OF INSULINDE. 45 
form to my friend Edw. Jacobson, who collected them at 
Moeara Antjol near Batavia in December 1907, He also 
reared them from the larvae and gave the following biolo- 
gical notes: 
The larvae are living in the sand on the seashore of 
Moeara Antjol near Batavia at about 3 meters from the 
floodline. They were collected in December and are very 
similar to those of M. frontalis and of the same size 
but paler yellow, the head with nearly the same pattern, 
the prothorax with only two dark narrow vittae. 
The dark longitudinal line of the body is enlarged to 
a rhomboidal spot on each tergit and this spot is connected 
by a broad black transverse line with the row of dark 
points at each side. The zigzag-line of frontalis wants. The 
pygidium is much shorter and nearly semicircular. 
I only saw emerged pupae, which do not differ from 
those of frontalis. The cocoon is of the same form and has 
a diameter of 7 mm. The imagines emerged in January 
and February. 
Myrmeleon acer iridescens Kirby. 
I remember to have seen, two years ago, the type in the 
British Museum, but I have nothing noted about the pattern 
of the vertex. Probably it is pretty well distinct from 
javanese specimens. 
Habitat: Christmas Island. 
Myrmeleon acer sumatrensis, nov. subsp. 
This form remembers celebensis in size, but the wings are 
more acute and narrower, so that it has an aberrant habitus. 
The markings on the head remember those of javanensis in 
form, but the lateral ones are broader and the median ones 
are connected. 
Body 24—26 mm., forew. 264—30 mm., hindw. 24—27} mm. 
Abd. 16—20 mm., gr. br. 64—7 mm, gr. br. 5—6 mm. 
Habitat: Sumatra. 
I examined. two females of which the antennae are broken 
Notes from the Leyden Museum, Vol. XX XI. 
