of body. Thorax — Quite long and slender, 

 general color of the body. Eyes — Red. Antennae — (Figure 182 h). Very long 

 reaching far bej'ond tip of style, articles I and II yellowish, color of head; III and 

 IV amber witli dusky tips, V amber with base and apical three-fifths dusky, VI 

 dusky throughout, lengths of articles: I, 0.19 mm.; II, 0.09 mm.; Ill, 0.8 mm.; 

 IV, 0.65 mm.; V, 0.69 mm.; VI, 1.33 mm. (spur 1.1 mm.); total 3.75 mm. 

 Rostrum — Reaching to third coxae, light green with dark tip. Corniches — (Figure 

 182 e and f). Long, cylindrical, curved slightly outwardly, wider at base and 

 mouth, restricted just before mouth, apex dusky and marked, length 1.1 mm., 

 width 0.05 mm. Legs — As in winged form. Style — Ensiform, green, length 0.5 



mm. 



Young — Very long and slender with abdomen no wider than head and thorax, 



green. 



Host — Large colonies infesting the tender shoots of the Narrow-leaved Willow 

 Salix laevigata Bebb. Apterous forms present in considerable numbers on a few 

 trees in different localities, but winged forms scarce. 



Locality — Along the streams near Santa Paula, Cal., and along the Sespe 

 Creek. Date of collecting — April 26, 1911- Serial number 30. 

 Macrosiphum rosae (Linn.) Schouteden 

 ROSE APHID 

 IMPORTANT SYNONOMY AND LITERATURE 



1735 Aphis rosae Linn., Syst. Nat., II, 734. 



1737 Aphis rosae Reaum., Mem., V, III, 21. 



1761 Aphis rosae L. Sulz., Ins. Tab., 12. 



1773 Aphis rosae Linn., DeGeer, Ins. Ill, 65. 



1794 Aphis rosae Linn., Fabr., Ent. Syst., 216. 



1801 Aphis dipsaci Schrk., Fr. Boica, II, 104. 



1804 Aphis rosae Linn., Schrk., Fr. Boica, II, 117. 



1822 Aphis rosae Linn., Fabr., Syst. Rhyng., 298. 



1843 Aphis rosae Linn., Kalt., Mon., Pflz., 3-4. 



1855 Siphonophora rosae Linn-Koch, Pflz., 178-9. 



1876 Siphonophora rosae Reaumer-Buck, Mon. Brt. Aph., I, 103-9. 



1880 Siphonophora rosae Reaumer-Thos. 8th Rept. Ent. 111., p. 50-1. 



1887 Siphonophora rosae (Linn)-Oestl., Aph. Minn., p. 81. 



1905 Macrosiphum rosae (Linn) Schout. Aph. Belg., p. 240. 



1910 Macrosiphum rosae (Linn)-Fullaway, Ann. Rept. Haw. Exp. Sta., 25. 



