Pomona College Journal of Entomology 



795 



usually nine or eleven, IV lias none; V has one near the apex, and three or 

 four on VI at the base of the spur. Rostrum — Yellow with dark tii), floc- 

 culent, reachinfi to the third eoxie. l'rothora.c — Little wider than the head, 

 with small lateral tubercles, dark olive green with lighter green transverse 

 bands at base and apex, ventral surfaee dusky green, Hoeeulent. M( xd- and 

 Metathorax — Dark olive green with black muscle lobes, ventral surface dusky 

 green, flocculent. Abdomen — Well rounded, lateral edges lobed, with small 

 tubercles, dull olive green with dark longitudinal dorsal and lateral bands 

 with few dark cross bands. These markings arc vcrv iri-egular and often 



Figure 252. Rhopalosiphum nymphaeae (Linn.) 

 A, winged viviparous female; B, apterous viviparous female; 1 and 2, antenna 

 of winged viviparous female; 3, dorsal aspect of style of winged female: 4, 

 cornicle of winged female: 5, lateral aspect of the style of winged female: 6. 

 cornicle of apterous female; 7, style of apterous female; 8 and 9, antenna of 

 apterous female. 



obscure ; ventral surface dull green, smooth. Anal plate well rounded, rough, 

 hairy and nearly black. Cornicles — (Figure 252, 4). Long, clavieal, extreme 

 base wide, basal half very narrow and widening throughout the apical half, 

 slightly constricted just before the flaring mouth, the swollen portion much 

 darker than the remainder which is rather dark olive green. They do not 

 reach to the tip of the style, length 0.25 mm., greatest width O.Oi mm. Legs 

 — Very small, dark, with very fine and short hairs. Coxaj dark; femora dull 

 green with apical two-thirds nearly black; tibia? dull green with base and tip 

 very dark; tarsi dark. All joints pruinose or flocculent on the under sides. 

 Wings — Normal, hyaline. I'rimanj — Length 2.2 mm., width 0.8 mm., rather 

 slender; costal wide, brown; subcostal much wider than the costal, brown: 



