Trymalium 



( 409 ) 



Tryphaena 



Trui'ili's is rather precarious, and attempts to infect 

 the soil by watering with washings from sliced 

 Truffles have so far proved unsatisfactory. 



TRYMALIUM. 



An obscure genus of greenhouse shrubs (ord. 

 RhamneEc). Billardieri, a tall shrub with hoary 



spread of the front wings from !J"-to2J". The 

 larvae are placed with the Surface Caterpillars. 

 Pronuba, the Common Yellow Underwing, is very 

 frequently met with. The wings of the perfect 

 insects are rather large, bright yellow in hue, with 

 a narrow black marginal band. The larvse do a 

 good deal of damage to the roots of Lettuces 



Photo : Caseell & Contpany, Ltd. 



THOFJKOLVM SCNLIOHT (see p. 408)i 



foliage, the only species worth mention, is in- 

 creased by cuttings in sandy soil, in a close frame, 

 or under a bell-glass. Soil, sandy loam and leaf 

 mould in equal prirts. 



TRYPH/ENA. 



These night moths, which are closely related to 

 Noctua .and Agrotis, are popularly known as Yellow 

 Underwings. The six British species vary in 



and Cabbages, and when full fed pupate in the 

 soil. 



Tnnthina, the Lesser Broad-bordered Yellow 

 I'nderwing. is a rather smaller insect. Its larvse 

 attack the roots of Primroses and several other 

 common garden plants. Interjecta is, as the 

 popular name of Least Yellow I'nderwing denotes, 

 the smallest of the three ; its grubs do not troubla 

 the gardener much, since they subsist on the 



