636 Prof. Mario wees Report on a Collection of 
7 (6). Wings not so coloured; discal cell more obtuse ; second 
longitudinal vein not so curved before the end ; abdomen 
without black erect hairs. 
8 (9). Wings darkened, the costal portion more intensively ; first 
posterior cell very narrowed at the end; abdomen with 
patches of scales on the sides. lepidogastra, sp. n., p. 639. 
9 (8). Wings clear, obliquely bordered with black on the anterior 
half; first posterior cell broadly open ; sides of the abdo- 
men without scales : : siqmoidea, sp. n., p. 640, 
10 (5). The transverse vein between the discal and the second basal 
cell straight, or only slightly curved. 
11 (22). Wings obliquely bordered with black on the anterior half 
and the posterior half clear, without isolated black spots 
and with the discal cell mostly hyaline. 
12 (19). The black fore border of the wings without any black 
projection on the external upper angle of the discal cell ; 
legs black or with only reddish tibiae. 
13 (16). Pleurae wholly with yellowish hairs or with the yellow hairs 
predominant ; metapleural tuft yellow-grey, absolutely 
without black hairs. 
14 (15). Antennae black ; sides of the second, third dia fourth ab- 
dominal segments with a single broad silvery spot, which 
is connected with a white transverse band on the third seg- 
ment; discal cell short and broad . dimidiata, Macq. p. 641. 
15 (14). Antennae reddish at base ; sides of the abdomen without 
such a large silvery spot; discal cell narrow and more 
than twice as long as broad . discriminata, sp. n., p. 641. 
16 (13). Pleurae with black hairs; metapleural tuft black or with 
the black hairs predominant. 
17 (18). Third abdominal segment only with a white band ; meta- 
pleural tuft black; tibiae black ; black costal border of 
the wings extending beyond the small cross-vein ; species 
of greater size. . «+  buctifera, sp. n., p. 642. 
18 (17). Abdomen with the earl third and fourth segments wholly 
argenteous; metapleural tuft black and grey; tibiae 
reddish ; black costal border ending a little beyond the 
small cross-vein ; species of smaller size 
argyrophora, sp. n., p. 643. 
19 (12). The black fore border with a black tooth over the external 
angle of the discal cell ; legs reddish or red. 
20 (21). The external upper angle of the discal cell is wholly filled 
with black. 4 ; argentifrons, Macq., p. 643. 
21 (20). The external upper angle of the discal cell is hyaline 
scaligera, sp. D., p. 643. 
