'S:'.] 245 



Their movements were very sluggish, and after eating a con- 

 siderable quantity of food, they very slowly began one after another 

 to enclose themselves within two, or sometimes three leaves of the 

 grass, joined together longitudinally by lacing or spinning, with white 

 silk, the edges more or less close to each other, and became completely 

 hidden ; the earliest spun itself up on the 18th of the month, another 

 on the 20th, and the others during the next three days. 



The perfect insects, full-sized specimens, were bred on the IStb 

 and 16th of July following. 



The full-grown larva is 10 lines in length, its general figure of 

 moderate substance, is stoutest in the middle of the body, and tapers 

 a little from the thoracic segments towards the head, whicb is globular 

 and projecting, larger than the second segment whicli is i-emarkably 

 small and short ; it tapers also gradually on the last four or five segments 

 when seen from above, and when viewed sideways the back then appears 

 to be slightly arched and sloping gradually to the anal flap, and this is 

 a trifle flattened and rounded off behind ; the belly is flat and the legs 

 are all well beneatb it and rather short ; the segmental divisions are 

 very delicately defined, also most particularly the sub-dividing trans- 

 verse wrinkles, which by no means arrest attention unless diligently 

 sought for : in colour the head is of a rather deeper green than that of 

 the body, and rough with minute points, the upper lip of a pinkish hue 

 is smoother and deeply channelled, the ocelli black ; the body above is 

 of a tender and delicate light green ground-colour, without any gloss, 

 and on the thoracic segments the skin is besprinkled with black points 

 of extreme fineness, so that they do not affect the delicate colouring 

 of the green ground ; the dorsal stripe is the darkest marking of green, 

 and is very narrow on the second segment, and from thence uniformly 

 wider until near the end where it becomes very gradually attenuated 

 on the anal flap ; this dorsal stripe is of a darker, rather bluish-green, 

 having a stoutish line of paler green running through the middle, and 

 bordered outside in stronger contrast by a stout line of still paler green 

 than the ground ; the sub-dorsal line is of the same pale green but 

 thinner ; below, at a little distance, the trachea shows partly through 

 the skin and on it can be discerned the rather prominent reddish 

 flesh-coloured spiracles ; below these again, at a little distance, follows 

 an inflated paler stripe of almost creamy-whitish, extending round the 

 anal flap, which often hides the belly and legs from view when the 

 larva is in repose, but at other times, when examined beneath, these 

 are seen to be wholly green, excepting a transverse patch of white on 

 front of the ventral surface of the eleventh and twelfth segments. 



