NEUROPTERA. 57 
PRAMILY Tot 
SUBUE CORES, Lat. (1) 
This family is sunt of the order Odonata ‘ok Fabri- 
cius, and of the genus Ephemera. The antenne are subulate, 
and hardly longer than the head; they are composed of seven 
joints at most, the last of which is setaceous. The mandibles 
and the maxille are completely covered by the labrum and 
labium, or by the anterior and projecting etinennity of the 
head. 
The wings are always reticulated and distant, sometimes 
laid horizontally and sometimes placed perpendicularly; the 
inferior are as large as the superior, or sometimes very small 
and even wanting. The ordinary eyes are very large and 
prominent in all of thems; and they all have two or three 
ocelli situated between the former. The two first periods 
of their life are passed in the bosom of the waters, yleais they 
prey on living animals. | 
The larve and chrysalides, which approximate in form to 
the perfect Insect, respire by means of peculiar organs situated 
on the sides or extremity of the abdomen. They issue from 
the water to undergo their ultimate ssa el ip 
In some the mandibles and maxillz are corneous, very strong, 
and covered by the two lips; the tarsi are triarticulated; the wings 
are equal, and the posterior extremity of the abdomen is simply ter- 
minated by hooks or laminiform or foliaceous appendages. . They 
form the Fabrician order of the Odonata, or the genus» 
- Lipe.ura, Lin. Geoff. 
The light and graceful figure of these Insects, the beautiful and va- 
(1) A section, divided into two families, the Linzrnunin», in my Fam: Nat. du 
Régn. Animal. 
Vou. IV.—H 
