TYOHEA ERAGROSTIDIS. 89 



The tarsi have two claws, but very commonly they 

 are, like the preceding, so folded as to appear but 

 one. 



Taken in ant-hills at Beckenham. 



The plate shows an insect just before moulting, 

 when the old skin has separated from the new, yet it 

 still envelops the insect itself. 



The fundatrix attended by a few young may be 

 taken as early as February. 



Tychea erageostidis. Plate CXXYIII, figs. 5, 6. 



Viviparous female. 



Inch. Millimetres. 



Size of body 0*050 X 0*040 1*26 X 1*01 



Length of antennse 0*040 1*01 



Ovoid or nearly circular, glabrous, whitish. Head 

 broad, vertex flat and smooth. Antennal joints five, 

 and almost equal. The fourth as small as the first, 

 the fifth the longest, and furnished with a nail. Eyes 

 and nectaries none. Abdomen domed and ringed. 

 Legs stout and moderately long, claws double, but 

 often folded together. Cauda obtuse. Rostrum about 

 two -thirds the length of the body, but in the young it 

 projects beyond the tail. 



The queen Aphis or fundatrix is quite different in 

 form, being shuttle-shaped. The antennas, rostrum, 

 and legs are much less developed. Isolated points of 

 red pigment mark the seat of the foetal eyes, which 

 are only partially developed. 



Taken in ant-hills at Beckenham, and also at the 

 Cheviot, on the roots of Poa annua. 



This insect feeds also on Panicum glaucum ; and 

 apparently also is viviparous, on the lower exposed 

 leaves of sweet vernal grass, Antlioxanthum odoratum. 



