Systematik. 271 



Soomylacris {Etohlaltina) burri n. sp, (Älmlichkeit des Flgls. mit dem von Hemi- 

 mylacris obtusa Bolton von Süd-Wales. Vergleicli dess. mit S. (Etoblaitina) 

 deanensis.) Bolton, p. 318—320 pls. XXXIII fig. 1, 2 (Dover Coalfield). 



Cryptovenidae. 



Cryptovenidae nov. fam. (wings twice as long as broad, inner and outcr margins 

 gently convex; apex ronnded. Subcostal weaker than costal, and iricrging 

 in tlie lattcr bsfore reaching tlie apex of the wing. Radius giving off a radial 

 sector below the middle of wng, the two enclosing a wide area. Radial sector 

 and median coniparatively sirnple and wath few divisions, the former ending 

 on the mng-margin in 5 rami, the latter in 4. Cubitiis with 5 marginal rami. 

 Anal veins strongly arcuate). Bolton, p. 317. — Gatt. Cryptovenia n. g. 



Cryptovenia n. g. (Vergleich mit der nahe verwandten Aihymodictya) Bolton, 

 p. 315—316. — Cr. Äloseyi n. sp. p. 315—317 pl. XXXII fig. 4—6 (Fundort 

 ■wie bei Orthocosta splendens). 



Oictyoneurldae. 



Stenodictyoneura n. g. Dictyoneur. Leriche, Ann. Soc. geol. Belgique T. 38 p. 139. 

 — St. belgica n. sp. p. 139 pl. XII (Westphalien von Hainhault). 



Lithomantidae. 



Lithomantidae. Fossile Formen von den Falkland -Inseln. Holm, Bull. geol. Inst. 

 Upsala vol. 11 p. 183 fig. 14. 



Orthocostidae. 



Orthocostidae nov. fam. (steht der Fam. der Dictyoneura Handlirsch am nächsten. 

 ,, Costal border almost straight, subcostal approaching the costal border; 

 radius straight, parallel and close to the subcosta; radial sector diverging, 

 not niore than tv/ice furcate; raedian devided into two branches united by 

 a basal comrrtissure, cubitus stout, forked near the base, the outer branch 

 forking twice and the inner branch once before reaching the inner margin; 

 anal area oblong elliptical; areas between veins filled by widely open 

 polygonal subsidiary v?nation). Bolton p. 313. — Gatt. Orthocosta n. g. 



Orthocosta n. g. Bolton, t. c. p. 313. — 0. splendens n. sp. p. 310 — 313 pl. XXXI 

 figs. 1—3 (30—40, unterhalb d. „Top Hard Goal", Middle Goal Measures, 

 Shipley Glaypit, Ilkeston [Derbyshire]). 



Pteronidi[id]ae. 



Pteronidi[id]ae nov. fam. (wings three times as long as wide. Gostal border gently 

 arcuate. Subcosta and radius closely approximate to the costa, and reaching 

 the lattcr near the tip of the wing. Radial sector with 5 simple, backwadly- 

 directed rami median divided low do^vn, with two principal branches, and 

 ending on the inner margin in 5 rami. Gubitus stout, widely spaced, divided 

 in 2 principal branches, the foremost with 2 rami and the hinder ending in 4). 

 Bolton, p. 314 — 315. — Gatt. Pteronidia n. g. 



Pteronidia n. g. (ist mit Polycreagra verwandt, hat aber einen einfacheren, mehr 

 Dictyoneura-Ijjms,). Bolton, p. 313 — 314. — Pt. plicaiula n. sp. p. 313 — 314 

 (Fundort wie bei Orthocosta splendens). 



9. H»f( 



