336 



NATHAN BANKS. 



SIALINA. 



This embraces two families, separated as follows : 



Prothorax quadrangular 



Prothorax loug and cylindrical. 



SIALID^. 



.RAPHIDID^. 



Key to the Genera. 



SIALID^. 



1.— No ocelli Sialis. 



Ocelli present 2. 



2. — Mandibles prominent, in % elongate Corydalis. 



Mandibles less prominent, not elongate Chaiiliodes. 



RAPHIDID^. 



1. — Ocelli present. 

 Ocelli absent... 



..Iiiocellia. 

 .Rapliidia. 



Suborder MEGALOPTEEA. 

 This embraces five families, which may be separated as follows : 



1.— Anterior legs raptorial MANTISPID^. 



Anterior legs not raptorial 2. 



2.— Wings covered with whitish powder CONIOPTERYGID^. 



Wings not powdered .3. 



3.— Antennse clavate MYRMBLEONID^. 



Antennse not clavate .' 4. 



4. — Antennse moniliform HEMEROBID^. 



Antennae setiform CHRYSOPID^. 



Fig. 5. — Hemerobid. 



A, Hemerobius ; i, subcostal; 2, radius ; 3, cubitus ; 4, postcubitus; 6, 7, 8, sectors; n, 

 recurrent vein ; g, gradate veins. B, Chrysopa ; a, third cubital cell. 



