NO. 1441. A.VERICAX PALEOZOIC lXSE('T)<—lIAM)LinsrIl. (\S)b 



Order MIXOTERMITOIDEA, new order. 



Thi.s order i.s likewise u provisional one, tuid includes only two t'orD:8, 

 Mirotermes luganensls Sterzel, from Saxony, and Geroncura m'llxon'i 

 Matthew, from St. John, New Brunswick, the placing of which in 

 other orders has seemed to me hazardous. 



The wings of these forms are distinouished by a broadly rounded 

 apical border, and in respect to their neuration they very closely 

 approach the paheodictyopteran type. The few branches of the 

 media, the cu))itus, and the anal veins extend obliquely to the lower 

 margin. The anal area is feebly developed, and its limits are not 

 fixed: the sul)costa is reduced, the radius simple, and its sector feel)ly 

 branched. Cross veins straight and numerous. 



There will probably be no doubt cast on the direct derivation of 

 these forms from the pahvodictyopteres. Whether, however, they 

 nuist be ]>rought into nearer relations to the protorthopteres or to the 

 perlids, I have not l)een a])le for the present to decide. 



GERONEURA Matthew. 



GERONEURA WILSONI Matthew. 



Geronenra irihoni ]\Iatthew, Trans. Roy. Hoc. C-anada, IV, 1889, ji. fi?, pi. iv, 

 fig. 10. 



■Localify. — St. John, New Brunswick, Little River group; = ':■ Potts- 

 ville age. 



Order PROTORTHOPTERA Handlirsch. 



This order embraces a series of Paleozoic forms, which are distin- 

 guished ])v more highl}' specialized wings and, according to my view, 

 constitute a transition from the paheodictyopteres to the orthopteres 

 (v. sir.). The wings of these forms are folded over the abdomen when 

 at rest; the front wings no longer have the simple venation which we 

 have seen in the l^iheodictyoptera, and their veins no longer extend 

 in regular curves to the inner margin. The hind wings are rather 

 similar to the front ones, yet possess an enlarged anal area marked oil' 

 by a fold. When the wings are at rest, this area is doubled under. The 

 l)ody is more or less strongly built; the prothorax large, often much 

 elongated; the head large with strong mouth parts fitted for chewing, 

 and with long slender antenna^. The legfs are either similar in form 

 and fitted for running, or the hind ones are transformed into legs for 

 jumping. Stridulator}' organs not yet present. 



Family SPANIODERID^], new family. 



In this family 1 place a num])er of American forms with greath' 

 elongated prothora"x and strongly vaulted cubital vein, whose oblique 

 branches are directed backward. These forms have as 3'et no legs for 

 jumping. 



