328 



NATHAN BANKS. 



Super-order PHYLOPTERA. 

 Order PL.ATYPTEKA. 



Sub-order PLECOPTERA. 



Family PERLID^. 



Sub-order COEEODENTIA. 



Super-family PmCINA. 



Family ATROPID^. 



Family PSOCID^. 



Super-family TEEM IT IN A. 



Family TERMITID^. 

 Family EMBID^. 

 Sub-order MALLOPHAGA. 

 Order SUBfJL,IC'OR»fIA. 



Sab-order PLECTOPTERA. 



Family EPHEMERID^. 

 Sub-order ODOXATA. 



Super-family AGRIONINA. 



Family CALOPTERIGID^. 



Family AGRIONID^. 



Super- family LIBELLULINA. 

 Family GOMPHID^. 

 F. CORDULEGASTERIDJEI 



In the text, for each family, I give a figure of the venation, with 

 explanation to facilitate the use of the keys. Most of the terms will 

 be found in ordinary text-books on Entomoh)gy. It nuist be remem- 

 bered that a key is not a criterion, but a guide. 



Family ^SGHNID^. 

 Family CORDULID^. 

 Family LIBELLULID^. 



Order IVElJROPTEItA. 



Sub-order PLANNIPENNI A. 

 Super-family SIALINA. 

 Family SIALID^. 

 Family RAPHIDID^. 



Super-family MEGALOPTERA. 

 Family MANTISPID^. 

 Family CHRYSOPID^. 

 Family HEMEROBIDID^. 

 Family MYRMELBONID^. 

 Family CONIOPTERIGID^ 



Sub-order MECAPTERA. 

 Family PANORPID^. 



Older TRICHOPTERA. 



Family PHRYGANEID^. 

 Family LIMNOPHILID^. 

 F. SERICOSTOMATID^. 

 Family HYDROPTILID^. 

 Family LEPTOCERID^. 

 Fam. HYDROPSYCHID^. 

 Fam. RHYACOPHILID^. 



Key to Suborders 



1. — Wings rudimentary or wanting 10. 



Wings two o. 



Wings four 2. 



2. — ^Hind wings broader than fore wings, folded in repose, antennae prominent .3. 



Hind wings never folded, often no broader than fore wings 5. 



.3. — Tarsi 5-jointed 4. 



Tarsi 3-jointed PLECOPTERA. 



4. — Costal area with many transverse veins SIALID^. 



Costal area nearly free TRICHOPTERA. 



.5.— Antennae short, inconspicuous STTBULICOEXIA 6. 



Antennse longer, distinct , 7, 



6. — Hind wings much shorter and narrower than fore wings, tarsi 4- or .5-jointed, 

 caudal setfe present PLECTOPTERA. 



Hind wings about equal to fore wings, tarsi 3-jointed, no caudal setse. 



ODONATA. 



