NO. 1441. 



AMERICAN PALEOZOIC INSECTS— HANDLIRSCII. 



807 



out its sector a])ove the middle of the wing. The media, as far as 

 visible, is not branched. Then follows a vein whose curve is slightly 

 S-shaped, and which gives off several branches backward; this is 

 proba})lythe cubitus. Below this vein lies a Iji'oad open area through 

 which a fold appears to extend, and still below this is to be seen a 

 very sloping furcate vein(? anal 1) directed towai-d the posterior mai-- 

 gin. Gross veins distant and irregular. 



Ilolotype. — Impression and reverse in the U. S. National Museum: 

 Cat. Nos. 38711, 38712. 



This form may either belong to the protorthopteres or may constitute 

 a distinct group of the Palaeodictyoptera, which might be united with 

 the paoliins. It likewise somewhat recalls Pdlaeotiiastaxcarhon/s from 

 Belgium. 



ARCH.«OLOGUS, new genus. 



ARCHiEOLOGUS FALCATUS, new species. 



Locality. — Mazon Creek, near Morris, Illinois. Pennsylvanian; 

 Kittanning ? (Allegheny) stage. 



The basal portion of a fi-ont and hind wing, wiiose length may 

 amount to about 45 mm. The 



AKCH.KOI.OHITS FAI.CATr; 



anterior margin of the front 

 wing is distinctly curved. 

 Costa marginal; costal area 

 broad; subcosta not reaching 

 to the apex, with oblique vein- 

 lets directed anteriorh% be- 

 tween which cross veins may 

 be observed. Radius not far 

 removed from the suljcosta. 

 Radial sector arising below the 

 middle of the wing. Media, 



as far as visible, not divided. Cultitus separating near the base into 2 

 main branches, the superior of which is joined to the media by an 

 oblique cross vein. First anal vein not strongly arched. Hind wing- 

 evidently with enlarged anal area. Cross veins irregular, widely 

 separated. 



This form may belong to the protorthopteres or to the protoblattoids. 



HoJotypt.—ii^i. No. 38818, U.S.N.M. 



HEMERISTIA OCCIDENTALIS Dana. 



Ilemeristia occidentalis Dana, Amer. Jour. Sci. (2"), XXX\'I1, LstU, ]>. 155, lig. 2. 

 Ilemeristia occidentalis Scuddee, Mem. Boston Soc, I, 18(>6, \>. 191, pi. vi, tigs. 1, :'>. 



Locality. — Morris, Illinois. Pennsylvanian; Kittanning '{ (Alle- 

 gheny) stage. 



This form is to be regarded as the type of the genus II< nwi'htia. 

 L'ledotype.—iy^t. No. 38137, U.S.N.M. 



