88 BRITISH APHIDES. 



of these yet unborn insects are quite as much developed 

 as those of their mothers. It is to be noted also that 

 in these insects the antenna? are disengaged or freed 

 from the body before the other limbs (fig. 8). 



Taken by Sir John Lubbock in ant-hills near Beck- 

 enham, in April. 



I kept several individuals alive in moist earth, together 

 with three or four specimens of Formica fla va t for six 

 weeks, without noticing any tendency to become pupae 

 or to greatly vary in their general appearance. These 

 insects partially change their colour and become darker 

 by exposure to light. 



In Italy the insects nestle at the roots of Oryza mon- 

 tana. 



Tychea setari^;, Pass. Plate CXXVIII, figs. 1 — 4. 

 Viviparous female. 



Inch. Millimetres. 



Size of body 0-060x0-045 1-52x1*18 



Length of antennas 0*030 076 



Fundatrix short, oval, flat. Colour and texture like 

 white kid leather, some with a faint tinge of green. 

 Antennae very short, about one fourth the length 

 of the body, 4-jointed, with a rounded wart. The 

 third joint much the longest, and often showing a 

 tendency to a constriction in the middle. Eyes very 

 minute. Dorsum has ten or more dusky transverse 

 bands, each terminating with a pore. Antennae, legs, 

 and tail dusky brown. Rostrum short, reaching to 

 the third coxae. Legs hardly project beyond the disc 

 of the body. Cauda conical, sometimes with two or 

 more crescentic marks above it. 



After several moults the legs and antennae become 

 much longer, the insect becomes rounder, and at the 

 last moult an additional joint may be counted to the 

 antennae. In all stages the body is finely pilose. 



