PRO. XEN.] 



INSECTA. 



581 



PROPTETICUS, 8cu4der,188l, Mem. Rost. Soo. 

 Nat, Hist., vol. 3, p. 334. [K'y. prnl, 

 early; p'elik**, winged.] S/apular vein 

 widely srpirued from the inediastinal, 

 arcuate, main branch arising nar the 

 base of the wiiur, part'ng widely from 

 the main stem. Tyi>e, P infernm. 

 inf-mus, Scudder, 1881, Mem. U .*t. S>c. 

 Nat, Hist., vol. 8, p. 331, Coal \feas. 



TER.HKS, Linnann, 174S, Syst-ma Naturte, 



p. 610. Not, a I'alajozoii: genii*. 

 coiitusus, see Didyrnophleps coutusa. 



Fio. 1095. Treptichnus bifnrens. The trails are 

 larger than hhowu by the figure. 



TITANOPUAMA, Brongniart, as recognized 

 by Scudder. Wing very large, moder- 

 ately sltnder; nuuration moderately 



abundant; scapular vein beginning to 

 branch iu the' middle of the basal half 

 of the wing. 



jucu'ida,Si:u Ider, 188 1, Proc. Amer. Acad., 



vol. 20, p. 16'J, Coil \[ea^. 

 TKEPI'ICIINUS, n. gen. [Kty. treptos, to be 

 turned abiut; ichnos, track.] A zigz-tg, 

 half-cylindrical, continuous trail, 

 forked at each angle, and running in 

 any direction; each line is prolonged 

 in the direction in which the animal 

 moved, at the angle, so as to form a 

 short fork or projection. Supposed to 

 bave been made by the larva or pupa 

 of some Pakeopterous insect. See re- 

 marks under Haplotichnus. Type T. 

 bil'ii'cus. 



bifurcus, n. sp. A zig/ag, half cylindrical, 

 continuous trail, quite evenly depressed, 

 and forked at each angle; the bifurca- 

 tion takes place in the direction in 

 which the animal moved, but generally 

 is less sunken than the trail, aud 

 sometimes shows-simply a dot discon- 

 nected with the angle. Collected in 

 the upper part of the Kaskaskia Group 

 at the Whetstone quarries in Orange 

 County, Indiana. 



XKXONEURA. Scudder, 1867, Can. Nat. and 

 Geo , 2d ser., v>l. 3,' p. 202. [Er.v. xenos, 

 new, strange; n a ura, a vein.] M>dtisti- 

 nal an 1 secular veins as iu Palaeip- 

 terina; externo-median vein amalga- 

 mated at base with the 

 scapular, branching be- 

 yond the middle, interno- 

 median divided at bie in 

 two branches. Type X. 

 antiquorura. 



antiqu >rum, Scudder, 1867, 



Can. Nat. and Geol., 2J ser., vol. 3, p. 

 202, and Acad. Geol., p. 525, Upper 

 Devonian. 



