OF LANCASTER COUNTY. 



r>53 



Vfith viandibles for mastication. In the sijooios most cliai-acteristic of tlie order, tin- 

 eyes conspicuously occupy the greater portion of the head. AlHlomen Iour, cylindrical 

 and compressed, with the seomonts very distinct. The legs arc of uKxlcratc sizt;. and 

 not well adapted to locomotion in the mature state. The lar;^er nunihor live in their 

 larva and;)(/^« .state in water, and are carniverous in their hahit.s. Their tnmsfonna- 

 tions diti'er very much in the different trihes. The order may he ilivided into two pri- 

 mary sections, namely: Sulicounia, havinfj the antennoe minute and getiform, with not 

 more than seven joints; eyes large; ocelli two or three; larvce aquatic; pvpa reKombliug 

 the larva3, and the imago aerial. Filicounia, having the antennae long, and filifonn, 

 setaceous, or clavate; eyes moderate; ocelli .sometimes wanting; larvje gcncralW tcn-es- 

 trial. In the fiimily Phryoankd.*:, the neurationsof the wiuj^ arc sii.yidy branching, 

 and the organs of the mouth are obsolete. 



SECT. I. PSEUDONEUBOPTERA. 



TEiiMiTiNA— "White Auts." 



Tekmes Lin. 

 flavipes Kol. 

 frontalis Hid. 



PSOCINA. 



Atropos Lch. 



pulsatorius Lch. 

 Psocus Lat. 



sparsus Hag. 



venosus Brm. 



contaminatus Hag. 



striatus Wlh. 



Peelina— "Pearl Flies.'' 



Pteronarcys New. 



regalis New. 

 Perla Geof. 



abnonnis Neio, 



arida Hag. 



dorsata i^ay. 



capitata Pic. 



xanthenes New. 



occipitalis Pic. 



maculata Pic. 

 Capnia Pic. 



pygmaea Brm. 



T^ENIOPTERYX Pic. 



fasciata Brm. 

 frigida Hag. 

 maura Pic. 

 similis Hag. 

 Leuctra Stp. 

 tenuis Pic. 



Ephemerina — " Day-flies." 



Ephemera Linn. 

 natata Wlk. 



Palinginea Brm. 



bilineata Say. 

 Baetis Jjch. 



interpunctata Say. 



verticis Say. 

 Ci-oe Lch. 



posticata Say- 



unicolor Hag. 



vicina Hag. 

 C^Nis 67;). 



amica Hag. 



Tribe AGRIONINxV. "Dovir.s-necdies. 



Calopterygina. 



Calopteryx Lch. * 



apicalis Brm. 



maculata Beav. 



virginica Drv. 

 Het^erina Hag. 



americana Fab. 



tricolor Brm. 

 Lestes Ijch. 



rectangularis Say. 



congener Hag. 



eurina Say. 



ungnieulata Hag. 

 Proton EUR.\ Sel. 



antennata Say. 

 Agrion Fab. 



iners Hag. 



ramburii Sel. 



hastatum. 



exsulans Hog. 

 Pyrrhosoma Chrp. 



.saucium Brm. 



durum Hag. 



civile Hag. 



violaceum Hag. 



apicale Say. 



