OF INSULINDE. 53 
veins, which line consists of 5 apical veins, which begins at 
the pterostigma and 3 more basalwards, which lay near 
the cubiti. In the hindwings are only three black gradate 
veins in the posterior part. 
Body “4 7, 2 7-mm., forew. 1O—11 mm., hindw. 9 mm., ant. 8 mm. 
Abd ¢ 4, 034 mm., gr. br. 38—34 mm, gr. br. 21—3 mm. 
App. { 1. 
Habitat: Java. 
I examined the types, a couple collected by Mr. M. C. 
Piepers at Rembang. The species is nearly related to B. 
indica Brauer from Ceylon. 
Hemerobidae. 
This family, which is so nearly related to the Osmylidae 
that they often are united under the name Hemerobidae, 
is distinct by the absence of a radialsector parallel with 
the radius, so that the branches of it, which form the 
longitudinal veins of the disc of the wing, emerge imme- 
diately from the radius. Radius and subcosta are united 
at the tip. The larvae live on trees and feed on Aphidae etc. 
The family is represented by one cosmopolitan genus: 
Genus Micromus Rambur (1842). 
Rambur, Hist. Ins. Neuropt. p. 416 (1842). 
To this genus belong rather small insects and it is 
nearest related to the allied cosmopolitan genus Hemerobius L. 
It is characterised by the narrow costalfield, where the 
vena recurrens at the base of the anterior wings is not 
developed (in Hemerobius it is very distinct). 
Dr. L. Zehntner -has published figures and descriptions of 
species which are useful, preying upon noxious Aphidae '). 
I presume that they belong to M. pusillus, but I am not 
sure of it, as the figures are not sufficiently enough worked 
out in details, 
The following species are known from Insulinde: 
1) Mededeelingen van het proefstation voor suikerriet in West-Java te 
Kagok—Tegal..N°. 49, p. 18 (1898). 
Notes from the Leyden Museum, Vol. XX XT. 
