" Gabby +2 INSECTA. 
The number of wings and that of the filaments of the tail furryishs 
the means of dividing the genus of the Ephemerz. | 4 
bis Be Swammerdiana, Lat.; #. longicauda, Oliv., Swamm., Bib. 
Nat., II, xiii, 6,8. The largest species known; four wings; two 
filaments to the tail twice op thrice the length of the body which 
is of a russet-yellow; eyes black. Holland and Germany, along 
the great rivers. ; ; 
E, vulgata, L.; De Geer, Insect., i, xv,9—15. Four wings; 
three filaments at the extremity of the abdomen; brown; abdo- 
men deep yellow, marked with triangular black. apr wings 
spotted with brown. 
E. diptera, L. But two wings; the male with four comieninda 
eyes, two of which are larger than the others and placed per- 
pendicularly like two columns(1). : Hae! 
FAMILY IL. 
_ PLANIPENNES. 
This family, which, with the third, forms the sates part 
of the order of the Synistata of Fabricius, comprises those 
Neuroptera in which the antenne, always multiarticulated, 
are much longer than the. head, without being subulate or 
styliform. Their mandibles are very distinct ; their inferior 
wings almost equal to the superior ones, and extended? or sim-. 
ply folded underneath at their anterior margin. . 
Their wings are almost always much reticulated and naked ; 
their maxillary palpi are ‘usually filiform or somewhat thicker 
at the extremity, shorter than the head, and composed of from 
four to five joints. 5 
1 will divide this family into five sections, which, by reason 
of the habits of the Insects that compose them, form as mae’ 
small sub-families. 
“i The PANORPAT of Latreille, which have five joints 
(1) For the other species, see Olivier, Encyc. Méthod.; Fabricius; Latreille, 
Hist. Gener. des Crust. et des Insect., .t. XIU, p. 93; and Tat. Gen. Crust. et In- 
sect., III, p. 183. , : per 
