ANALYTICAL TABLE. 1 



SECTIONS. 



SECTION I. PSEUDONEUROPTERA ERICHS. 



Mandibulate insects with an incomplete metamorphosis (active pupa) ; 

 lower lip mostly cleft ; four membranaceous, reticulate wings (rarely 

 with rudimentary wings or apterous) ; antennae either subulate, and 

 then the tarsi three- to five-articulate, or setiform, or filiform, in 

 which case the tarsi are two- to four-articulate. 



FAMILIES. Termitina, Embidina, Psocina, Perlina, Ephemerina, 

 Odonata. 



SECTION II. NEUROPTERA ERICHS. 



Mandibulate insects with complete metamorphosis (inactive pupa) ; 

 lower lip entire ; four membranaceous, more or less reticulate wings 

 rarely with rudimentary wings or apterous) ; antennas setiform, 

 filiform, clavate, capitate, or pectinate ; tarsi five-articulate. 

 FAMILIES. iSialina, Hemerobina, Panorpina, Phryganina. 



FAMILIES. 



Four or two distinct wings ; 



Antennse inconspicuous, subulate, short and slender. 



Anterior and posterior wings nearly of the same length ; tarsi triarti- 



culate. Fam. VI. ODONATA. 



Posterior wings either smaller or wanting ; tarsi four- or five-articu- 

 late. Fam. V. EPHEMERINA. 

 Antennae mostly conspicuous, setiform, filiform, clavate, capitate, or 



pectinate. 

 Tarsi two- or three-articulate ; 



Wings equal. Fam. II. EMBIDINA. 



1 These tables, prepared by Baron Osten Sacken at the request of the Institution, are to 

 be considered as merely provisional in their nature, and as not aiming at a natural arrange- 

 ment of the families. 



