NEUROPTERA : HEMEROBINI. 



453 



blue, green, bronze, or red color. ALschna is very large, 

 and has the body cylindrical. The Hero-Dragon-Fly, AL. 

 heros, Fabr., is over three inches and a half long, and ex- 

 pands about five inches. Libcllula has the body rather 

 flat, as seen in Fig. 348. Diplax contains mainly yellow- 

 ish, yellowish-red, or reddish species, with long and slen- 

 der feet ; some, however, are black or dark brown. 



SIALID/E, Leach, OR CORYDALIS FAMILY. This Fam- 

 ily comprises sluggish neuroptera Fig. 351. 

 of moderate or very great 

 size, with large heads, 

 large jaws, and square 

 thoracic rings. They fre- 

 quent the neighborhood 

 of water, in which they 

 pass the larva state. 



The Genus Corydalis 

 contains the Horned Co- 

 rydalis, C. cornnta, Linn, 

 which expands five or six 

 inches. Sialis and Chau- 

 liodes are genera con- 

 taining mainly black, ferruginous, or dark brown species. 



HEMEROBINI, Latr., OR LACE-WINGED FAMILY. --This 

 Family contains very delicate-winged neuroptera, whose 

 larvae feed upon other insects, especially plant-lice. 



The Genus Hcmcrobins contains small brown species. 

 Polystocchotcs resembles the preceding, but is very much 

 larger, with more acute wings. Chrysopa contains species 

 which are about half an inch long, and which expand 

 about one inch and a quarter ; wings gauze-like, greenish, 

 eyes golden. They give a fetid smell when disturbed. 

 Mantispa has the prothorax much elongated, and the for- 

 ward feet adapted to seizing prey. 



The Genus Mynndcon contains the Ant-Lions, which in 



Larva. 



Horned Corydalis, C. cornnta of authors. 

 Reduced one half. 



