290 
Philippine Journal of Science 
1919 
ENDELUS BAKERI KERREMANS 
The larvae of the first species were found by one of my stu- 
dents, Mr. F. Q. Otanes, in blotch mines, singly, on the leaves 
of the bird’s-nest fern ( Asplenium nidus L.) on January 27, 
1918, and the adults emerged on February 25. 
Since they were first brought to my attention I have succeeded 
in discovering all stages of the insect as well as the larvae, the 
pupae, and the adults of the parasites that attack them. 
EGG 
The egg is a very flat, broadly elliptical object, with obtusely 
rounded ends. It is 1.75 millimeters long and 1.09 millimeters 
wide, dark chestnut brown over its discal area and pale to 
white around its margins, which are slightly crenulate, the 
submarginal area having a crinkled or undulated surface pre- 
ceded mediad by a series of broad, rectangular, radiate fascia 
more or less indistinct. Along the median line are four groups 
of black, imbricated, subspinose prominences and an area of 
brown striae which, being in subparallel series, may represent 
the area of the micropyle (Plate I, fig. 6). 
The egg is so firmly glued to the leaf that it remains long 
after the affected leaf has died and becomes completely desic- 
cated, and it serves as an excellent index to the beginning of 
a mine, where the battered condition of the leaf might make its 
discovery otherwise difficult. It is almost invariably laid on 
the lower surface of the leaf (Plate III, fig. 1) although it has 
been found on the upper surface of leaves near the center of 
the plant or where very little space intervenes between succes- 
sive leaves (Plate III, fig. 2). 
LARVA 
Length, 7.5 millimeters; greatest width, 1.8 millimeters; thick- 
ness, 0.9 to 1 millimeter. It is pale apple green, the head being 
ochraceous or pale buff and this color dilutes the pale green of 
prothorax and mesothorax. The anal segment is almost white, 
slightly tinged with buff. The body is shiny and very translu- 
cent, so that the body fats and internal organs are plainly 
visible. The head when at rest is retracted for four-fifths its 
length into the broad, lobate prothorax, and is regularly cordate 
in outline, with a very narrow, dark brown line around its 
anterior half. The frontal suture is dark, well defined, and 
bifurcate caudad. The trophi are ferruginous, the antennae 
short, stout and pale, with a stout, blunt terminal spine mediad 
and a slender seta, eight times as long, ectad (Plate II, fig. 3). 
