COSSID^. ' 155 



inches from tlie ground, and eats its way upwards. The sickly drooping fohage, and 

 a heap of wood dust at the foot of a tree, soon indicates that the caterpillar is carrying 

 on its destructive work inside. The pupa rests three months, and the skin half 

 protrudes from the hole when the moth escapes, which is about February." (Nietner.) 



ZEUZERA NIGRA (Plate 143, Fig. 2, ?, 2a, larva). 

 Zeuzera nigra, Moore, Aouals of Natural History, 1877, p. 348. 



Female : black ; both wings and thorax numerously speckled with minute white 

 scales. Wings narrow, acute at the apex. Body long and slender. 



Expanse 1-*- inch. 



Larva flesh colour, with lateral pink marks, horny plate on second segment dark 

 coloured. Pupa reddish, segments spinous. 



" Burrows in the root of the Coffee-tree." {Dr. Thwaites.) 



Genus ARBELA. 



Arbela, Moore, Proc. Zool. Soc. 1879, p. 411. 



Forewing elongated ; first subcostal emitted at one-third, and second at one-sixth 

 before end of the cell, third from immediately above end of the cell, trifid, the fourth 

 from below third at one-third from the base, the fifth from below fourth at half 

 before the apex ; upper discocellular longest, inwardly oblique, lower bent outward, 

 upper radial from end of the cell, lower from angle of lower discocellular ; a discoidal 

 veinlet emitted within the cell from inner angle of discocellular; three median 

 branches, lower branch emitted at one-third, and second at one-fifth before end of 

 the cell ; submedian slender, much recurved, internal vein with a basal shore lower 

 branch : hindwing short ; exterior margin very convex ; cell wide ; costal vein 

 extending to near apex ; first subcostal emitted at one-fourth before end of the cell, 

 short, joined to the costal ; discocellular bent acutely in the middle and slightly at 

 each end, a radial from upper and lower ends, a discoidal veinlet emitted within the 

 cell from inner angle of disco cellular s ; three median branches, first or lower at one- 

 half, and second at one-sixth before end of the cell ; a submedian and two internal 

 veins. Body moderate, long, hairy, with short lateral and anal tufts ; palpi minute ; 

 antennae short, bipectinated, the branches short ; legs short, pilose above. 



Type, A. tetraonis. 



ARBELA QTIADRINOTATA (Plate 143, Fig. 3, ^ ). 

 Cossus quadrinotatus, Walker, Catal. Lep. Het.B. M. vii. p. 1521 (1856). 

 Male. Cinereous-white : forewing with short brown strigge between the veins, 

 a large brown spot at end of the cell, two broad streaks below the cell, and a broken 



X 2 



