Archive image from page 587 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 576 INSECTA. Agrion, Fabr., has the wings elevated perpendicularly in repose ; the head transverse, with the eyes apart ; the form of the lower lip is similar to that of shna, but its middle lobe is slit to the base. The forehead is not fur- nished with a vesicle ; the ocelli are nearly equal in size, and arranged in a triangle on the vertex ; the abdomen is very slender and filiform, and occasionally very long. The body in the la
Archive image from page 587 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 576 INSECTA. Agrion, Fabr., has the wings elevated perpendicularly in repose ; the head transverse, with the eyes apart ; the form of the lower lip is similar to that of shna, but its middle lobe is slit to the base. The forehead is not fur- nished with a vesicle ; the ocelli are nearly equal in size, and arranged in a triangle on the vertex ; the abdomen is very slender and filiform, and occasionally very long. The body in the lara and pupa states is also long and slender, and the abdomen terminated by two oar-like appendages ; the mask is flat, with the superior extremity of the chin-piece elevated into a point in some, and forked in others. Libellida virgo, Linn., is of a golden-green or bluish-green colour, with the wings blue, either entirely or partially, and sometimes pale brownish-yellow. [This and several other species of smaller size, belonging to the siibgenera separated from Agrion by Leach, are of very common occurrence in this country.] The other Subulicorn Neuroptera have the mouth enth-ely membranous or very soft, and com- posed of parts very indistinct ; they have 5-jointed tarsi; the lower wings are much smaller than the superior, or even wanting ; and the abdomen is terminated by two or three long threads. They form the genus Ephemera, Linn.,— Thus named from the short duration of their life in the perfect state. The body is soft, long, slender, and terminated behind by two or three long articulated filaments. The antennae are very small, and composed of three joints, of which the last is very long, in the form of a conical thread. The front of the head is advanced like a hood, often keeled and notched, and covers the mouth, of which we cannot trace the organs on account of their softness and smallness. These insects carry their wings almost always elevated perpendicularly, or but s
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