A}rEBirAX rALEOZOIC INSECTS— IIANBLTRSCH. 



718 



constructed similar to that in J-Cucwntis^iwdi Adiplilehki ; tlie prothorax 

 is enlariicd disk shaped. The front legs, like those in 1-Lur^))iis^ 

 appear to hav(^ heen somewhat elong-ated. The front wings are 

 slender, -t times as lono- as wide, and liave a stronuly arcuate antenor 

 Ix^rder, a very narrow costal area extendinuf al)Out two-thirds the h^ng'th 

 of the wing-, and a short anal area which is marked otf ])y a bow-shaped 

 fold. The radius is simple, and reaches nearly to the ti]^ of the wijig'. 

 The radial sector emerges ver}" near the base of the wing', and sends 

 oil' -i or 5 simple Ijranches extending- in a curve to the apical border. 

 The oflfshoots of the media and of tlie cubitus are hard to separate, are 

 nearl}' parallel, and are oriented toward the apical ])order. The neu- 

 ration of the hind wing- is similar to that of the front wing-, yet the 

 su]>costa proceeds much farther toward, the tip. The anal area is, 

 unfortunately, not to be made out, but was evidently plaited. 



Like the foregoing- form this a})pears to be a highly ahei-rant side 

 l)ranch oF the Protol)lattoidea. 



ANTHRACOTHREMMA Scudder. 



ANTHRACOTHREMMA ROBUSTA Scudder. 



A)i(Jir(i.e<)lhremina rnhiiKta. Scuddkk, Mem. IJostoii Soc-., Ill, 18.S5, p. 827, pi. xxx, 

 ligs. 1, 5, (). 



Locdl/ti/. — Mazon Creek, near Morris, Illinois. PiMuisylvanian; 

 Kittanning- i (Allegheny) stage. 



n<)J(dyp<'. — Cat. 



U.S.N.M. 



No. 88139, 



PROTOBLATTOIDEA INCER- 

 T.E SEDIS. 



MEGALOMETER, new 

 genus. 



MEGALOMETER LATA,newspecies. 



Locality. — Mazon Creek, near 

 Morris, Illinois. Pennsylvanian; 

 Kittanning!' (Allgeheny) stage. 



The impression of an entire 

 insect, with broad, elliptical 

 wings folded over the abdomen, 

 proportionally narrow abdomen, 

 and small, kidney-shaped protho- 

 racic shield. In habit this form 

 resembles Euc^nnx., yet the })ro- 

 thorax as Avell as the venation appear to be diti'erent. 



The length of the entire impression aiuounts to al)()ut 87 mm.; the 

 length of the fi-ont wing is about 8(» nnu. 



FlC. 3.S. — ME(iAL<)MF.TER LATA. 



