MYZUS BIBIS. 
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bristles, as also are tbe sides. Antenna long and 
very fine. Cornicles cylindrical, pale green. Eyes 
bright red. Cauda obtuse. Legs yellow or greenish. 
Under a high magnifying power these bristles are 
capitate, a fact not in accordance with the experience 
of Passerini, as regards the Italian species. 
Pupa, 
Large, shining yellow, or green. Two brown spots 
on the occiput. Abdomen convex and glistering. 
Winged viviparous female. 
Indies. Millimetres. 
Expanse of wings 0*300 7*62. 
Size of body 0*100x0*045 2*54x1*13. 
Length of antennae 0*090 2*27. 
,, cornicles 0*020 0*50. 
Bright greenish-yellow. Head pale olive. Eyes 
red. Three ocelli obvious. Antennae fixed on small 
tubercles. Prothorax with an indented olive band. 
Thoracic lobes brown. A stellate spot is seen on the 
post-thorax, succeeded by six or seven irregular trans- 
verse bands on the abdomen of varying thickness ; 
four or five spots on each lateral edge. Cornicles 
green or olive, cylindrical, or at least very slightly 
clavate. Legs green, with olive femoral points and 
tarsi. Wings broad, with yellow insertions, greenish 
cubitus and veins. Stigma grey. 
Plentiful from May to July on the red-currant bush, 
Pihes ruhrum, and also on the gooseberry, Bihes grossu- 
laria. The continual punctures from the rostra cause 
large red or brown blisters on the leaves of the former 
plant, within which the Aphides swarm. The larva is 
very transparent, and is well suited for examination of 
the internal anatomy. 
Although no dorsal vessel has yet been certainly made 
out which has the function of a heart in these minute 
insects, a continual rhythmical action of the internal 
