62 XTLINA RHIZOLITHA. 



thorax rounded, the wing-covers long, the tip of the 

 abdomen rather bluntly rounded off, having at the 

 end a small rough knob furnished with two small 

 spikes curving a little outwards towards their ex- 

 tremities ; it is of a mahogany-brown colour and very 

 glossy. (W. B., 30th September, 1875; E.M.M., 

 November, 1875, XII, 140.) 



Xylina semibrunnea. 

 Plate XCVI, fig. 4. 



On the 3rd of May, 1870, Mrs. Hutchinson kindly 

 sent me sixteen eggs laid by a female moth on ash- 

 twigs. 



The egg is hemispherical, flattened beneath, rounded 

 above, most minutely ribbed and reticulated, and of a 

 cream colour. By the 12th of the month this colour 

 began to change to grey. On the 17th a further 

 supply of eggs was sent me by this lady ; they began 

 to hatch on the 24th, and in the course of a few more 

 days most of the young larvae were out of the shells 

 and feeding on the young ash-leaves, soon becoming 

 a quarter of an inch long, at which time they were of 

 a pale yellowish watery green, very pellucid, but with 

 a faint opaque yellowish -white dorsal line just visible; 

 after moulting the subdorsal began in a few days to 

 appear as a fine line, and by the 5th of June these 

 lines had become more distinct. By the 12th the 

 larvae were five-eighths of an inch in length, and the 

 tubercular dots were then distinct. A few days more 

 and the most forward individual was an inch long. 

 Their progress was very satisfactory, for by the 

 20th of June they had all attained their full growth, 

 and by the 28th had retired to earth. The moths 

 appeared from the 21st to the 27th of the September 

 following. 



The full-grown larva measured an inch and a quarter 

 to an inch and three-eighths in length, and was cylin- 



