LIFE-HISTOKIES 01? GAMASIN^. 305 



it subsequently became adult, but I am not certain of the day of 

 the change. 



I had other eggs which were laid by the same pair of Ga- 

 masids, and which I bred through all the changes with a merely 

 confirmatory result. 



There were, however, two or three of the nymphs, originally 

 captured on the beetle, which, although they attained the mature 

 nymphal stage, never seemed to get any further. I kept them 

 alive for about three months ; they then died without becoming 

 adult. 



In all stages the specimens captured on the beetle were pre- 

 cisely like those captured in the open. 



A microscopical examination of the cast nymphal skins of this 

 species shows that the dorsal plates are composed of cells, the 

 form and arrangement of which is delineated in Plate XXIII, 

 fig. 8, and which exhibit but little granulation. It will be seen 

 that the cellulation is very different from that of cr assises shown 

 in Plate XXIII. fig. 7; but the cellulation of the ventral plates in 

 the coleoptratorum nymph is very similar to that of the dorsal 

 surface of crassipes. 



Observations on G-amasus crassipes. 



On the 14th April, 1880, two females and one male o£ this 

 species were put in a cell by themselves. 



On the 21st I noticed eggs in the cell ; one of the females 

 seemed to keep possession of a sort of retreat in the moss which 

 had several eggs attached to it. 



The egg is an oval with very blunt rounded ends, the surface 

 slightly roughened by irregular depressed lines ; it is white, very 

 opaque, and always attached by a few threads to the substance it 

 is deposited on. 



The major axis is about *4 millim. 

 The width at the larger end about *28 millim, 

 „ „ smaller „ *24 millim. 



On the 23rd the first hexapod larva emerged. I put it in a cell 

 by itself with one of the eggs. This larva is drawn in Plate XXII. 

 fig. 3. Like all larvee of Gramasinse, it is white and semitrans- 

 parent. 



On the 26th the larva changed to the nymphal state. 



