294 REPOET UNITED STATES ENTOMOLOGICAL COMMISSION. 
costal space is wide and well marked, and the transverse veinlets are 
few and far apart, compared with the two orders just mentioned. 
The abdomen is cylindrical, and there are 9-10 uromeres. The ovi- 
positor is only developed in Raphidia, while the cercopoda are not 
developed. The metamorphosis is complete, as in the Lepidoptera, etc., 
the pupa being entirely unlike the larva, and quiescent, often protected 
by a cocoon or case. The order may be divided into two suborders: 
1. Planipennia (Sialidte, Hemerobiidce, Pauorpidae). 
2. Trichoptera (Phryganeidce). 
The following tabular view and diagram will in a degree express our 
views as to the classification of the orders of the Hexapodous or winged 
insects, with especial reference to the Pseudoueuroptera, the order per- 
haps the most difficult to bring in relation with the other Pliyloptera. 
The diagram will also serve to express our conceptions of the genealogy 
of the Hexapodous orders. 
View of the grand divisions of winged insects ( Hexapoda ). 
Superorders. 
Euglossata 141 
Orders. 
Hymenopt.era . 
Lepidoptera . . 
t Diptora. 
Elytrophora 142 . 
Eurhyuchota 143 . 
Pliyloptera 
Synaptera * 44 
Colooptcra 
Heuiiptera 
| Nouroptera 
Pseudoueuroptera 
Orthoptera 
Dermatoptera 
Thysauura 
Suborders. 
C Diptora (genuina). 
\ Aplmuiptera. 
( Pupipara. 
( Coleoptora (genuina). 
( Strepsiptera. 
{ Homoptera. 
Heteroptera. 
Physapoda. 
Mallophaga. 
f Trichoptera. 
\ Planipennia. 
( Odouata. 
< Ephomerina. 
( Platyptera. 
( Cinura. 
< Symplivla. 
t Collcmbola. 
141 We propose tho name Euglossata for the highest insects, comprising thoso orders whiob, bosides 
having the mouth parts (either the Hi st or second maxilla), or both) modified so as to sip, suck or lap 
up liquid food, also have the body cylindrical, and the thorax more or loss spherical and concentrated. 
142 This term is proposed for tho Coleoptora, which are nearly equivalent to the other superorders, 
being a remarkably circumscribed group. 
143 This term is proposod for tho Homiptera, in all of which, except tho Mallophaga and Physapoda 
(Thrips), tho mouth parts are united to form a sucking beak. 
144 This term is proposed for the Thysanuran apterous Hexapods which are perhaps nearly the mor- 
phological equivalents of either of the four other superorders. 
