220 Transactions. 
Family HEMEROBIIDAE. 
In this family the stem of the radial sector is suppressed, in the fore- 
wing only, so that R, appears to give off a series of two or more separate 
radial sectors ; in the hindwing the basal cross-vein connecting Rs with M 
is placed longitudinally, and is curved sigmoidally. Cu, may or may not 
be present in hindwing, but Cu, never runs close to and parallel with the 
) eme, 
with Comstock-Needham notation. 1А, 2A, ЗА, the three anal veins; 
" eria e req 
ubitus ; fr 
M, media; M, Mə, М», Mg, its four branches; pt, pterostigma ; R, ; 
R,, main stem of radius; Rs, radial sector; Ro, Вз, Ry, Rg, its four 
branches (all of which appear, in the forewing, to arise separately from R 
itself) ; r-m, basal longitudinal cross-vein, in hindwing, joining R to M, and 
sigmoidally curved ; Sc, subcosta. In the figure the pterostigma is heavily 
shaded; in the insect itself this area is opaque, testaceous in colour, with 
the course of Sc through it only very faintly indicated. 
Q 
= 
bo 
up 
S 
Б 
E 
] 
= 
e 
— 
* posterior margin, as it does in the Berothidae. The frenulum is usually 
well developed in the hindwing. This type of venation is well illustrated 
by the genus Micromus, which is shown in fig. 2 as a guide to the correct 
interpretation of the veins in the other figures. 
The three genera at present found in New Zealand may be separated 
by the following key :— 
Forewing with a broad costal space, having at its base a 
1 recurrent humeral veinlet "e gs e 2 
` | Forewing with a narrow costal space, without recurrent 
humeral veinlet ; four to six radial sectors .. Micromus. 
2 ¢ Forewing faleate, with six or more radial sectors .. JDrepanacra. 
" ( Forewing well rounded, with only three radial sectors — .. Boriomyia. 
