AMERICAN NEUROPTERA. 



123 



the movable hook and the rest of the hiteral lobe are covered with 

 hairs. Pseiidophea jnasoni (PI. VII, Fig. 6) is a gootl type of the 

 family. In the latei'al lobe of PUdijcnemis acutipemiis (PI. VII, 

 Fig. 6 a) the development of the movable hook is proportionately 

 greater, and both that and the end hook are strongly incurved. The 

 mentum and liguhi (PI. VII, Fig. 6 b) differ a little from those of 

 Euphea. In Ejiiophlebia superstes (PI. VII, Fig. 6 c and d) the 

 movable hook is largely developed, while the end hook is small and 

 not very hook like in character. A slightly different type of end 

 hook is shown in (Jalopteryx angustipetmis (PI. VII, Fig. 6 e) ; a 

 small hook has developed upon its inner edge. In Odopteryx mncu- 

 latus (PI. VII, Fig. 6/) the end hook is divided from the rest of the 

 lateral lobe by a distinct suture. This suture is probably of second- 

 ary nature and importance. 



Besides these labia which have been figured, I have also examined 

 many others ; l)ut these show the greatest differences found. I have 

 mounted and tabulated the characters of the labia of the following: 



ANISOPTERA. 



IJBELLOLID.E. 



Brachydiplax iiidica Kirbi/. 



Bi'achytliemis contaniinata Fabr. 



Coidulia slmrtleffi Scndder. 



Diastatops tincta Ilambur. 



Didymops transversa -Hay. 



Heruicordulia tau ■ . Selys 



Macroniia illinoieiisis Walsh. 



Mesotheinis siinplicicollis Sat/. 



Micrathyria bereiiice Drurij. 



Nannotliemis bella Vhler. 



Nephepeltia pliyrne Perty. 



Onycliothemis abnonuis Braner. 



Orthemis ferriigiuia Fabr. 



Palpopleura sexuiaculata Fabr. 



Peritlieniis doniitia Drury. 



Platheuiis lydia Drury. 



Pseudophlebia minima Kirhy. 



Ehyothemis splendida Enmhur. 



Sympetruni corruptum Hagen. 



Syntheniis brevistyla Selys. 



Tetragon eui'ia spinigera Selys. 



Tramea lacerata Hagen. 



Zygouyx iris Selys. 



TRANS. AM. ENT. SOC. XXX. 



^SCHNID^. 



J<!schnin(e. 



jEschna clepsydra Say. 



^Sfhna coustricta Say. 



jEschnophlebia anisojitera Selys. 



Basitescbna Janata Say. 



Coryphseschua ingens Rambiir. 



Epiffischna heros Fabr. 



Gynacantha trifida Rambiir. 



Stauroi>hlebia niagnifica Braiier. 



GOMPHIN.E. 



Apbylla edentata Selys. 



Epigompbns paludosus Selys. 



Gompbidia confluens Selys. 



Gomphoides stigmatus Say. 



Gompbus exilis Hagen. 



Hagenius brevistylus Selys. 



Hemigomphus ocbraceus ...... .Selys. 



Opbiogomphus carolus Needham. 



Progompbus obscninis ...... .Rambiir. 



COUDULEGASTERIN.E. 

 Cordulegaster niacnhitus Selys. 



PETALURIN.E. 

 Tacliopteryx tlioreyi Seli/s. 



MAY. 1904 



