168 ZOOLOGY. 
Agrion (pl. 79, fig. 73), Calepieryx (fig. T4), Libellula (jig. 75), and 
Aischna (fig. 76). They have the body slender, the wings large and 
reticulated, the head, and particularly the eyes, large, the mouth well 
developed, and they are of predaceous habits in the larva and imago state. 
In the latter the feet are slender, adapted for standing rather than for loco- 
motion, and they resemble the swallow in passing most of their time and 
taking their prey in the air. They are sometimes found in forests, but 
generally along water courses. ‘The larve are aquatic, and the eggs are 
deposited upon the water by the female, who allows the tip of her abdomen 
to touch the surface at the time of eeelolons 
Among the Myrmeleonide, the genus Myrmeleon (M. libellulordes, tee 
79, fig. 60; MM. formicarius, fig. 61a) is remarkable for the habits of the — | 
larva ( 616), which forms a conical depression in the ground where the 
éarth is dry and pulverulent (the dust of decayed wood being preferred in 
the United States). Beneath the bottom of this cavity the larva lies either 
entirely covered, or with the mandibles exposed. When an ant or other 
insect wanders across one of these pits, it slides down the sloping side, and 
the particles which roll to the bottom indicate the presence of an object, 
upon which the larva, by upward jerks of the head, tosses up a little shower 
of dust, which, falling on and around the intruder, carries it within reach 
of its wily enemy. In Virginia this insect is called a hoodlbug, and the 
repetition of this word over its opening in a half singing tone, is said to cause 
the bug to come from beneath its cover, although it is probable that the 
breath of the operator is the true cause. Ascalaphus (A. barbarus, pl. 79, 
jig. 59) is remarkable for having the antennze knobbed, as in some of the 
butterflies. 
In the family Hemerobide, the larvee of Chrysopa (pl. 79, figs. 63, 
64) are found upon plants, where they feed upon Aphedes. Drepanepteryx . 
phalenoides is remarkable for its resemblance to some of the small 
butterflies. 
The remarkable American genus, Corydalis belongs to the Stalida. 
The insects of this genus are ee a large size, the ane of the male 
resembling the horns of an ox. The ee is aquatic and predaceous. 
In the Panorpide (pl. 79, fig. 58), the head is produced into a rostrum. 
Panorpa (pl. 79, fig. 58), Bitiacus (fig. 57). 
In the Raphidude (Laphidia, pl. 19, fig. 55), the prothorax is long and 
the head flattened, presenting a distant resemblance to a snake. 
The Mantispide (Mantispa, pl. 79, jig. 54) have the body somewhat as 
in Panorpa, and the anterior feet are raptorial, resembling those of Mantes, 
with which they were classed by some of the earlier entomologists. 
The Phryganeide (pl. 79, jigs. 65-69) constitute Kirby’s order 
Trichoptera, which is adopted by a considerable number of entomologists. 
The body is soft, the wings are membranous, the posterior pair the larger, 
and generally folded longitudinally, the anterior generally pilose (whence 
the name of the order), and the antenne setaceous. The mouth is man- 
dibulate, but is unfitted for mastication, and the mandibles are obsolete. 
The pupa is inactive, and the larve are aquatic, and geperally construct 
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