OF INSULINDE, 87 
a very aberrant appearance. They are rather similar with 
Mantidae and very often both groups are confounded in 
collections. The antennae are very short and moniliform, 
scarcely longer than the head, The prothorax is extremely 
long, often longer than the rest of the body, and dilated 
in its anterior part; it often bears very characteristic 
sulci and tubercles. The anterior legs are deformed for 
preying; they have long coxae, the femur is much enlarged 
and bears long spines at the underside, the tibiae and tarsi 
are thin and as long as or shorter than the femur. 
The wings are elongate and narrow. The costalfield is 
narrow and reduced, in the hindwings often absent. The 
pterostigma is united with the united subcosta and radius 
and forms one streak with it. The nervature is mostly very 
open and in the genus Mantispa Ill. there is but one 
row of discalcells in the wings. 
The biology is very interesting as the larvae are parasites of 
Hymenoptera and Spiders and have a very complicated deve- 
lopment, hypermetamorphosis. Some species are very similar 
with some Hymenoptera and are probably copies of their hosts. 
The typical genus Mantispa Ill. is the only representa- 
tive of this family in Insulinde. 
Genus Mantispa Illiger (1798). 
Illiger, Kafer Preussens, p. 499 (1798). 
The species of this cosmopolitan genus are characterised 
by the single row of discalcells. 
The species of Insulinde are characterised in the fol- 
lowing way: 
Wings hyaline, with open nervature. Prothorax long, 
cylindrical, linear, without sulci and tubercles. Antennae 
moniliform, Small forms . . . io Antea 4: 
Wings with coloured membrane, sh nervature more 
dense. Prothorax relatively shorter and thicker, with 
transverse sulci and tubercles. Antennae rather short 
aide thek.. Larzer:formease ur | 10 cpio Valiente es 2 
Notes from the Leyden Museum, Vol. XXXI. 
