NEUROPTERA. 69 
3. The Hemerosint of Latreille, which are similar to the 
.Myrmeleonides in the general form of their body and wings; 
but their antenne are filiform, and they have but four palpi. 
They form the genus 
Hemerosius, Lin. Fab. 
In some, the first segment of the trunk is very small, and the wings 
are tectiform; the last joint of the palpi is thickest, ovoid and point- 
ed. The larve are terrestrial. They form the genus 
Hemerostius, Lat. 
Or Hemerobius properly so called, also styled Demoiselles terres- 
tres. Their body is soft, and the globular eyes are frequently orna- 
mented with metallic colours; the wings are large, and their exterior 
border is widened. They fly slowly and heavily; several diffuse a 
strong fecal odour, with which the finger that has touched them 
remains for a long time impregnated. 
The female deposits ten or twelve eggs on leaves; they are oval, 
white, and secured by a very long and capillary pedicle. Some 
authors have mistaken them for a species of mushroom. The larve 
bear a considerable resemblance to those of the preceding division; 
they are, however, more elongated and errant. Reaumur calls them 
Lions des Pucerons, because they feed on Aphides. They seize them 
with their horn-like mandibles, and soon exhaust them by suction. 
Some form a thick case for themselves of their remains, which gives 
them a very singular appearance. The nymph is enclosed ina silken 
cocoon of an extremely close tissue, the volume of which is very 
small when compared with that of the Insect. The fusi of the larve 
are situated at the posterior extremity of the abdomen, like those of 
the larve of the Myrmeleonides. 
H. perla, L.3; Rees., Insect., II, Suppl., xxi, 4, 5. Green- 
yellow; eyes golden; wings transparent with entirely green ner- 
vures(i). 
The H. maculatus, Fab., has three little ocelli, while in all the 
rest of the species they are wanting. It forms the genus 
Osmytus, Lat.(2) 
(1) Add Hemerobius filosus and the albus, capitatus, phalenoides, nitidulus, hir- 
tus, fuscatus, humuli, variegatus, and nervosus, Fab. See Lat., Gen. Crust. et 
Insect., III, p. 196. 
(2) Lat., Ibid. 
