158 The Philippine Journal of Science 1920 
Bafios, on Eugenia malaccensis (coll. J. de Leon, under Banks 
18456), on unnamed host (coll. Banks 18457), on Ipomoea 
carica (coll. Banks 18454): Rizal Province, Pasig, on Gymno- 
sporia spinosa (coll. McGregor 376-4). 
On account of the previous confusion with regard to this 
species, some additional descriptive notes may assist in facil- 
itating its recognition. The female becomes quite large, as much 
as 16 millimeters long, and strongly convex when mature and 
Fic. 7. Derosicha townsendi (Ckll.), adult female; a, hairs and glands from underside of 
body, X 335; b, thoracic spiracle, X 57.5; c, hairs and glands from dorsum near body margin, 
X 885, detail of gland, X 640; d, anal ring region, X 115; e, abdominal spiracle, x 335; f, 
antenna, X 57.5. 
ready for oviposition. The anterior median notch seems to be 
constantly in evidence, although more conspicuous in the imma- 
ture forms. At the time of oviposition, the female is much 
swollen, particularly behind the middle, and is concave as viewed 
from beneath, with the cavity well packed with cottony secretion. 
In the dried state, the female exhibits a considerable variety in 
size, shape, and coloring, and might easily be mistaken for more 
than a single species if isolated specimens had been collected. 
In spite of these apparent differences, the specimens examined 
seem to be identical structurally and there is sufficient variation 
in some of the large lots of material collected by Mr. Compere 
