CLASS INSECTA. 



ORDER NETJROPTERA.— Ohrestotes, Dyscritus, Ephemerites, Gerephemera, Haplo- 

 phlebium, Hemeristia, Homothetus, Libellula, Lithentomum, Megathentomum, 

 Miamia, Paolia, Platephemera, Xenoneura. 



ORDER ORTHOPTERA.— Arohegogryllus, Archimylacris, Blattina, Mylacris. 



INOERTJS SEDIS— Paljeocampa. 



Abchegogryllus, Scudder, 1868, Proc. Bost. 



Soc. Nat. Hist. [Ety. archegos, first in 



time; grylliis, a cricket.] 

 priscus, Scudder, 1868, Proc. Bost. Soc. 



Nat. Hist., Coal Meas. [Sig. ancient.] 

 Abchimylacris, Scudder, 1868, Acad. Geol. 



[Ety. arche, beginning; Mylacris, cock- 

 roach.] 

 acadica, Scudder, 1868, Acad. Geol., Low. 



Carb. [Ety. proper name.] 

 mantis, Scudder, 1868, Geo. Sur. Ill.,vol. 3, 



Coal Meas. [Ety. Mantis, a. genus of 



insects.] 

 Blattina, Burmeister, 1838, Handbuch der 



Entomologie. [Ety. Blatta, a cock- 

 roach.] 

 bretonensis, Scudder, 1875, Can. Nat., n. 



s., vol. 7, Carboniferous. [Ety. proper 



name.] 

 heeri, Scudder, 1868, Geo. Sur. 111., vol. 3, 



Coal Meas. [Ety. proper name.] 

 sepulta, Scudder, 1876, Can. Nat. & Geo., 



vol. 8, Carboniferous. [Sig. lulled to 



sleep, buried.] 

 venusta, Lesquereux, 1860, Geo. Ark., 



vol. 2, Coal Meas. [Sig. handsome.] 

 Chrestotes, Scudder, 1868, Geo. Sur, 111., vol. 



3. [Ety. chrestotes, good of its kind.] 

 lapidea, Scudder, 1868, Geo. Sur. 111., vol. 



3, Coal Meas. [Sig. stony.] 

 Dyscritus, Scudder, 1868, Geo. Mag., vol. 5. 



[Ety. dyscritos, hard to determine, 



doubtful.] 

 vetustus, Scudder, 1868, Geo. Mag., vol. 



5, Devonian. [Sig. ancient.] 

 Ephemerites, Scudder, 1868, Geo. Sur. 111., 



vol. 3. [Ety. from resemblance to the 



Ephemera.} 

 affinis, Scudder, 1868, Geo. Sur. 111., vol. 



3, Coal Meas. [Sig. related to.] 

 gigas, Scudder, 1868, Geo. Sur. 111., vol. 



3, Coal Meas. [Sig. large.] 

 simplex, Scudder, 1868, Geo. Sur. 111., vol. 



3, Coal Meas. [Sig. simple.] 

 28 



Gerephemera, Scudder, 1868, Geo. Mag., 



vol. 5. [Ety. geros, old; Ephemera, a 



genus of insects.] 

 simplex, Scudder, 1868, Geo. Mag., vol. 5, 



Devonian. [Sig. simple.] 

 Haplophlebium, Scudder, 1867, Can. Nat. 



& Geo., 2(1 ser., vol. 3. [Ety. haplos, 



simple; phlebion, a, vein.} 

 barnesi, Scudder, 1867, Can. Nat. & Geo., 



2d ser., vol. 3, Coal Meas. [Ety. 



proper name.] 

 Hemeristia, Dana, 1864, Am. Jour. Sci. & 



Arts, 2d ser., vol. 37. [Ety. hemera, 



day.] 

 occidentalis, Dana, 1864, Am. Jour. Sci. 



& Arts, '2d ser., vol. 37, Coal Meas. 



[Sig. western.] 

 Homothetus, Scudder, 1867,Can. Nat. & Geo., 



2d series, vol. 3. [Ety. homos, similar; 



thesis, placed.] 

 fossilis, Scudder, 1867, Can. Nat. & Geo., 



2nd series, vol. 3, Ham. or Chemung 



Gr. [Sig. fossil, extinct.] 

 Libellula, Fabricius, 1776, as identified by 



Scudder. 

 carbonaria, Scudder, 1876, Can. Nat. & 



Geo., vol. 8, Coal Meas. [Sig. pertain- 

 ing to coal.] 

 Lithentomum, Scudder, 1867,Can. Nat. &Geo. 



2d series, vol. 3. [Ety. lithos, stone; 



entomon, an insect.] 

 harti, Scudder, 1867, Can. Nat. & Geo., 



2nd series, vol. 3, Ham. or Chemung 



Gr. [Ety. proper name.] 

 Megathentomum, Scudder, 1868, Geo. Sur. 



111., vol. 3. [Ety. megathos, largeness ; 



entonwn, an insect.] 

 pustulatum, Scudder, 1868, Geo. Sur. HI., 



vol. 3, Coal Meas. [Sig. covered with 



pustules.] 

 Miamia, Dana, 1864, Am. Jour. Sci. & Arts, 



2d ser., vol. 37. [Ety. proper name.] 

 bronsoni, Dana, 1864, Am. Jour. Sci. & 



Arts, 2d ser., vol. 37, Coal Meas. [Ety. 



proper name.] 



