EXTERNAL ANATOMY OF INSECTS. 637 
projects beyond that of the upper: in some of the Tinee 
L., as Crambus, the wings are convoluted, and in others, 
Galleria, they are applied close to the sides of the body, 
and being elevated at the apex, terminate, to use a F'rench 
term—en queue de cog: in Noctua, Geometra, &c., the 
wings usually cover the abdomen, and are nearly hori- 
zontal. With regard to the folds of their wings, the 
Anal Area of the secondary is the only part that has any 
striking one; in Papilio Hector and affinities it turns 
up so as to defend the sides and part of the back of the 
abdomen ; in Morpho Teucer it turns down, and meeting 
that of the opposite wing forms a semitube which re- 
ceives and shelters that part below. In the Crepuscular 
and Nocturnal Lepidoptera this fold, especially in the 
former, is very slight. With respect to semifolds in the 
Diurnal, there is one originating in the disk, between 
each of the nervures, that goes to the margin of the 
wing ; likewise the under wings, particularly of many 
Noctuide, Arctia, &c., have many longitudinal semi- 
folds. 
In the Newroptera Order several variations take place 
with regard to the position of these organs in repose: 
thus, in shna, Libellula, &c., they continue expand- 
ed ; in Agrion they are applied to the body ; in Myrme- 
leon the upper are horizontally incumbent on the lower; 
in Hemerobius they incline to the horizon. With regard 
to their folds, in _4shna, &c., the longitudinal nervures 
alternately form the summit or the bottom of a semifold, 
as do those branches that terminate in the posterior mar- 
gin; this kind of plicature may be observed, but in a less 
degree, in Ascalaphus, Myrmeleon, &c.; in Panorpa every 
neryure is the ridge of a slight fold; in Termes, on the 
