Part 1 1.] 
Waterstox : On Chalculoideu. 
outwards along the outer anterior edge of the segment. Numerous 
short white hairs stand outside tlie spiracle above the metapleuron. 
Fig. 18. Ordaiile strinrjifronis Waterst (cJ). Wing. 
Wings. Forewings 2^ times as long as broad, length 3-3 mm., breadth 
1'5 mm. To the eye very broad, widest beyond | from the base. The 
hind margin shortly concave near the base where the wing contracts 
abruptly. Neuration peculiar. The submarginal and marginal (up 
to the costal abscissa of the latter) is 1-75 mm. long, shewing (a) a more 
slender basal portion 1 mm. (entirely submarginal), (6) the swollen 
splice of marginal-submarginal -.5 mm., and (c) a short piece of the 
marginal -25 mm. For a short distance the marginal lies nearly 
on the costa towards which it thins off. The costal abscissa 
(•2 mm.) is no longer than the thin stalk of the radius and shorter 
than the postmarginal. Radius and j.ostmarginal equal- -the chib 
large and quadrate, the clear cells projecting finger-like at the ante- 
rior apical angle. Submarginal cell broad {-A mm.) spindle-shaped, the 
costa bulging anteriorly and the neuration curving back posteriorly, 
evenly and densely set below with numerous minute bristles, bare superior- 
ly. About 24 short, stiff, single bristles on the submarginal to the end 
of the distal swelling beyond which, and along the costa, the marginal 
bears many short black bristles 3-4 deep. There is a very narrow costal 
edging in front of the abscissa of the marginal, and only the postmarginal 
is truly on the costa. The stalk of the radius bears 14-16 bristles. The 
large knob about .50. Behind the submarginal the base of the wing is 
broadly bare with only a few bristles set in a curve at the foot of the 
swelling. From the apex of the latter the discal ciliation is regular, 
sparser below the radial knob, and from the latter towards the apex 
[ 83 ] 
